76 results on '"Federico Bianchini"'
Search Results
2. First-Principles Study of the Structural Stability and Dynamic Properties of Li2MSiO4 (M = Mn, Co, Ni) Polymorphs
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Ponniah Vajeeston, Federico Bianchini, and Helmer Fjellvåg
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cathode materials ,Li ion battery ,structural stability ,mechanical stability ,DFT study ,relative stability ,electronic structure ,transport properties ,Technology - Abstract
In recent years, the scientific community has shown an increasing interest in regards to the investigation of novel materials for the intercalation of lithium atoms, suitable for application as cathodes in the new generations of Li-ion batteries. Within this framework, we have computed the relative structural stability, the electronic structure, the elastic and dynamic properties of Li2MSiO4 compounds (M = Mn, Co, Ni) by means of first-principles calculations based on density functional theory. The so-obtained structural parameters of the examined phases are in agreement with previous reports. The energy differences between different polymorphs are found to be small, and most of these structures are dynamically stable. The band structures and density of states are computed to analyse the electronic properties and characterise the chemical bonding. The single crystal elastic constants are calculated for all the examined modifications, proving their mechanical stability. These Li2MSiO4 materials are found to present a ductile behaviour upon deformation. The diffusion coefficients of Li ions, calculated at room temperature for all the examined modifications, reveal a poor conductivity for this class of materials.
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- 2019
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- View/download PDF
3. Properties of Novel Non-Silicon Materials for Photovoltaic Applications: A First-Principle Insight
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Murugesan Rasukkannu, Dhayalan Velauthapillai, Federico Bianchini, and Ponniah Vajeeston
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HSE06 ,non-silicon ,non-conventional solar cells ,PV materials ,hybrid density function ,BSE ,Technology ,Electrical engineering. Electronics. Nuclear engineering ,TK1-9971 ,Engineering (General). Civil engineering (General) ,TA1-2040 ,Microscopy ,QH201-278.5 ,Descriptive and experimental mechanics ,QC120-168.85 - Abstract
Due to the low absorption coefficients of crystalline silicon-based solar cells, researchers have focused on non-silicon semiconductors with direct band gaps for the development of novel photovoltaic devices. In this study, we use density functional theory to model the electronic structure of a large database of candidates to identify materials with ideal properties for photovoltaic applications. The first screening is operated at the GGA level to select only materials with a sufficiently small direct band gap. We extracted twenty-seven candidates from an initial population of thousands, exhibiting GGA band gap in the range 0.5–1 eV. More accurate calculations using a hybrid functional were performed on this subset. Based on this, we present a detailed first-principle investigation of the four optimal compounds, namely, TlBiS2, Ba3BiN, Ag2BaS2, and ZrSO. The direct band gap of these materials is between 1.1 and 2.26 eV. In the visible region, the absorption peaks that appear in the optical spectra for these compounds indicate high absorption intensity. Furthermore, we have investigated the structural and mechanical stability of these compounds and calculated electron effective masses. Based on in-depth analysis, we have identified TlBiS2, Ba3BiN, Ag2BaS2, and ZrSO as very promising candidates for photovoltaic applications.
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- 2018
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4. Dynamics of Interlayer Na-Ions in Ga-Substituted Na2Zn2TeO6 (NZTO) Studied by Variable-Temperature Solid-State 23Na NMR Spectroscopy and DFT Modeling
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Frida Sveen Hempel, Charlotte Martineau-Corcos, Federico Bianchini, Helmer Fjellvåg, and Bjørnar Arstad
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General Medicine - Published
- 2023
5. Antifluorite-type Na5FeO4 as a low-cost, environment-friendly cathode with combined cationic/anionic redox activity for sodium ion batteries: a first-principles investigation
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Rasmus Vester Thøgersen, Federico Bianchini, Helmer Fjellvåg, and Ponniah Vajeeston
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General Chemical Engineering ,General Chemistry - Abstract
The rapid electrification of our society and the transition towards a larger share of intermittent renewable energy sources in our electricity grids will dramatically increase the demand for cheap energy storage. Sodium ion batteries (SIBs) show a lot of promise to provide the required stationary storage at the grid level at low cost owing to the natural abundance and geographical availability of sodium. In addition, alkali-rich cathode materials exhibiting anionic redox contributions have garnered much attention over the past decade as a strategy to increase the specific capacity. In this work, we investigate for the first time the sodium-rich compound Na5FeO4 as a potential low-cost, environment-friendly cathode for sodium ion batteries from first principles using density functional theory. We investigate three low-energy polymorphs related to the antifluorite structure, verify their dynamical and mechanical stabilities, and show that they exhibit promising ion diffusive properties. As alkali-rich cathode materials are prone to oxygen loss during cycling, we investigate cycling stability with respect to phase transformations and oxygen loss and identify in particular one promising cycling interval that can reversibly shuttle 1.5 Na+ per formula unit between Na5FeO4 and Na3.5FeO4 with a gravimetric energy density exceeding 360 W h kg−1. Investigations into possible redox mechanisms reveal that the charge compensation occurs simultaneously on Fe- and O-atoms in FeO4-tetrahedra, which suggests that Na5FeO4, if realised experimentally as a cathode material, would join the family of combined cationic/anionic redox compounds.
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- 2022
6. The Simons Observatory: science goals andforecasts
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Peter Ade, James Aguirre, Zeeshan Ahmed, Simone Aiola, Aamir Ali, David Alonso, Marcelo A. Alvarez, Kam Arnold, Peter Ashton, Jason Austermann, Humna Awan, Carlo Baccigalupi, Taylor Baildon, Darcy Barron, Nick Battaglia, Richard Battye, Eric Baxter, Andrew Bazarko, James A. Beall, Rachel Bean, Dominic Beck, Shawn Beckman, Benjamin Beringue, Federico Bianchini, Steven Boada, David Boettger, J. Richard Bond, Julian Borrill, Michael L. Brown, Sarah Marie Bruno, Sean Bryan, Erminia Calabrese, Victoria Calafut, Paolo Calisse, Julien Carron, Anthony Challinor, Grace Chesmore, Yuji Chinone, Jens Chluba, Hsiao-Mei Sherry Cho, Steve Choi, Gabriele Coppi, Nicholas F. Cothard, Kevin Coughlin, Devin Crichton, Kevin D. Crowley, Kevin T. Crowley, Ari Cukierman, John M. D'Ewart, Rolando Dünner, Tijmen de Haan, Mark Devlin, Simon Dicker, Joy Didier, Matt Dobbs, Bradley Dober, Cody J. Duell, Shannon Duff, Adri Duivenvoorden, Jo Dunkley, John Dusatko, Josquin Errard, Giulio Fabbian, Stephen Feeney, Simone Ferraro, Pedro Fluxà, Katherine Freese, Josef C. Frisch, Andrei Frolov, George Fuller, Brittany Fuzia, Nicholas Galitzki, Patricio A. Gallardo, Jose Tomas Galvez Ghersi, Jiansong Gao, Eric Gawiser, Martina Gerbino, Vera Gluscevic, Neil Goeckner-Wald, Joseph Golec, Sam Gordon, Megan Gralla, Daniel Green, Arpi Grigorian, John Groh, Chris Groppi, Yilun Guan, Jon E. Gudmundsson, Dongwon Han, Peter Hargrave, Masaya Hasegawa, Matthew Hasselfield, Makoto Hattori, Victor Haynes, Masashi Hazumi, Yizhou He, Erin Healy, Shawn W. Henderson, Carlos Hervias-Caimapo, Charles A. Hill, J. Colin Hill, Gene Hilton, Matt Hilton, Adam D. Hincks, Gary Hinshaw, Renée Hložek, Shirley Ho, Shuay-Pwu Patty Ho, Logan Howe, Zhiqi Huang, Johannes Hubmayr, Kevin Huffenberger, John P. Hughes, Anna Ijjas, Margaret Ikape, Kent Irwin, Andrew H. Jaffe, Bhuvnesh Jain, Oliver Jeong, Daisuke Kaneko, Ethan D. Karpel, Nobuhiko Katayama, Brian Keating, Sarah S. Kernasovskiy, Reijo Keskitalo, Theodore Kisner, Kenji Kiuchi, Jeff Klein, Kenda Knowles, Brian Koopman, Arthur Kosowsky, Nicoletta Krachmalnicoff, Stephen E. Kuenstner, Chao-Lin Kuo, Akito Kusaka, Jacob Lashner, Adrian Lee, Eunseong Lee, David Leon, Jason S.-Y. Leung, Antony Lewis, Yaqiong Li, Zack Li, Michele Limon, Eric Linder, Carlos Lopez-Caraballo, Thibaut Louis, Lindsay Lowry, Marius Lungu, Mathew Madhavacheril, Daisy Mak, Felipe Maldonado, Hamdi Mani, Ben Mates, Frederick Matsuda, Loïc Maurin, Phil Mauskopf, Andrew May, Nialh McCallum, Chris McKenney, Jeff McMahon, P. Daniel Meerburg, Joel Meyers, Amber Miller, Mark Mirmelstein, Kavilan Moodley, Moritz Munchmeyer, Charles Munson, Sigurd Naess, Federico Nati, Martin Navaroli, Laura Newburgh, Ho Nam Nguyen, Michael Niemack, Haruki Nishino, John Orlowski-Scherer, Lyman Page, Bruce Partridge, Julien Peloton, Francesca Perrotta, Lucio Piccirillo, Giampaolo Pisano, Davide Poletti, Roberto Puddu, Giuseppe Puglisi, Chris Raum, Christian L. Reichardt, Mathieu Remazeilles, Yoel Rephaeli, Dominik Riechers, Felipe Rojas, Anirban Roy, Sharon Sadeh, Yuki Sakurai, Maria Salatino, Mayuri Sathyanarayana Rao, Emmanuel Schaan, Marcel Schmittfull, Neelima Sehgal, Joseph Seibert, Uros Seljak, Blake Sherwin, Meir Shimon, Carlos Sierra, Jonathan Sievers, Precious Sikhosana, Maximiliano Silva-Feaver, Sara M. Simon, Adrian Sinclair, Praween Siritanasak, Kendrick Smith, Stephen R. Smith, David Spergel, Suzanne T. Staggs, George Stein, Jason R. Stevens, Radek Stompor, Aritoki Suzuki, Osamu Tajima, Satoru Takakura, Grant Teply, Daniel B. Thomas, Ben Thorne, Robert Thornton, Hy Trac, Calvin Tsai, Carole Tucker, Joel Ullom, Sunny Vagnozzi, Alexander van Engelen, Jeff Van Lanen, Daniel D. Van Winkle, Eve M. Vavagiakis, Clara Vergès, Michael Vissers, Kasey Wagoner, Samantha Walker, Jon Ward, Ben Westbrook, Nathan Whitehorn, Jason Williams, Joel Williams, Edward J. Wollack, Zhilei Xu, Byeonghee Yu, Cyndia Yu, Fernando Zago, Hezi Zhang, and Ningfeng Zhu
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Astrophysics ,Astronomy - Abstract
The Simons Observatory (SO) is a new cosmic microwave background experiment being built on Cerro Toco in Chile, due to begin observations in the early 2020s. We describe the scientific goals of the experiment, motivate the design, and forecast its performance. SO will measure the temperature and polarization anisotropy of the cosmic microwave background in six frequency bands centered at: 27, 39, 93, 145, 225 and 280 GHz. The initial configuration of SO will have three small-aperture 0.5-m telescopes and one large-aperture 6-m telescope, with a total of 60,000 cryogenic bolometers. Our key science goals are to characterize the primordial perturbations, measure the number of relativistic species and the mass of neutrinos, test for deviations from a cosmological constant, improve our understanding of galaxy evolution, and constrain the duration of reionization. The small aperture telescopes will target the largest angular scales observable from Chile, mapping ≈ 10% of the sky to a white noise level of 2 μK-arcmin in combined 93 and 145 GHz bands, to measure the primordial tensor-to-scalar ratio, r, at a target level of σ(r)=0.003. The large aperture telescope will map ≈ 40% of the sky at arcminute angular resolution to an expected white noise level of 6 μK-arcmin in combined 93 and 145 GHz bands, overlapping with the majority of the Large Synoptic Survey Telescope sky region and partially with the Dark Energy Spectroscopic Instrument. With up to an order of magnitude lower polarization noise than maps from the Planck satellite, the high-resolution sky maps will constrain cosmological parameters derived from the damping tail, gravitational lensing of the microwave background, the primordial bispectrum, and the thermal and kinematic Sunyaev-Zel'dovich effects, and will aid in delensing the large-angle polarization signal to measure the tensor-to-scalar ratio. The survey will also provide a legacy catalog of 16,000 galaxy clusters and more than 20,000 extragalactic sources.
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- 2019
- Full Text
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7. Effects of Ga Substitution on the Local Structure of Na
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Frida Sveen, Hempel, Federico, Bianchini, Bjørnar, Arstad, and Helmer, Fjellvåg
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Ions ,Zinc ,Magnetic Resonance Spectroscopy ,X-Ray Diffraction ,Sodium - Abstract
In the work presented here, we prepared Ga-substituted NZTO (Na
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- 2022
8. Forecasting ground-based sensitivity to the Rayleigh scattering of the CMB in the presence of astrophysical foregrounds
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Karia R. Dibert, Adam J. Anderson, Amy N. Bender, Bradford A. Benson, Federico Bianchini, John E. Carlstrom, Thomas M. Crawford, Riccardo Gualtieri, Yuuki Omori, Zhaodi Pan, Srinivasan Raghunathan, Christian L. Reichardt, and W. L. Kimmy Wu
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Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics - Instrumentation and Methods for Astrophysics ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
The Rayleigh scattering of cosmic microwave background (CMB) photons off the neutral hydrogen produced during recombination effectively creates an additional scattering surface after recombination that encodes new cosmological information, including the expansion and ionization history of the universe. A first detection of Rayleigh scattering is a tantalizing target for next-generation CMB experiments. We have developed a Rayleigh scattering forecasting pipeline that includes instrumental effects, atmospheric noise, and astrophysical foregrounds (e.g., Galactic dust, cosmic infrared background, or CIB, and the thermal Sunyaev-Zel'dovich effect). We forecast the Rayleigh scattering detection significance for several upcoming ground-based experiments, including SPT-3G+, Simons Observatory, CCAT-prime, and CMB-S4, and examine the limitations from atmospheric and astrophysical foregrounds as well as potential mitigation strategies. When combined with Planck data, we estimate that the ground-based experiments will detect Rayleigh scattering with a significance between 1.6 and 3.7, primarily limited by atmospheric noise and the CIB., 19 pages, 7 figures (v2 additional author added)
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- 2022
9. Near-Broken-Gap Alignment between FeWO4 and Fe2WO6 for Ohmic Direct p–n Junction Thermoelectrics
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Federico Bianchini, Truls Norby, Helmer Fjellvåg, and Raphael Schuler
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p-n junction ,Materials science ,Condensed matter physics ,Diagram ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Thermoelectric materials ,01 natural sciences ,Ohmic contact ,0104 chemical sciences ,broken-gap junction ,Electrical resistivity and conductivity ,Seebeck coefficient ,band alignment ,General Materials Science ,Density functional theory ,thermoelectric oxides ,0210 nano-technology ,Spectroscopy ,p–n junction ,computational first-principles modeling ,Research Article - Abstract
We report a near-broken-gap alignment between p-type FeWO4 and n-type Fe2WO6, a model pair for the realization of Ohmic direct junction thermoelectrics. Both undoped materials have a large Seebeck coefficient and high electrical conductivity at elevated temperatures, due to inherent electronic defects. A band-alignment diagram is proposed based on X-ray photoelectron and ultraviolet–visible light reflectance spectroscopy. Experimentally acquired nonrectifying I–V characteristics and the constructed band-alignment diagram support the proposed formation of a near-broken-gap junction. We have additionally performed computational modeling based on density functional theory (DFT) on bulk models of the individual compounds to rationalize the experimental band-alignment diagram and to provide deeper insight into the relevant band characteristics. The DFT calculations confirm an Fe-3d character of the involved band edges, which we suggest is a decisive feature for the unusual band overlap.
- Published
- 2021
10. Antifluorite-type Na
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Rasmus Vester, Thøgersen, Federico, Bianchini, Helmer, Fjellvåg, and Ponniah, Vajeeston
- Abstract
The rapid electrification of our society and the transition towards a larger share of intermittent renewable energy sources in our electricity grids will dramatically increase the demand for cheap energy storage. Sodium ion batteries (SIBs) show a lot of promise to provide the required stationary storage at the grid level at low cost owing to the natural abundance and geographical availability of sodium. In addition, alkali-rich cathode materials exhibiting anionic redox contributions have garnered much attention over the past decade as a strategy to increase the specific capacity. In this work, we investigate for the first time the sodium-rich compound Na
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- 2022
11. Constraining radio mode feedback in galaxy clusters with the cluster radio AGNs properties to z ∼ 1
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Nikhel Gupta, Tesla E. Jeltema, X. Shao, C. Lidman, Santiago Avila, Vinu Vikram, Michael McDonald, E. Buckley-Geer, David J. Brooks, R. L. C. Ogando, Joseph J. Mohr, M. E. C. Swanson, D. L. Hollowood, V. Scarpine, Shantanu Desai, Maurilio Pannella, Peter Doel, S. Serrano, V. Strazzullo, I-Non Chiu, Matthias Klein, John P. Stott, Enrique Gaztanaga, Robert A. Gruendl, Michael Schubnell, Basilio X. Santiago, J. P. Dietrich, Juan Garcia-Bellido, E. Suchyta, Ramon Miquel, E. J. Sanchez, August E. Evrard, Marcos Lima, Rafe Schindler, J. Annis, Kyler Kuehn, Federico Bianchini, M. Costanzi, J. Gschwend, G. Gutierrez, Christian L. Reichardt, David J. James, A. Saro, Antonella Palmese, A. A. Plazas, L. N. da Costa, M. Smith, I. Sevilla-Noarbe, Daniel Gruen, M. A. G. Maia, S. Everett, F. Paz-Chinchón, J. de Vicente, Jennifer L. Marshall, Esra Bulbul, M. Carrasco Kind, Alfredo Zenteno, J. Carretero, Eli S. Rykoff, A. Carnero Rosell, K. Honscheid, Felipe Menanteau, Gupta, N., Pannella, M., Mohr, J. J., Klein, M., Rykoff, E. S., Annis, J., Avila, S., Bianchini, F., Brooks, D., Buckley-Geer, E., Bulbul, E., Carnero Rosell, A., Carrasco Kind, M., Carretero, J., Chiu, I., Costanzi, M., da Costa, L. N., De Vicente, J., Desai, S., Dietrich, J. P., Doel, P., Everett, S., Evrard, A. E., García-Bellido, J., Gaztanaga, E., Gruen, D., Gruendl, R. A., Gschwend, J., Gutierrez, G., Hollowood, D. L., Honscheid, K., James, D. J., Jeltema, T., Kuehn, K., Lidman, C., Lima, M., Maia, M. A. G., Marshall, J. L., Mcdonald, M., Menanteau, F., Miquel, R., Ogando, R. L. C., Palmese, A., Paz-Chinchón, F., Plazas, A. A., Reichardt, C. L., Sanchez, E., Santiago, B., Saro, A., Scarpine, V., Schindler, R., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Shao, X., Smith, M., Stott, J. P., Strazzullo, V., Suchyta, E., Swanson, M. E. C., Vikram, V., and Zenteno, A.
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submillimeter: galaxies ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Active galactic nucleus ,Radio galaxy ,Astrophysics::High Energy Astrophysical Phenomena ,galaxies: active ,FOS: Physical sciences ,galaxies [submillimeter] ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,01 natural sciences ,Luminosity ,Intracluster medium ,0103 physical sciences ,clusters: general [galaxies] ,010306 general physics ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,Galaxy cluster ,Luminosity function (astronomy) ,Physics ,Astronomy and Astrophysics ,luminosity function, mass function [galaxies] ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Galaxy ,galaxies: luminosity function ,galaxies: clusters: general ,mass function ,Space and Planetary Science ,cosmology: observations ,Astrophysics of Galaxies (astro-ph.GA) ,active [galaxies] ,galaxies: luminosity function, mass function ,High Energy Physics::Experiment ,observation [cosmology] ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We study the properties of the Sydney University Molonglo Sky Survey (SUMSS) 843~MHz radio AGN population in galaxy clusters from two large catalogs created using the Dark Energy Survey (DES): $\sim$11,800 optically selected RM-Y3 and $\sim$1,000 X-ray selected MARD-Y3 clusters. We show that cluster radio loud AGN are highly concentrated around cluster centers to $z\sim1$. We measure the halo occupation number for cluster radio AGN above a threshold luminosity, finding that the number of radio AGN per cluster increases with cluster halo mass as $N\propto M^{1.2\pm0.1}$ ($N\propto M^{0.68\pm0.34}$) for the RM-Y3 (MARD-Y3) sample. Together, these results indicate that radio mode feedback is favoured in more massive galaxy clusters. Using optical counterparts for these sources, we demonstrate weak redshift evolution in the host broad band colors and the radio luminosity at fixed host galaxy stellar mass. We use the redshift evolution in radio luminosity to break the degeneracy between density and luminosity evolution scenarios in the redshift trend of the radio AGN luminosity function (LF). The LF exhibits a redshift trend of the form $(1+z)^\gamma$ in density and luminosity, respectively, of $\gamma_{\rm D}=3.0\pm0.4$ and $\gamma_{\rm P}=0.21\pm0.15$ in the RM-Y3 sample, and $\gamma_{\rm D}=2.6\pm0.7$ and $\gamma_{\rm P}=0.31\pm0.15$ in MARD-Y3. We discuss the physical drivers of radio mode feedback in cluster AGN, and we use the cluster radio galaxy LF to estimate the average radio-mode feedback energy as a function of cluster mass and redshift and compare it to the core ($, Comment: 20 pages, 15 figures Replaced with published version
- Published
- 2020
12. Inference of gravitational lensing and patchy reionization with future CMB data
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Federico Bianchini and Marius Millea
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Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,FOS: Physical sciences ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We develop an optimal Bayesian solution for jointly inferring secondary signals in the Cosmic Microwave Background (CMB) originating from gravitational lensing and from patchy screening during the epoch of reionization. This method is able to extract full information content from the data, improving upon previously considered quadratic estimators for lensing and screening. We forecast constraints using the Marginal Unbiased Score Expansion (MUSE) method, and show that they are largely dominated by CMB polarization, and depend on the exact details of reionization. For models consistent with current data which produce the largest screening signals, a detection (3\,$\sigma$) of the cross-correlation between lensing and screening is possible with SPT-3G, and a detection of the auto-correlation is possible with CMB-S4. Models with the lowest screening signals evade the sensitivity of SPT-3G, but are still possible to detect with CMB-S4 via their lensing cross-correlation., Comment: 11 pages, 5 figures, 2 tables, prepared for submission to PRD
- Published
- 2022
- Full Text
- View/download PDF
13. Effects of Ga Substitution on the Local Structure of Na2Zn2TeO6
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Frida Sveen Hempel, Federico Bianchini, Bjørnar Arstad, and Helmer Fjellvåg
- Subjects
Inorganic Chemistry ,Physical and Theoretical Chemistry - Abstract
In the work presented here, we prepared Ga-substituted NZTO (Na2–xZn2–xGaxTeO6, x = 0.00, 0.05, 0.10, 0.15, 0.20) layered materials with a soft chemical, citric acid-based synthesis method and characterized these by means of X-ray diffraction (XRD), 23Na and 125Te NMR, and by density functional theory (DFT) modeling. The influence of randomly distributed Ga cations on the 125Te NMR spectra confirms the successful synthesis. With DFT-based linear response computations, we show that the local distribution of Na ions in the two neighboring interlayers influences the 125Te chemical shift, consistent with observations. DFT modeling suggests that some of the Na sites are rarely occupied in pure NZTO but become favorable upon Ga substitution. There are clear indications that Ga substitution gives an uneven distribution of Na ions in neighboring interlayers and that the Na structure in one layer affects the adjacent layers.
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- 2022
14. Measurements of the E -mode polarization and temperature- E -mode correlation of the CMB from SPT-3G 2018 data
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Faustin Carter, S. E. Kuhlmann, Junjia Ding, Gene C. Hilton, J. C. Hood, A. T. Lee, M. Millea, Erik Shirokoff, Oliver Jeong, N. W. Halverson, Thomas Cecil, John E. Pearson, G. I. Noble, John E. Carlstrom, E. V. Denison, B. Thorne, K. Prabhu, C. L. Kuo, François R. Bouchet, M. Korman, Federico Bianchini, K. Dibert, S. Padin, Ethan Anderes, Neil Goeckner-Wald, D. Riebel, J. E. Ruhl, Jason W. Henning, Nikhel Gupta, N. Huang, M. Rouble, M. Jonas, RB Thakur, K. L. Thompson, J. T. Sayre, C. Tucker, A. A. Stark, A. Lowitz, M. A. Dobbs, N. L. Harrington, Z. Pan, Karen Byrum, A. H. Harke-Hosemann, C. Lu, Srinivasan Raghunathan, B. Riedel, C. L. Chang, A. Cukierman, Andreas Bender, Z. Ahmed, K. Aylor, E. M. Leitch, Alexandra S. Rahlin, S. Guns, J. A. Sobrin, K. W. Yoon, D. Howe, P. Chaubal, Young, Graeme Smecher, C. Umilta, J. F. Cliche, T. de Haan, Silvia Galli, H. Nguyen, Lloyd Knox, T. Natoli, K. Vanderlinde, T. M. Crawford, J. Fu, P. Paschos, S. S. Meyer, Christian L. Reichardt, H-M. Cho, L. R. Vale, A. Foster, K. T. Story, Karim Benabed, E. Hivon, E. Schiappucci, Anthony P. Jones, Andrew Nadolski, Lindsey Bleem, Jessica Avva, Peter S. Barry, L. Balkenhol, Bradford Benson, Yefremenko, R. Guyser, R. Gualtieri, C. M. Posada, Chang Feng, G. P. Holder, A. M. Kofman, Daniel Michalik, Novosad, J. D. Vieira, C. Daley, Gensheng Wang, W. L. Holzapfel, W. Quan, K. R. Ferguson, Adam Anderson, Gang Chen, Nathan Whitehorn, Robert Gardner, M. Archipley, Y. Omori, A. Suzuki, Lincoln Bryant, D. Dutcher, T.-L. Chou, Trupti Khaire, Joshua Montgomery, J. Stephen, A. E. Gambrel, Kent D. Irwin, W. L. K. Wu, Donna Kubik, P. A. R. Ade, and W. B. Everett
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Physics ,010308 nuclear & particles physics ,Cosmic microwave background ,Spectral density ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Parameter space ,01 natural sciences ,7. Clean energy ,symbols.namesake ,Amplitude ,Gravitational lens ,South Pole Telescope ,0103 physical sciences ,symbols ,Planck ,Multipole expansion ,010303 astronomy & astrophysics - Abstract
We present measurements of the $E$-mode ($EE$) polarization power spectrum and temperature-$E$-mode ($TE$) cross-power spectrum of the cosmic microwave background using data collected by SPT-3G, the latest instrument installed on the South Pole Telescope. This analysis uses observations of a 1500 deg$^2$ region at 95, 150, and 220 GHz taken over a four month period in 2018. We report binned values of the $EE$ and $TE$ power spectra over the angular multipole range $300 \le \ell < 3000$, using the multifrequency data to construct six semi-independent estimates of each power spectrum and their minimum-variance combination. These measurements improve upon the previous results of SPTpol across the multipole ranges $300 \le \ell \le 1400$ for $EE$ and $300 \le \ell \le 1700$ for $TE$, resulting in constraints on cosmological parameters comparable to those from other current leading ground-based experiments. We find that the SPT-3G dataset is well-fit by a $\Lambda$CDM cosmological model with parameter constraints consistent with those from Planck and SPTpol data. From SPT-3G data alone, we find $H_0 = 68.8 \pm 1.5 \mathrm{km\,s^{-1}\,Mpc^{-1}}$ and $\sigma_8 = 0.789 \pm 0.016$, with a gravitational lensing amplitude consistent with the $\Lambda$CDM prediction ($A_L = 0.98 \pm 0.12$). We combine the SPT-3G and the Planck datasets and obtain joint constraints on the $\Lambda$CDM model. The volume of the 68% confidence region in six-dimensional $\Lambda$CDM parameter space is reduced by a factor of 1.5 compared to Planck-only constraints, with only slight shifts in central values. We note that the results presented here are obtained from data collected during just half of a typical observing season with only part of the focal plane operable, and that the active detector count has since nearly doubled for observations made with SPT-3G after 2018.
- Published
- 2021
15. Fractional polarization of extragalactic sources in the 500 deg2 SPTpol survey
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C. Sievers, J. T. Sayre, A. E. Lowitz, Jeff McMahon, Christian L. Reichardt, C. Corbett Moran, John E. Carlstrom, K. K. Schaffer, T. de Haan, V. G. Yefremenko, D. Luong-Van, Eric R. Switzer, Robert I. Citron, Dale Li, V. Novosad, Chihway Chang, A. T. Crites, Jessica Avva, C. Pryke, Kent D. Irwin, W. L. K. Wu, Johannes Hubmayr, R. Williamson, M. Archipley, Elizabeth George, N. Huang, John P. Nibarger, K. Vanderlinde, W. L. Holzapfel, A. A. Stark, J. D. Hrubes, Andrew Nadolski, H. C. Chiang, T. Natoli, T. Veach, Gene C. Hilton, Nikhel Gupta, W. B. Everett, G. I. Noble, Federico Bianchini, Adrian T. Lee, Lloyd Knox, Peter A. R. Ade, S. S. Meyer, Lindsey Bleem, J. E. Ruhl, K. T. Story, Joseph J. Mohr, S. Patil, Chang Feng, M. A. Dobbs, G. P. Holder, Jason Gallicchio, Nathan Whitehorn, Jason W. Henning, Zhen Hou, L. Zhang, N. W. Halverson, N. L. Harrington, Joshua Montgomery, Erik Shirokoff, J. A. Beall, Benjamin Saliwanchik, Bradford Benson, Z. K. Staniszewski, Carole Tucker, Jason E. Austermann, Graeme Smecher, A. J. Gilbert, Adam Anderson, L. M. Mocanu, Daniel P. Marrone, S. Padin, Gensheng Wang, Andreas Bender, Joaquin Vieira, and T. M. Crawford
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Physics ,010308 nuclear & particles physics ,Space and Planetary Science ,Linear polarization ,0103 physical sciences ,Astronomy and Astrophysics ,Astrophysics ,010303 astronomy & astrophysics ,01 natural sciences ,Full sample ,Fractional polarization - Abstract
Author(s): Gupta, N; Reichardt, CL; Ade, PAR; Anderson, AJ; Archipley, M; Austermann, JE; Avva, JS; Beall, JA; Bender, AN; Benson, BA; Bianchini, F; Bleem, LE; Carlstrom, JE; Chang, CL; Chiang, HC; Citron, R; Corbett Moran, C; Crawford, TM; Crites, AT; de Haan, T; Dobbs, MA; Everett, W; Feng, C; Gallicchio, J; George, EM; Gilbert, A; Halverson, NW; Harrington, N; Henning, JW; Hilton, GC; Holder, GP; Holzapfel, WL; Hou, Z; Hrubes, JD; Huang, N; Hubmayr, J; Irwin, KD; Knox, L; Lee, AT; Li, D; Lowitz, A; Luong-Van, D; Marrone, DP; McMahon, JJ; Meyer, SS; Mocanu, LM; Mohr, JJ; Montgomery, J; Nadolski, A; Natoli, T; Nibarger, JP; Noble, GI; Novosad, V; Padin, S; Patil, S; Pryke, C; Ruhl, JE; Saliwanchik, BR; Sayre, JT; Schaffer, KK; Shirokoff, E; Sievers, C; Smecher, G; Staniszewski, Z; Stark, AA; Story, KT; Switzer, ER; Tucker, C; Vanderlinde, K; Veach, T; Vieira, JD; Wang, G; Whitehorn, N; Williamson, R; Wu, WLK; Yefremenko, V; Zhang, L | Abstract: We study the polarization properties of extragalactic sources at 95 and 150 GHz in the SPTpol 500 deg2 survey. We estimate the polarized power by stacking maps at known source positions, and correct for noise bias by subtracting the mean polarized power at random positions in the maps. We show that the method is unbiased using a set of simulated maps with similar noise properties to the real SPTpol maps. We find a flux-weighted mean-squared polarization fraction 〈p2〉= [8.9 ± 1.1] × 10−4 at 95 GHz and [6.9 ± 1.1] × 10−4 at 150 GHz for the full sample. This is consistent with the values obtained for a subsample of active galactic nuclei. For dusty sources, we find 95 per cent upper limits of 〈p2〉95 l 16.9 × 10−3 and 〈p2〉150 l 2.6 × 10−3. We find no evidence that the polarization fraction depends on the source flux or observing frequency. The 1σ upper limit on measured mean-squared polarization fraction at 150 GHz implies that extragalactic foregrounds will be subdominant to the CMB E and B mode polarization power spectra out to at least l ≲ 5700 (l ≲ 4700) and l ≲ 5300 (l ≲ 3600), respectively, at 95 (150) GHz.
- Published
- 2019
16. Nonhexagonal Na Sublattice Reconstruction in the Super-Ionic Conductor Na2Zn2TeO6: Insights from Ab Initio Molecular Dynamics
- Author
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Federico Bianchini, Ponniah Vajeeston, and Helmer Fjellvåg
- Subjects
Ab initio molecular dynamics ,Work (thermodynamics) ,General Energy ,Materials science ,Distribution (number theory) ,Chemical physics ,Ionic bonding ,Density functional theory ,Physical and Theoretical Chemistry ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials ,Conductor ,Ion - Abstract
In this work, we examine the distribution of Na+ ions in the interlayer of the super-ionic conductor Na2Zn2TeO6 by means of atomistic first-principle modeling based on density functional theory. Th...
- Published
- 2019
17. P2 Type Layered Solid-State Electrolyte Na2Zn2TeO6: Crystal Structure and Stacking Faults
- Author
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Ponniah Vajeeston, David S. Wragg, Xinyu Li, Helmer Fjellvåg, Julia Wind, and Federico Bianchini
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Crystallography ,Materials science ,Renewable Energy, Sustainability and the Environment ,Materials Chemistry ,Electrochemistry ,Stacking ,Crystal structure ,Solid state electrolyte ,Type (model theory) ,Condensed Matter Physics ,Surfaces, Coatings and Films ,Electronic, Optical and Magnetic Materials - Published
- 2019
18. A first-principle study of NaMPO4 (M = Mn, Fe, Co, Ni) possible novel structures as cathode materials for sodium-ion batteries: Structural and electrochemical characterisation
- Author
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Helmer Fjellvåg, Federico Bianchini, and Ponniah Vajeeston
- Subjects
Materials science ,Intermetallic ,02 engineering and technology ,Maricite ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Ion ,Transition metal ,Phase (matter) ,Physical chemistry ,General Materials Science ,Density functional theory ,0210 nano-technology ,Coordination geometry - Abstract
Transition metal containing polyanion compounds are effective excellent electrode materials for sodium-ion batteries due to their high intrinsic electrochemical potentials and to the resulting high energy density. Iron sodium phosphates, in particular, are attractive due to the large natural abundance of both Na and Fe. These materials have been extensively studied in their most common olivine structures: maricite and triphylite. In this work, we expand the current knowledge of this class of materials by investigating the structural properties and the energetics of a series of modification exhibiting different coordination for the intermetallic atom M = Mn, Fe, Co, Ni by means of density functional theory calculations. An expanded-volume NaFePO4 configuration with the zeolite ABW structure is predicted to be stable at high temperature. This type of structure, presenting a tetrahedral Fe O coordination geometry, has been previously reported only for the NaCoPO4 case. A semi-amorphous phase is predicted to be a possible metastable intermediate configuration between the known octahedral coordinated structures and the novel tetrahedral-coordinated one. The electrochemical characterisation of the latter reveals a similar deintercalation potential with respect to triphylite, and a higher diffusion barrier caused by the incompressibility of the PO4 tetrahedra along the diffusive path. This result offers important insight about the correlation between the diffusive properties of ions and their local chemical environment.
- Published
- 2018
19. Tu nombre no es tu nombre : Historia de una identidad robada en la dictadura argentina
- Author
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Federico Bianchini and Federico Bianchini
- Subjects
- Dictatorship--Argentina, Identity (Psychology)--Argentina, Disappeared persons--Argentina, Children of disappeared persons--Argentina--Biography, Children of disappeared persons--Family relationships--Argentina
- Abstract
En el año 2000, un juez citó a la protagonista de este libro para decirle que su nombre no era Mercedes Landa, como ella había creído siempre, sino Claudia Poblete Hlaczik. Y que las personas que la habían criado no eran sus padres, sino sus secuestradores. Sus verdaderos padres, dos jóvenes militantes de izquierdas, habían sido torturados y desaparecidos en 1978, durante la dictadura argentina. Y ella, con solo ocho meses, fue entregada a una familia de militares para que la criase como a una hija propia. Este libro no solo reconstruye la gran mentira en la que vivió Claudia y la historia de sus padres, sino que también explora su tortuoso camino para recomponer una identidad atrapada entre dos mundos de afectos y convicciones contrapuestos. Esta historia real es un ejemplo de cómo el autoritarismo decide sobre la vida y la muerte de sus gobernados, y también se apropia de sus cuerpos y sus biografías. Y de cómo el tesón de las víctimas —tanto de la familia de Claudia como del colectivo de las Abuelas de Plaza de Mayo— acaba abriendo una rendija hacia la verdad. ACERCA DEL AUTOR Federico Bianchini es periodista y licenciado en Comunicación. Ha trabajado como redactor en los diarios Clarín y La Razón, y como editor en la revista Anfibia. También ha colaborado en medios argentinos e internacionales, como Gatopardo, El País Semanal y The New York Times, entre otros. Ha publicado los libros Desafiar al cuerpo, Cuerpos al límite y Antártida: 25 días encerrado en el hielo (este último gracias a la beca Michael Jacobs de la Fundación Gabriel García Márquez). En enero de 2013 ganó el premio de periodismo Don Quijote.
- Published
- 2023
20. Searching for anisotropic cosmic birefringence with polarization data from SPTpol
- Author
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Kent D. Irwin, W. L. Holzapfel, Jason W. Henning, A. A. Stark, J. D. Hrubes, Jeff McMahon, N. W. Halverson, Andreas Bender, T. M. Crawford, T.-L. Chou, L. Balkenhol, C. Sievers, Gensheng Wang, W. L. K. Wu, John E. Carlstrom, E. J. Baxter, W. B. Everett, Joshua Montgomery, Christian L. Reichardt, Marius Millea, A. E. Lowitz, V. G. Yefremenko, C. Pryke, Adrian T. Lee, Lloyd Knox, Dale Li, Joaquin Vieira, K. Vanderlinde, Gene C. Hilton, L. M. Mocanu, Jason Gallicchio, Y. Omori, K. K. Schaffer, Peter A. R. Ade, S. Patil, A. T. Crites, Jason E. Austermann, K. T. Story, S. S. Meyer, C. Corbett Moran, Valentine Novosad, T. de Haan, Jessica Avva, Graeme Smecher, P. Chaubal, J. E. Ruhl, A. J. Gilbert, Benjamin Saliwanchik, Gilbert Holder, Adam Anderson, M. A. Dobbs, A. Manzotti, S. Padin, Nathan Whitehorn, N. Huang, H. C. Chiang, Nikhel Gupta, Carole Tucker, G. I. Noble, Federico Bianchini, G. Simard, John P. Nibarger, Andrew Nadolski, J. A. Beall, Robert I. Citron, T. Natoli, Lindsey Bleem, Elizabeth George, T. Veach, Johannes Hubmayr, C. L. Chang, Bradford Benson, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and SPT
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,media_common.quotation_subject ,Cosmic microwave background ,FOS: Physical sciences ,anisotropy ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,01 natural sciences ,temperature: fluctuation ,polarization: rotation ,High Energy Physics - Phenomenology (hep-ph) ,0103 physical sciences ,inflation ,Anisotropy ,010303 astronomy & astrophysics ,media_common ,Physics ,COSMIC cancer database ,birefringence ,Chern-Simons term ,010308 nuclear & particles physics ,coupling constant ,magnetic field: primordial ,Astrophysics::Instrumentation and Methods for Astrophysics ,correlation: higher-order ,Spectral density ,Polarization (waves) ,Cosmology ,cosmic background radiation: temperature ,High Energy Physics - Phenomenology ,Amplitude ,South Pole Telescope ,13. Climate action ,Sky ,power spectrum: angular dependence ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a search for anisotropic cosmic birefringence in 500 deg$^2$ of southern sky observed at 150 GHz with the SPTpol camera on the South Pole Telescope. We reconstruct a map of cosmic polarization rotation anisotropies using higher-order correlations between the observed cosmic microwave background (CMB) $E$ and $B$ fields. We then measure the angular power spectrum of this map, which is found to be consistent with zero. The non-detection is translated into an upper limit on the amplitude of the scale-invariant cosmic rotation power spectrum, $L(L+1)C_L^{\alpha\alpha}/2\pi < 0.10 \times 10^{-4}$ rad$^2$ (0.033 deg$^2$, 95% C.L.). This upper limit can be used to place constraints on the strength of primordial magnetic fields, $B_{1 \rm Mpc} < 17 {\rm nG} $ (95% C.L.), and on the coupling constant of the Chern-Simons electromagnetic term $g_{a\gamma} < 4.0 \times 10^{-2}/H_I $ (95% C.L.), where $H_I$ is the inflationary Hubble scale. For the first time, we also cross-correlate the CMB temperature fluctuations with the reconstructed rotation angle map, a signal expected to be non-vanishing in certain theoretical scenarios, and find no detectable signal. We perform a suite of systematics and consistency checks and find no evidence for contamination., Comment: 17 pages, 7 figures - new subsection on non-Gaussian foregrounds, conclusions unchanged - updated to match published version on PRD
- Published
- 2020
21. Measurements of B -mode polarization of the cosmic microwave background from 500 square degrees of SPTpol data
- Author
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W. B. Everett, Jason Gallicchio, S. Patil, Lindsey Bleem, G. P. Holder, K. Vanderlinde, P. Chaubal, Jeff McMahon, S. S. Meyer, Gensheng Wang, C. L. Chang, C. Sievers, J. D. Hrubes, T. de Haan, Elizabeth George, Kent D. Irwin, Jason W. Henning, L. M. Mocanu, W. L. Holzapfel, Robert I. Citron, A. T. Crites, N. W. Halverson, Christian L. Reichardt, Jason E. Austermann, John P. Nibarger, Andrew Nadolski, Joaquin Vieira, T. Natoli, Bradford Benson, Graeme Smecher, W. L. K. Wu, C. Corbett Moran, Matt Dobbs, Jessica Avva, N. L. Harrington, T. M. Crawford, Gene C. Hilton, Stephen Padin, A. J. Gilbert, Adam Anderson, Dale Li, H. C. Chiang, John E. Carlstrom, J. E. Ruhl, Amy N. Bender, C. Tucker, K. K. Schaffer, N. Huang, A. E. Lowitz, Valentine Novosad, Antony A. Stark, J. T. Sayre, Johannes Hubmayr, T. Veach, J. A. Beall, G. I. Noble, Adrian T. Lee, Federico Bianchini, Lloyd Knox, Nikhel Gupta, Benjamin Saliwanchik, V. G. Yefremenko, C. Pryke, Joshua Montgomery, Peter A. R. Ade, and Nathan Whitehorn
- Subjects
Physics ,Quantum Physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,010308 nuclear & particles physics ,Cosmic microwave background ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,Molecular ,Spectral density ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Polarization (waves) ,Atomic ,Nuclear & Particles Physics ,7. Clean energy ,01 natural sciences ,Particle and Plasma Physics ,South Pole Telescope ,0103 physical sciences ,astro-ph.CO ,Nuclear ,Anisotropy ,010303 astronomy & astrophysics ,Astronomical and Space Sciences ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We report a B-mode power spectrum measurement from the cosmic microwave background (CMB) polarization anisotropy observations made using the SPTpol instrument on the South Pole Telescope. This work uses 500 deg$^2$ of SPTpol data, a five-fold increase over the last SPTpol B-mode release. As a result, the bandpower uncertainties have been reduced by more than a factor of two, and the measurement extends to lower multipoles: $52 < \ell < 2301$. Data from both 95 and 150 GHz are used, allowing for three cross-spectra: 95 GHz x 95 GHz, 95 GHz x 150 GHz, and 150 GHz x 150 GHz. B-mode power is detected at very high significance; we find $P(BB < 0) = 5.8 \times 10^{-71}$, corresponding to a $18.1 ��$ detection of power. An upper limit is set on the tensor-to-scalar ratio, $r < 0.44$ at 95% confidence (the expected $1 ��$ constraint on $r$ given the measurement uncertainties is 0.22). We find the measured B-mode power is consistent with the Planck best-fit $��$CDM model predictions. Scaling the predicted lensing B-mode power in this model by a factor Alens, the data prefer Alens = $1.17 \pm 0.13$. These data are currently the most precise measurements of B-mode power at $\ell > 320$., 16 pages, 4 figures, Submitted to PRD
- Published
- 2020
22. Insights into Crystal Structure and Diffusion of Biphasic Na
- Author
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Xinyu, Li, Federico, Bianchini, Julia, Wind, Christine, Pettersen, David S, Wragg, Ponniah, Vajeeston, and Helmer, Fjellvåg
- Subjects
Na+ ion conductor ,Na2Zn2TeO6 ,O′3-type ,P2-type ,layered structure ,Research Article - Abstract
The layered oxide Na2Zn2TeO6 is a fast Na+ ion conductor and a suitable candidate for application as a solid-state electrolyte. We present a detailed study on how synthesis temperature and Na-content affect the crystal structure and thus the Na+ ion conductivity of Na2Zn2TeO6. Furthermore, we report for the first time an O′3-type phase for Na2Zn2TeO6. At a synthesis temperature of 900 °C, we obtain a pure P2-type phase, providing peak performance in Na+ ion conductivity. Synthesis temperatures lower than 900 °C produce a series of mixed P2 and O′3-type phases. The O′3 structure can only be obtained as a pure phase by substituting Li on the Zn-sites to increase the Na-content. Thorough analysis of synchrotron data combined with computational modeling indicates that Li enters the Zn sites and, consequently, the amount of Na in the structure increases to balance the charge according to the formula Na2+xZn2–xLixTeO6 (x = 0.2–0.5). Impedance spectroscopy and computational modeling confirm that reducing the amount of the O′3-type phase enhances the Na+ ion mobility.
- Published
- 2020
23. Results of gravitational lensing and primordial gravitational waves from the POLARBEAR experiment
- Author
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Peter A. R. Ade, Davide Poletti, C. Verges, Shunsuke Adachi, Kam Arnold, Yuji Chinone, A. Suzuki, Yuto Minami, Chang Feng, J. Peloton, Nathan Whitehorn, Oliver Jeong, N. W. Halverson, Yuki Inoue, T. Hamada, Akito Kusaka, Y. Zhou, A. Zahn, A. Cukierman, M. Aguilar, Carole Tucker, D. Beck, Nicoletta Krachmalnicoff, Rolando Dünner, Brian Keating, Paul L. Richards, Stephen M. Feeney, J. C. Groh, Julian Borrill, C. Tsai, Joshua Montgomery, Darcy Barron, Theodore Kisner, R. Stompor, G. Hall, D. Boettger, Tucker Elleflot, Josquin Errard, Frederick Matsuda, L. N. Lowry, D. Leon, Takayuki Tomaru, Reijo Keskitalo, Benjamin Westbrook, M. Navaroli, D. Kaneko, K. Cheung, Osamu Tajima, A. T. P. Pham, Eric V. Linder, Giulio Fabbian, A. J. Gilbert, L. Howe, Neil Goeckner-Wald, H. El-Bouhargani, Max Silva-Feaver, Hans P. Paar, M. A. Dobbs, S. Takatori, Federico Bianchini, Colin Ross, Christian L. Reichardt, John Groh, Praween Siritanasak, Julien Carron, Tomotake Matsumura, T. Fujino, Y. Akiba, H. Nishino, G. Jaehnig, Giuseppe Puglisi, Charles A. Hill, D. Tanabe, Andrew H. Jaffe, Masashi Hazumi, Nicholas Galitzki, Blake D. Sherwin, S. Kikuchi, Carlo Baccigalupi, E. M. Leitch, S. Beckman, N. Katayama, Grant Teply, A. Ducout, Aashrita Mangu, M. LeJeune, Adrian T. Lee, Nathan Stebor, Masaya Hasegawa, S. Takakura, Y. Segawa, Scott Chapman, Kevin T. Crowley, Chinone, Y, Adachi, S, Ade, P, Aguilar, M, Akiba, Y, Arnold, K, Baccigalupi, C, Barron, D, Beck, D, Beckman, S, Bianchini, F, Boettger, D, Borrill, J, Elbouhargani, H, Carron, J, Chapman, S, Cheung, K, Crowley, K, Cukierman, A, Dunner, R, Dobbs, M, Ducout, A, Elleflot, T, Errard, J, Fabbian, G, Feeney, S, Feng, C, Fujino, T, Galitzki, N, Gilbert, A, Goeckner-Wald, N, Groh, J, Hall, G, Halverson, N, Hamada, T, Hasegawa, M, Hazumi, M, Hill, C, Howe, L, Inoue, Y, Jaehnig, G, Jaffe, A, Jeong, O, Lejeune, M, Kaneko, D, Katayama, N, Keating, B, Keskitalo, R, Kikuchi, S, Kisner, T, Krachmalnicoff, N, Kusaka, A, Lee, A, Leitch, E, Leon, D, Linder, E, Lowry, L, Mangu, A, Matsuda, F, Matsumura, T, Minami, Y, Montgomery, J, Navaroli, M, Nishino, H, Paar, H, Peloton, J, Pham, A, Poletti, D, Puglisi, G, Reichardt, C, Richards, P, Ross, C, Segawa, Y, Sherwin, B, Silva-Feaver, M, Siritanasak, P, Stebor, N, Stompor, R, Suzuki, A, Tajima, O, Takakura, S, Takatori, S, Tanabe, D, Teply, G, Tomaru, T, Tsai, C, Tucker, C, Verges, C, Westbrook, B, Whitehorn, N, Zahn, A, Zhou, Y, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), POLARBEAR, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)
- Subjects
History ,satellite: Planck ,Cosmic microwave background ,gravitational lensing ,cosmic background radiation: polarization ,detector: noise ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Gravity waves ,power spectrum ,01 natural sciences ,Education ,Primary mirror ,symbols.namesake ,Settore FIS/05 - Astronomia e Astrofisica ,gravitation: lens ,Polarization ,0103 physical sciences ,Planck ,mirror ,010303 astronomy & astrophysics ,Physics ,COSMIC cancer database ,010308 nuclear & particles physics ,Gravitational wave ,Settore FIS/05 ,POLARBEAR experiment ,Gravitational effects ,gravitational radiation: primordial ,Astrophysics::Instrumentation and Methods for Astrophysics ,Polarization (waves) ,Galaxy ,Computer Science Applications ,Gravitational lens ,B-mode ,symbols ,[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] ,galaxy - Abstract
POLARBEAR is a Cosmic Microwave Background radiation (CMB) polarization experiment that is located in the Atacama Desert in Chile. The scientific goals of the experiment are to characterize the B-mode signal from gravitational lensing, as well as to search for B-mode signals created by primordial gravitational waves (PGWs). Polarbear started observations in 2012 and has published a series of results. These include the first measurement of a nonzero B-mode angular auto-power spectrum at sub-degree scales where the dominant signal is gravitational lensing of the CMB. In addition, we have achieved the first measurement of crosscorrelation between the lensing potential, which was reconstructed from the CMB polarization data alone by Polarbear, and the cosmic shear field from galaxy shapes by the Subaru Hyper Suprime-Cam (HSC) survey. In 2014, we installed a continuously rotating half-wave plate (CRHWP) at the focus of the primary mirror to search for PGWs and demonstrated the control of low-frequency noise. We have found that the low-frequency B-mode power in the combined dataset with the Planck high-frequency maps is consistent with Galactic dust foreground, thus placing an upper limit on the tensor-to-scalar ratio of r < 0.90 at the 95% confidence level after marginalizing over the foregrounds.
- Published
- 2020
24. The SPTpol Extended Cluster Survey
- Author
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Shahab Joudaki, M. Costanzi, Matt Dobbs, C. L. Chang, Carole Tucker, E. Bertin, Dale Li, Michael McDonald, A. E. Lowitz, T. M. Crawford, Mark Brodwin, W. B. Everett, A. Roodman, N. W. Halverson, J. Carretero, Santiago Serrano, G. Khullar, Elizabeth George, Adam Anderson, M. Smith, James A. Beall, C. Sievers, Nathan Whitehorn, Valentine Novosad, Marcelle Soares-Santos, Devon L. Hollowood, Volodymyr Yefremenko, C. Pryke, D. Gruen, Nesar Ramachandra, Gensheng Wang, Antonella Palmese, Steven W. Allen, John P. Nibarger, T. Veach, J. D. Hrubes, A. K. Romer, Ramon Miquel, H. T. Diehl, G. I. Noble, W. L. K. Wu, Niall MacCrann, Juan Garcia-Bellido, L. N. da Costa, Christian L. Reichardt, Federico Bianchini, B. Flaugher, Jason E. Austermann, A. A. Plazas, Jason Gallicchio, K. Honscheid, Santiago Avila, Joshua Montgomery, Amy N. Bender, N. L. Harrington, Robert A. Gruendl, Matthias Klein, A. T. Crites, Sebastian Bocquet, S. Patil, L. M. Mocanu, John E. Carlstrom, A. Carnero Rosell, Peter A. R. Ade, B. Stalder, Tesla E. Jeltema, T. de Haan, E. Buckley-Geer, K. K. Schaffer, K. T. Story, Jeff McMahon, J. Gschwend, Shantanu Desai, Benjamin Floyd, Keith Bechtol, Bradford Benson, Catherine Heymans, Jason W. Henning, Antony A. Stark, Joaquin Vieira, Graeme Smecher, Robert I. Citron, M. L. N. Ashby, Lloyd Knox, M. A. G. Maia, A. Saro, J. P. Dietrich, Chris Blake, T. Natoli, N. P. Kuropatkin, James Annis, J. T. Sayre, Michael D. Gladders, J. L. Marshall, C. Corbett Moran, Keith Vanderlinde, Joseph J. Mohr, Kent D. Irwin, W. L. Holzapfel, Jochen Weller, Jessica Avva, David Parkinson, Johannes Hubmayr, Stephen Padin, Joshua A. Frieman, Felipe Menanteau, Gregory Tarle, Tim Schrabback, Matthew B. Bayliss, Eli S. Rykoff, D. L. Burke, E. J. Sanchez, G. Gutierrez, Lindsey Bleem, N. Huang, A. Gilbert, H. C. Chiang, Yanxi Zhang, Tim Eifler, J. D. Remolina González, Benjamin Saliwanchik, F. Paz-Chinchón, Adrian T. Lee, D. W. Gerdes, D. H. Brooks, S. S. Meyer, G. P. Holder, Guillaume Mahler, M. Carrasco Kind, J. E. Ruhl, J. De Vicente, E. Suchyta, Nikhel Gupta, David James, C. Lidman, Keren Sharon, A. Nadolski, Peter Melchior, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), SPT, DES, Bleem, L. E., Bocquet, S., Stalder, B., Gladders, M. D., Ade, P. A. R., Allen, S. W., Anderson, A. J., Annis, J., Ashby, M. L. N., Austermann, J. E., Avila, S., Avva, J. S., Bayliss, M., Beall, J. A., Bechtol, K., Bender, A. N., Benson, B. A., Bertin, E., Bianchini, F., Blake, C., Brodwin, Brooks, D., Buckley-Geer, E., Burke, D. L., Carlstrom, J. E., Rosell, A. Carnero, Carrasco Kind, M., Carretero, J., Chang, C. L., Chiang, H. C., Citron, R., Moran, C. Corbett, Costanzi, M., Crawford, T. M., Crites, A. T., da Costa, L. N., de Haan, T., De Vicente, J., Desai, S., Diehl, H. T., Dietrich, J. P., Dobbs, M. A., Eifler, T. F., Everett, W., Flaugher, B., Floyd, B., Frieman, J., Gallicchio, J., García-Bellido, J., George, E. M., Gerdes, D. W., Gilbert, A., Gruen, D., Gruendl, R. A., Gschwend, J., Gupta, N., Gutierrez, G., Halverson, N. W., Harrington, N., Henning, J. W., Heymans, C., Holder, G. P., Hollowood, D. L., Holzapfel, W. L., Honscheid, K., Hrubes, J. D., Huang, N., Hubmayr, J., Irwin, K. D., James, D. J., Jeltema, T., Joudaki, S., Khullar, G., Klein, M., Knox, L., Kuropatkin, N., Lee, A. T., Li, D., Lidman, C., Lowitz, A., Maccrann, N., Mahler, G., Maia, M. A. G., Marshall, J. L., Mcdonald, M., Mcmahon, J. J., Melchior, P., Menanteau, F., Meyer, S. S., Miquel, R., Mocanu, L. M., Mohr, J. J., Montgomery, J., Nadolski, A., Natoli, T., Nibarger, J. P., Noble, G., Novosad, V., Padin, S., Palmese, A., Parkinson, D., Patil, S., Paz-Chinchón, F., Plazas, A. A., Pryke, C., Ramachandra, N. S., Reichardt, C. L., Remolina González, J. D., Romer, A. K., Roodman, A., Ruhl, J. E., Rykoff, E. S., Saliwanchik, B. R., Sanchez, E., Saro, A., Sayre, J. T., Schaffer, K. K., Schrabback, T., Serrano, S., Sharon, K., Sievers, C., Smecher, G., Smith, M., Soares-Santos, M., Stark, A. A., Story, K. T., Suchyta, E., Tarle, G., Tucker, C., Vanderlinde, K., Veach, T., Vieira, J. D., Wang, G., Weller, J., Whitehorn, N., Wu, W. L. K., Yefremenko, V., Zhang, Y., National Science Foundation (US), National Aeronautics and Space Administration (US), Department of Energy (US), Ministerio de Ciencia e Innovación (España), Science and Technology Facilities Council (UK), University of Illinois, University of Chicago, Texas A&M University, Financiadora de Estudos e Projetos (Brasil), Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Conselho Nacional das Fundaçôes Estaduais de Amparo à Pesquisa (Brasil), Ministério da Ciência, Tecnologia e Inovação (Brasil), German Research Foundation, Argonne National Laboratory (US), Canadian Institute for Advanced Research, Fonds de Recherche du Québec, Max Planck Society, Alexander von Humboldt Foundation, European Commission, Federal Ministry of Economics and Technology (Germany), Australian Research Council, Australian Astronomical Observatory, California Institute of Technology, and Generalitat de Catalunya
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Physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,010308 nuclear & particles physics ,Strong gravitational lensing ,Cosmic microwave background ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics ,01 natural sciences ,7. Clean energy ,Galaxy ,Cosmology ,Gravitational lens ,Space and Planetary Science ,Large-scale structure of the universe ,0103 physical sciences ,astro-ph.CO ,Cluster (physics) ,Unified Astronomy Thesaurus concepts: Galaxy clusters ,Cluster sampling ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,010303 astronomy & astrophysics ,Galaxy cluster ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Full author list: L. E. Bleem, S. Bocquet, B. Stalder, M. D. Gladders, P. A. R. Ade, S. W. Allen, A. J. Anderson, J. Annis, M. L. N. Ashby, J. E. Austermann, S. Avila, J. S. Avva, M. Bayliss, J. A. Beall, K. Bechtol, A. N. Bender, B. A. Benson, E. Bertin, F. Bianchini, C. Blake, M. Brodwin, D. Brooks, E. Buckley-Geer, D. L. Burke, J. E. Carlstrom, A. Carnero Rosell, M. Carrasco Kind, J. Carretero, C. L. Chang, H. C. Chiang, R. Citron, C. Corbett Moran, M. Costanzi, T. M. Crawford, A. T. Crites, L. N. da Costa, T. de Haan, J. De Vicente, S. Desai, H. T. Diehl, J. P. Dietrich, M. A. Dobbs, T. F. Eifler, W. Everett, B. Flaugher, B. Floyd, J. Frieman, J. Gallicchio, J. García-Bellido, E. M. George, D. W. Gerdes, A. Gilbert, D. Gruen, R. A. Gruendl, J. Gschwend, N. Gupta, G. Gutierrez, N. W. Halverson, N. Harrington, J. W. Henning, C. Heymans, G. P. Holder, D. L. Hollowood, W. L. Holzapfel, K. Honscheid, J. D. Hrubes, N. Huang, J. Hubmayr, K. D. Irwin, D. J. James, T. Jeltema, S. Joudaki, G. Khullar, M. Klein, L. Knox, N. Kuropatkin, A. T. Lee, D. Li, C. Lidman, A. Lowitz, N. MacCrann, G. Mahler, M. A. G. Maia, J. L. Marshall, M. McDonald, J. J. McMahon, P. Melchior, F. Menanteau, S. S. Meyer, R. Miquel, L. M. Mocanu, J. J. Mohr, J. Montgomery, A. Nadolski, T. Natoli, J. P. Nibarger, G. Noble, V. Novosad, S. Padin, A. Palmese, D. Parkinson, S. Patil, F. Paz-Chinchón, A. A. Plazas, C. Pryke, N. S. Ramachandra, C. L. Reichardt, J. D. Remolina González, A. K. Romer, A. Roodman, J. E. Ruhl, E. S. Rykoff, B. R. Saliwanchik, E. Sanchez, A. Saro, J. T. Sayre, K. K. Schaffer, T. Schrabback, S. Serrano, K. Sharon, C. Sievers, G. Smecher, M. Smith, M. Soares-Santos, A. A. Stark, K. T. Story, E. Suchyta, G. Tarle, C. Tucker, K. Vanderlinde, T. Veach, J. D. Vieira, G. Wang, J. Weller, N. Whitehorn, W. L. K. Wu, V. Yefremenko, and Y. Zhang, We describe the observations and resultant galaxy cluster catalog from the 2770 deg2 SPTpol Extended Cluster Survey (SPT-ECS). Clusters are identified via the Sunyaev-Zel'dovich (SZ) effect and confirmed with a combination of archival and targeted follow-up data, making particular use of data from the Dark Energy Survey (DES). With incomplete follow-up we have confirmed as clusters 244 of 266 candidates at a detection significance ξ ≥ 5 and an additional 204 systems at 4 < ξ < 5. The confirmed sample has a median mass of M500c ~ 4.4 ¿ 1014 M☉ h70 -1 and a median redshift of z = 0.49, and we have identified 44 strong gravitational lenses in the sample thus far. Radio data are used to characterize contamination to the SZ signal; the median contamination for confirmed clusters is predicted to be ∼1% of the SZ signal at the ξ > 4 threshold, and 10% of their measured SZ flux. We associate SZ-selected clusters, from both SPT-ECS and the SPT-SZ survey, with clusters from the DES redMaPPer sample, and we find an offset distribution between the SZ center and central galaxy in general agreement with previous work, though with a larger fraction of clusters with significant offsets. Adopting a fixed Planck-like cosmology, we measure the optical richness-SZ mass (l - M) relation and find it to be 28% shallower than that from a weak-lensing analysis of the DES data-a difference significant at the 4σ level-with the relations intersecting at λ = 60. The SPT-ECS cluster sample will be particularly useful for studying the evolution of massive clusters and, in combination with DES lensing observations and the SPT-SZ cluster sample, will be an important component of future cosmological analyses., This work was performed in the context of the South Pole Telescope scientific program. SPT is supported by the National Science Foundation through grant PLR-1248097. Partial support is also provided by the NSF Physics Frontier Center grant PHY-0114422 to the Kavli Institute of Cosmological Physics at the University of Chicago, the Kavli Foundation, and the Gordon and Betty Moore Foundation grant GBMF 947 to the University of Chicago. This work is also supported by the U.S. Department of Energy. PISCO observations are supported by NSF AST-1814719. Work at Argonne National Lab is supported by UChicago Argonne LLC, operator of Argonne National Laboratory (Argonne). Argonne, a U.S. Department of Energy Office of Science Laboratory, is operated under contract No. DE-AC02- 06CH11357. We also acknowledge support from the Argonne Center for Nanoscale Materials. M.G. and L.B. acknowledge partial support from HST-GO-15307.001. B.B. is supported by the Fermi Research Alliance LLC under contract No. De-AC02- 07CH11359 with the U.S. Department of Energy. The CU Boulder group acknowledges support from NSF AST-0956135. The McGill authors acknowledge funding from the Natural Sciences and Engineering Research Council of Canada, Canadian Institute for Advanced Research, and the Fonds de Recherche du Québec Nature et technologies. The UCLA authors acknowledge support from NSF AST-1716965 and CSSI-1835865. The Stanford/SLAC group acknowledges support from the U.S. Department of Energy under contract No. DE-AC02-76SF00515. A.S. is supported by the ERC-StG “ClustersXCosmo” grant agreement 716762 and by the FARE-MIUR grant “ClustersXEuclid” R165SBKTMA. C.H. acknowledges support from the Max Planck Society and the Alexander von Humboldt Foundation, in the framework of the Max Planck-Humboldt Research Award endowed by the Federal Ministry of Education and Research, in addition to support from the European Research Council under grant No. 647112. S.J. acknowledges support from the Beecroft Trust and ERC 693024. T.S. acknowledges support from the German Federal Ministry of Economics and Technology (BMWi) provided through DLR under projects 50 OR 1610 and 50 OR 1803, as well as support from the Deutsche Forschungsgemeinschaft, DFG, under project SCHR 1400/3-1. The Melbourne authors acknowledge support from the Australian Research Council’s Discovery Projects scheme (DP150103208). The 2dFLenS survey is based on data acquired through the Australian Astronomical Observatory, under program A/2014B/008. This work is based in part on observations made with the Spitzer Space Telescope, which is operated by the Jet Propulsion Laboratory, California Institute of Technology, under a contract with NASA. Funding for the DES Projects has been provided by the U.S. Department of Energy, the U.S. National Science Foundation, the Ministry of Science and Education of Spain, the Science and Technology Facilities Council of the United Kingdom, the Higher Education Funding Council for England, the National Center for Supercomputing Applications at the University of Illinois at Urbana-Champaign, the Kavli Institute of Cosmological Physics at the University of Chicago, the Center for Cosmology and Astro-Particle Physics at The Ohio State University, the Mitchell Institute for Fundamental Physics and Astronomy at Texas A&M University, Financiadora de Estudos e Projetos, Fundação Carlos Chagas Filho de Amparo à Pesquisa do Estado do Rio de Janeiro, Conselho Nacional de Desenvolvimento Científico e Tecnológico and the Ministério da Ciência, Tecnologia e Inovação, the Deutsche Forschungsgemeinschaft, and the Collaborating Institutions in the Dark Energy Survey. The Collaborating Institutions are Argonne National Laboratory, the University of California at Santa Cruz, the University of Cambridge, Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas-Madrid, the University of Chicago, University College London, the DES-Brazil Consortium, the University of Edinburgh, the Eidgenössische Technische Hochschule (ETH) Zürich, Fermi National Accelerator Laboratory, the University of Illinois at UrbanaChampaign, the Institut de Ciències de l’Espai (IEEC/CSIC), the Institut de Física d’Altes Energies, Lawrence Berkeley National Laboratory, the Ludwig-Maximilians Universität München and the associated Excellence Cluster Universe, the University of Michigan, the National Optical Astronomy Observatory, the University of Nottingham, The Ohio State University, the University of Pennsylvania, the University of Portsmouth, SLAC National Accelerator Laboratory, Stanford University, the University of Sussex, Texas A&M University, and the OzDES Membership Consortium. Based in part on observations at Cerro Tololo InterAmerican Observatory, National Optical Astronomy Observatory, which is operated by the Association of Universities for Research in Astronomy (AURA) under a cooperative agreement with the National Science Foundation. The DES data management system is supported by the National Science Foundation under grant Nos. AST-1138766 and AST-1536171. The DES participants from Spanish institutions are partially supported by MINECO under grants AYA2015-71825, ESP2015-66861, FPA2015-68048, SEV2016-0588, SEV-2016-0597, and MDM-2015-0509, some of which include ERDF funds from the European Union. IFAE is partially funded by the CERCA program of the Generalitat de Catalunya. Research leading to these results has received funding from the European Research Council under the European Union’s Seventh Framework Program (FP7/2007- 2013), including ERC grant agreements 240672, 291329, and 306478. We acknowledge support from the Brazilian Instituto Nacional de Ciência e Tecnologia (INCT) e-Universe (CNPq grant 465376/2014-2). This manuscript has been authored by Fermi Research Alliance, LLC, under contract No. DE-AC02-07CH11359 with the U.S. Department of Energy, Office of Science, Office of High Energy Physics. The United States Government retains and the publisher, by accepting the article for publication, acknowledges that the United States Government retains a nonexclusive, paid-up, irrevocable, worldwide license to publish or reproduce the published form of this manuscript, or allow others to do so, for United States Government purposes. The Pan-STARRS1 Surveys (PS1) and the PS1 public science archive have been made possible through contributions by the Institute for Astronomy, the University of Hawaii, the Pan-STARRS Project Office, the Max-Planck Society and its participating institutes, the Max Planck Institute for Astronomy, Heidelberg and the Max Planck Institute for Extraterrestrial Physics, Garching, Johns Hopkins University, Durham University, the University of Edinburgh, the Queen’s University Belfast, the Harvard-Smithsonian Center for Astrophysics, the Las Cumbres Observatory Global Telescope Network Incorporated, the National Central University of Taiwan, the Space Telescope Science Institute, the National Aeronautics and Space Administration under grant No. NNX08AR22G issued through the Planetary Science Division of the NASA Science Mission Directorate, the National Science Foundation grant No. AST1238877, the University of Maryland, Eotvos Lorand University (ELTE), the Los Alamos National Laboratory, and the Gordon and Betty Moore Foundation
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25. Insights into Crystal Structure and Diffusion of Biphasic Na2Zn2TeO6
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Julia Wind, David S. Wragg, Ponniah Vajeeston, Federico Bianchini, Helmer Fjellvåg, Christine Pettersen, and Xinyu Li
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Materials science ,Diffusion ,Oxide ,Analytical chemistry ,02 engineering and technology ,Crystal structure ,Electrolyte ,Conductivity ,010402 general chemistry ,021001 nanoscience & nanotechnology ,01 natural sciences ,0104 chemical sciences ,Ion ,Dielectric spectroscopy ,chemistry.chemical_compound ,chemistry ,Phase (matter) ,General Materials Science ,0210 nano-technology - Abstract
The layered oxide Na2Zn2TeO6 is a fast Na+ ion conductor and a suitable candidate for application as a solid-state electrolyte. We present a detailed study on how synthesis temperature and Na-content affect the crystal structure and thus the Na+ ion conductivity of Na2Zn2TeO6. Furthermore, we report for the first time an O'3-type phase for Na2Zn2TeO6. At a synthesis temperature of 900 °C, we obtain a pure P2-type phase, providing peak performance in Na+ ion conductivity. Synthesis temperatures lower than 900 °C produce a series of mixed P2 and O'3-type phases. The O'3 structure can only be obtained as a pure phase by substituting Li on the Zn-sites to increase the Na-content. Thorough analysis of synchrotron data combined with computational modeling indicates that Li enters the Zn sites and, consequently, the amount of Na in the structure increases to balance the charge according to the formula Na2+xZn2-xLixTeO6 (x = 0.2-0.5). Impedance spectroscopy and computational modeling confirm that reducing the amount of the O'3-type phase enhances the Na+ ion mobility.
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26. A Demonstration of Improved Constraints on Primordial Gravitational Waves with Delensing
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Roger O'Brient, John M Kovac, Kirit Karkare, T. Natoli, Kent D. Irwin, A. E. Lowitz, N. Huang, Y. Omori, Victor Buza, Robert I. Citron, S. A. Kernasovskiy, W. L. Holzapfel, Ahmed Soliman, Jeff McMahon, C. Corbett Moran, P. A. R. Ade, Lingzhen Zeng, S. Henderson, W. B. Everett, J. D. Hrubes, Jessica Avva, C. Yu, Calvin B. Netterfield, Lorenzo Moncelsi, J. R. Cheshire, Jason W. Henning, J. A. Grayson, S. Patil, K. K. Schaffer, Elizabeth George, Abigail G. Vieregg, Denis Barkats, V. G. Yefremenko, Jason E. Austermann, N. W. Halverson, A. Cukierman, H. Boenish, B. L. Schmitt, Marion Dierickx, M. Crumrine, K. W. Yoon, Joaquin Vieira, E. Young, G. Hall, Stefan Richter, C. Sievers, Toshiya Namikawa, Graeme Smecher, C. Umilta, D. V. Wiebe, S. Fliescher, T.-L. Chou, H. C. Chiang, Johannes Hubmayr, H. Yang, C. D. Sheehy, Chao-Lin Kuo, Mark Halpern, Christian L. Reichardt, Marius Millea, Joshua Montgomery, S. Kefeli, J. Cornelison, J. J. Bock, Bryan Steinbach, Howard Hui, Gensheng Wang, Andreas Bender, Neil Goeckner-Wald, J. E. Ruhl, Dale Li, C. Tucker, K. G. Megerian, T. M. Crawford, M. A. Dobbs, Mandana Amiri, V. Novosad, R. Schwarz, S. Fatigoni, S. R. Hildebrandt, S. Padin, John E. Carlstrom, E. Bullock, Chao Zhang, T. de Haan, D. C. Goldfinger, John P. Nibarger, Andrew Nadolski, J. Willmert, Carl D. Reintsema, Gene C. Hilton, N. Whitehorn, B. Racine, H. T. Nguyen, A. A. Stark, E. M. Leitch, Alessandro Schillaci, A. D. Turner, E. Karpel, T. Veach, R. Basu Thakur, K. L. Thompson, T. Prouve, A. T. Crites, C. Pryke, C. L. Wong, C. L. Chang, J. Kang, Adam Anderson, Grant Teply, Benjamin Saliwanchik, A. Wandui, Gilbert Holder, A. Manzotti, A. C. Weber, G. I. Noble, Federico Bianchini, Nikhel Gupta, Jeffrey P. Filippini, R. V. Sudiwala, Adrian T. Lee, Bradford Benson, Lloyd Knox, W. L. K. Wu, Colin A. Bischoff, S. S. Meyer, Jason Gallicchio, T. St. Germaine, S. Palladino, L. Duband, J. E. Tolan, Zeeshan Ahmed, L. M. Mocanu, Jake Connors, Kei May Lau, Sarah M. Harrison, Lindsey Bleem, R. W. Ogburn, J. A. Beall, Département des Systèmes Basses Températures (DSBT ), Institut de Recherche Interdisciplinaire de Grenoble (IRIG), Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Direction de Recherche Fondamentale (CEA) (DRF (CEA)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Grenoble Alpes (UGA), Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), SPTpol, BICEP/Keck, BICEP, and Keck
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data analysis method ,satellite: Planck ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Cosmic microwave background ,Cosmic background radiation ,cosmic background radiation: polarization ,FOS: Physical sciences ,cosmic background radiation ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,symbols.namesake ,cosmic rays ,gravitation: lens ,statistical analysis ,Cosmic infrared background ,0103 physical sciences ,Experiments in gravity ,Sample variance ,Planck ,numerical calculations ,010306 general physics ,Astrophysics::Galaxy Astrophysics ,Physics ,polarization ,background ,010308 nuclear & particles physics ,Gravitational wave ,gravitational radiation: primordial ,BICEP ,South Pole Telescope ,Gravitational lens ,B-mode ,infrared ,symbols ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,cosmology ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a constraint on the tensor-to-scalar ratio, $r$, derived from measurements of cosmic microwave background (CMB) polarization $B$-modes with "delensing," whereby the uncertainty on $r$ contributed by the sample variance of the gravitational lensing $B$-modes is reduced by cross-correlating against a lensing $B$-mode template. This template is constructed by combining an estimate of the polarized CMB with a tracer of the projected large-scale structure. The large-scale-structure tracer used is a map of the cosmic infrared background derived from Planck satellite data, while the polarized CMB map comes from a combination of South Pole Telescope, BICEP/Keck, and Planck data. We expand the BICEP/Keck likelihood analysis framework to accept a lensing template and apply it to the BICEP/Keck data set collected through 2014 using the same parametric foreground modelling as in the previous analysis. From simulations, we find that the uncertainty on $r$ is reduced by $\sim10\%$, from $��(r)$= 0.024 to 0.022, which can be compared with a $\sim26\%$ reduction obtained when using a perfect lensing template. Applying the technique to the real data, the constraint on $r$ is improved from $r_{0.05} < 0.090$ to $r_{0.05} < 0.082$ (95\% C.L.). This is the first demonstration of improvement in an $r$ constraint through delensing., 23 pages, 11 figures; match published version
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27. A measurement of the CMB E-mode angular power spectrum at subdegree scales from 670 square degrees of POLARBEAR data
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Osamu Tajima, T. Fujino, Andrew H. Jaffe, Scott Chapman, Eric V. Linder, S. Kikuchi, N. Katayama, D. Leon, Masashi Hazumi, Oliver Jeong, D. Tanabe, Grant Teply, Nicholas Galitzki, Tucker Elleflot, S. Takakura, Christian L. Reichardt, Praween Siritanasak, Josquin Errard, Akito Kusaka, Giulio Fabbian, John Groh, Brian Keating, Federico Bianchini, Ben Westbrook, M. A. O. Aguilar Faúndez, Shunsuke Adachi, Ted Kisner, K. Cheung, Adrian T. Lee, Y. Zhou, C. Tsai, Neil Goeckner-Wald, Frederick Matsuda, Tomotake Matsumura, D. Beck, Kam Arnold, Masaya Hasegawa, S. Takatori, Darcy Barron, Carlo Baccigalupi, L. N. Lowry, Davide Poletti, Clara Vergès, Kevin D. Crowley, G. Hall, M. Navaroli, Haruki Nishino, Yuto Minami, Haruaki Hirose, A. T. P. Pham, Chang Feng, Yuji Chinone, H. El Bouhargani, Y. Segawa, M. A. Dobbs, Daisuke Kaneko, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), APC - Cosmologie, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), Polarbear, Adachi, S, Aguilar Faundez, M, Arnold, K, Baccigalupi, C, Barron, D, Beck, D, Bianchini, F, Chapman, S, Cheung, K, Chinone, Y, Crowley, K, Dobbs, M, El Bouhargani, H, Elleflot, T, Errard, J, Fabbian, G, Feng, C, Fujino, T, Galitzki, N, Goeckner-Wald, N, Groh, J, Hall, G, Hasegawa, M, Hazumi, M, Hirose, H, Jaffe, A, Jeong, O, Kaneko, D, Katayama, N, Keating, B, Kikuchi, S, Kisner, T, Kusaka, A, Lee, A, Leon, D, Linder, E, Lowry, L, Matsuda, F, Matsumura, T, Minami, Y, Navaroli, M, Nishino, H, Pham, A, Poletti, D, Reichardt, C, Segawa, Y, Siritanasak, P, Tajima, O, Takakura, S, Takatori, S, Tanabe, D, Teply, G, Tsai, C, Verges, C, Westbrook, B, Zhou, Y, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP)
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cosmological model ,010504 meteorology & atmospheric sciences ,Cosmic microwave background ,cosmic background radiation: polarization ,detector: noise ,Astrophysics ,cosmic background radiation ,01 natural sciences ,Physical Chemistry ,Atomic ,expansion: multipole ,Cosmology ,Particle and Plasma Physics ,Cosmic microwave background radiation ,Big Bang nucleosynthesis ,polarbear data ,polarization: power spectrum ,010303 astronomy & astrophysics ,helium: primordial ,Physics ,Hubble constant ,symbols ,astro-ph.CO ,power spectrum: angular dependence ,Astronomical and Space Sciences ,Physical Chemistry (incl. Structural) ,Astrophysics - Cosmology and Nongalactic Astrophysics ,satellite: Planck ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,nucleosynthesis: big bang ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astronomy & Astrophysics ,symbols.namesake ,Settore FIS/05 - Astronomia e Astrofisica ,statistical analysis ,Nucleosynthesis ,0103 physical sciences ,Nuclear ,Planck ,cosmic background radiation: power spectrum ,0105 earth and related environmental sciences ,Spectral density ,Molecular ,Astronomy and Astrophysics ,Abundance of the chemical elements ,detector: sensitivity ,Space and Planetary Science ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Hubble's law - Abstract
We report a measurement of the E-mode polarization power spectrum of the cosmic microwave background (CMB) using 150 GHz data taken from July 2014 to December 2016 with the POLARBEAR experiment. We reach an effective polarization map noise level of $32\,\mu\mathrm{K}$-$\mathrm{arcmin}$ across an observation area of 670 square degrees. We measure the EE power spectrum over the angular multipole range $500 \leq \ell, Comment: 15 pages, 5 figures, submitted to ApJ
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- 2020
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28. An Improved Measurement of the Secondary Cosmic Microwave Background Anisotropies from the SPT-SZ + SPTpol Surveys
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T. Veach, Gensheng Wang, Gene C. Hilton, Valentyn Novosad, Jason Gallicchio, Jason E. Austermann, L. M. Mocanu, P. A. R. Ade, Graeme Smecher, A. E. Lowitz, S. Padin, Nikhel Gupta, Robert I. Citron, Johannes Hubmayr, Kent D. Irwin, W. L. Holzapfel, Nathan Whitehorn, C. Corbett Moran, W. L. K. Wu, J. D. Hrubes, Dale Li, John P. Nibarger, A. Nadolski, Volodymyr Yefremenko, S. S. Meyer, Elizabeth George, Jessica Avva, Adam Anderson, Benjamin Saliwanchik, Gilbert Holder, C. Pryke, N. W. Halverson, T. L. Chou, S. Patil, N. Huang, J. T. Sayre, A. Gilbert, A. T. Crites, Carole Tucker, James A. Beall, Adrian T. Lee, R. Williamson, Erik Shirokoff, Joaquin Vieira, Joshua Montgomery, Jason W. Henning, Amy N. Bender, J. E. Ruhl, Keith Vanderlinde, Y. Omori, T. M. Crawford, H. C. Chiang, K. K. Schaffer, Helmuth Spieler, Eric J. Baxter, Lindsey Bleem, Jeff McMahon, Antony A. Stark, John E. Carlstrom, M. A. Dobbs, P. Chaubal, G. I. Noble, Federico Bianchini, T. de Haan, Z. K. Staniszewski, C. Sievers, Christian L. Reichardt, Lloyd Knox, Joseph J. Mohr, T. Natoli, Daniel M. Luong-Van, Bradford Benson, N. L. Harrington, C. L. Chang, Marius Millea, J. Mehl, and W. B. Everett
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Physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,010504 meteorology & atmospheric sciences ,Radio galaxy ,Cosmic microwave background ,Spectral density ,FOS: Physical sciences ,Astronomy and Astrophysics ,Astrophysics ,01 natural sciences ,Spectral line ,South Pole Telescope ,Space and Planetary Science ,Cosmic infrared background ,0103 physical sciences ,Multipole expansion ,010303 astronomy & astrophysics ,Reionization ,Astrophysics - Cosmology and Nongalactic Astrophysics ,0105 earth and related environmental sciences - Abstract
We report new measurements of millimeter-wave power spectra in the angular multipole range $2000 \le \ell \le 11,000$ (angular scales $5^\prime \gtrsim \theta \gtrsim 1^\prime$). By adding 95 and 150\,GHz data from the low-noise 500 deg$^2$ SPTpol survey to the SPT-SZ three-frequency 2540 deg$^2$ survey, we substantially reduce the uncertainties in these bands. These power spectra include contributions from the primary cosmic microwave background, cosmic infrared background, radio galaxies, and thermal and kinematic Sunyaev-Zel'dovich (SZ) effects. The data favor a thermal SZ (tSZ) power at 143\,GHz of $D^{\rm tSZ}_{3000} = 3.42 \pm 0.54~ \mu {\rm K}^2$ and a kinematic SZ (kSZ) power of $D^{\rm kSZ}_{3000} = 3.0 \pm 1.0~ \mu {\rm K}^2$. This is the first measurement of kSZ power at $\ge 3\,\sigma$. We study the implications of the measured kSZ power for the epoch of reionization, finding the duration of reionization to be $\Delta z_{re} = 1.0^{+1.6}_{-0.7}$ ($\Delta z_{re}< 4.1$ at 95% confidence), when combined with our previously published tSZ bispectrum measurement., Comment: Submitted to ApJ, 16 pages. (revised portions of the introduction and description of bandpower estimation)
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- 2020
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29. Galaxy Clusters Selected via the Sunyaev–Zel’dovich Effect in the SPTpol 100-square-degree Survey
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Elizabeth George, A. T. Crites, T. Veach, Amy N. Bender, G. I. Noble, Federico Bianchini, Matt Dobbs, Mark Brodwin, W. B. Everett, N. L. Harrington, S. S. Meyer, K. K. Schaffer, A. E. Lowitz, John E. Carlstrom, Jason E. Austermann, C. L. Chang, T. de Haan, T. M. Crawford, L. M. Mocanu, Lindsey Bleem, Michael McDonald, Dale Li, Joshua Montgomery, Jeff McMahon, Gensheng Wang, Jason Gallicchio, Nathan Whitehorn, Valentine Novosad, Keren Sharon, Graeme Smecher, S. Patil, Michael D. Gladders, Johannes Hubmayr, Robert I. Citron, J. D. Hrubes, Jason W. Henning, A. Saro, Nikhel Gupta, Adrian T. Lee, Adam Anderson, G. Khullar, Benjamin Floyd, Volodymyr Yefremenko, Joaquin Vieira, S. Guns, Steven W. Allen, W. L. K. Wu, J. E. Ruhl, John P. Nibarger, Antony A. Stark, C. Sievers, N. W. Halverson, J. T. Sayre, B. Stalder, Christian L. Reichardt, Kent D. Irwin, Peter A. R. Ade, A. Nadolski, C. Corbett Moran, K. T. Story, K. Vanderlinde, W. L. Holzapfel, Bradford Benson, Sebastian Bocquet, N. Huang, Jessica Avva, A. Gilbert, Stephen Padin, Lloyd Knox, T. Natoli, Gene C. Hilton, James A. Beall, C. Pryke, H. C. Chiang, Carole Tucker, Benjamin Saliwanchik, Gilbert Holder, Huang, N., Bleem, L. E., Stalder, B., Ade, P. A. R., Allen, S. W., Anderson, A. J., Austermann, J. E., Avva, J. S., Beall, J. A., Bender, A. N., Benson, B. A., Bianchini, F., Bocquet, S., Brodwin, M., Carlstrom, J. E., Chang, C. L., Chiang, H. C., Citron, R., Moran, C. Corbett, Crawford, T. M., Crite, A., T., Haan, T. de, Dobbs, M. A., Everett, W., Floyd, B., Gallicchio, J., George, E. M., Gilbert, A., Gladders, M. D., Guns, S., Gupta, N., Halverson, N. W., Harrington, N., Henning, J. W., Hilton, G. C., Holder, G. P., Holzapfel, W. L., Hrubes, J. D., Hubmayr, J., Irwin, K. D., Khullar, G., Knox, L., Lee, A. T., Li, D., Lowitz, A., Mcdonald, M., Mcmahon, J. J., Meyer, S. S., Mocanu, L. M., Montgomery, J., Nadolski, A., Natoli, T., Nibarger, J. P., Noble, G., Novosad, V., Padin, S., Patil, S., Pryke, C., Reichardt, C. L., Ruhl, J. E., Saliwanchik, B. R., Saro, A., Sayre, J. T., Schaffer, K. K., Sharon, K., Sievers, C., Smecher, G., Stark, A. A., Story, K. T., Tucker, C., Vanderlinde, K., Veach, T., Vieira, J. D., Wang, G., Whitehorn, N., Wu, W. L. K., and Yefremenko, V.
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,010504 meteorology & atmospheric sciences ,Infrared ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astronomy & Astrophysics ,Sunyaev–Zel'dovich effect ,01 natural sciences ,Square (algebra) ,0103 physical sciences ,010303 astronomy & astrophysics ,Galaxy cluster ,Astrophysics::Galaxy Astrophysics ,0105 earth and related environmental sciences ,Physics ,Astrophysics::Instrumentation and Methods for Astrophysics ,Astronomy and Astrophysics ,Redshift ,Galaxy ,Square degree ,South Pole Telescope ,Space and Planetary Science ,astro-ph.CO ,Astronomical and Space Sciences ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present a catalog of galaxy cluster candidates detected in 100 square degrees surveyed with the SPTpol receiver on the South Pole Telescope. The catalog contains 89 candidates detected with a signal-to-noise ratio greater than 4.6. The candidates are selected using the Sunyaev-Zel'dovich effect at 95 and 150 GHz. Using both space- and ground-based optical and infrared telescopes, we have confirmed 81 candidates as galaxy clusters. We use these follow-up images and archival images to estimate photometric redshifts for 66 galaxy clusters and spectroscopic observations to obtain redshifts for 13 systems. An additional 2 galaxy clusters are confirmed using the overdensity of near-infrared galaxies only, and are presented without redshifts. We find that 15 candidates (18% of the total sample) are at redshift of $z \geq 1.0$, with a maximum confirmed redshift of $z_{\rm{max}} = 1.38 \pm 0.10$. We expect this catalog to contain every galaxy cluster with $M_{500c} > 2.6 \times 10^{14} M_\odot h^{-1}_{70}$ and $z > 0.25$ in the survey area. The mass threshold is approximately constant above $z = 0.25$, and the complete catalog has a median mass of approximately $ M_{500c} = 2.7 \times 10^{14} M_\odot h^{-1}_{70}$. Compared to previous SPT works, the increased depth of the millimeter-wave data (11.2 and 6.5 $��$K-arcmin at 95 and 150 GHz, respectively) makes it possible to find more galaxy clusters at high redshift and lower mass., 21 pages, 7 figures, associated data available at http://pole.uchicago.edu/public/data/sptsz-clusters. V2 was accepted to the AJ, and includes minor changes requested by the reviewer
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- 2020
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30. Constraints on Cosmological Parameters from the 500 deg$^2$ SPTpol Lensing Power Spectrum
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Elizabeth George, J. D. Hrubes, A. E. Lowitz, Y. Omori, K. Vanderlinde, G. I. Noble, N. W. Halverson, S. S. Meyer, Valentine Novosad, Federico Bianchini, Gensheng Wang, Dale Li, G. P. Holder, J. T. Sayre, C. L. Chang, Jason W. Henning, J. A. Beall, V. G. Yefremenko, T. Natoli, Adrian T. Lee, Lloyd Knox, L. M. Mocanu, C. Corbett Moran, Matt Dobbs, J. E. Ruhl, Carole Tucker, J. Hubmayr, Jessica Avva, Amy N. Bender, J. E. Austermann, K. T. Story, N. Huang, T. M. Crawford, Stephen Padin, Benjamin Saliwanchik, K. K. Schaffer, G. Simard, Graeme Smecher, A. J. Gilbert, Adam Anderson, H. C. Chiang, J. D. Vieira, Jeff McMahon, Robert I. Citron, W. L. K. Wu, W. L. Holzapfel, Nathan Whitehorn, Todd J. Veach, Bradford Benson, Nikhel Gupta, M. Millea, Joshua Montgomery, C. Pryke, C. Sievers, Christian L. Reichardt, N. L. Harrington, Kent D. Irwin, P. A. R. Ade, W. B. Everett, S. Patil, Jason Gallicchio, John E. Carlstrom, A. T. Crites, A. A. Stark, Lindsey Bleem, P. Chaubal, A. Manzotti, Gene C. Hilton, T. de Haan, John P. Nibarger, Andrew Nadolski, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and SPT
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Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,010504 meteorology & atmospheric sciences ,Cosmic microwave background ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astronomy & Astrophysics ,01 natural sciences ,Omega ,Atomic ,Physical Chemistry ,Spectral line ,symbols.namesake ,Particle and Plasma Physics ,0103 physical sciences ,Nuclear ,Planck ,010303 astronomy & astrophysics ,0105 earth and related environmental sciences ,Physics ,Astrophysics::Instrumentation and Methods for Astrophysics ,Sigma ,Spectral density ,Molecular ,Astronomy and Astrophysics ,Space and Planetary Science ,symbols ,astro-ph.CO ,Baryon acoustic oscillations ,Neutrino ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Astronomical and Space Sciences ,Physical Chemistry (incl. Structural) ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present cosmological constraints based on the cosmic microwave background (CMB) lensing potential power spectrum measurement from the recent 500 deg$^2$ SPTpol survey, the most precise CMB lensing measurement from the ground to date. We fit a flat $\Lambda$CDM model to the reconstructed lensing power spectrum alone and in addition with other data sets: baryon acoustic oscillations (BAO) as well as primary CMB spectra from Planck and SPTpol. The cosmological constraints based on SPTpol and Planck lensing band powers are in good agreement when analysed alone and in combination with Planck full-sky primary CMB data. With weak priors on the baryon density and other parameters, the CMB lensing data alone provide a 4\% constraint on $\sigma_8\Omega_m^{0.25} = 0.0593 \pm 0.025$.. Jointly fitting with BAO data, we find $\sigma_8=0.779 \pm 0.023$, $\Omega_m = 0.368^{+0.032}_{-0.037}$, and $H_0 = 72.0^{+2.1}_{-2.5}\,\text{km}\,\text{s}^{-1}\,\text{Mpc}^{-1} $, up to $2\,\sigma$ away from the central values preferred by Planck lensing + BAO. However, we recover good agreement between SPTpol and Planck when restricting the analysis to similar scales. We also consider single-parameter extensions to the flat $\Lambda$CDM model. The SPTpol lensing spectrum constrains the spatial curvature to be $\Omega_K = -0.0007 \pm 0.0025$ and the sum of the neutrino masses to be $\sum m_{\nu} < 0.23$ eV at 95\% C.L. (with Planck primary CMB and BAO data), in good agreement with the Planck lensing results. With the differences in the $S/N$ of the lensing modes and the angular scales covered in the lensing spectra, this analysis represents an important independent check on the full-sky Planck lensing measurement., Comment: 16 pages, 8 figures, 3 tables, updated to match the version published on ApJ
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- 2019
31. A first-principle investigation of the Li diffusion mechanism in the super-ionic conductor lithium orthothioborate Li3BS3 structure
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Ponniah Vajeeston, Helmer Fjellvåg, and Federico Bianchini
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Materials science ,Mechanical Engineering ,Ionic bonding ,chemistry.chemical_element ,02 engineering and technology ,Activation energy ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,01 natural sciences ,0104 chemical sciences ,Ion ,Conductor ,chemistry ,Mechanics of Materials ,Chemical physics ,General Materials Science ,Lithium ,Density functional theory ,Diffusion (business) ,0210 nano-technology ,Electrical conductor - Abstract
The research of superior ionic conductors is a very active field. Identifying such materials would allow for the design of improved solid-state Li-ion batteries, solving the safety hazard posed by the liquid electrolytes and improving the electrochemical stability and thus the energy efficiency. In this work, we study lithium orthothioborate Li3BS3 by means of first-principle atomistic calculations based on density functional theory. This material is a very promising super ion conductor candidate, as it is a layered compound based on a deformed body-centred structure of the anion sublattice. The minimum energy paths for the diffusion of the lithium ions are identified, and the activation energy are evaluated using the nudged elastic band method. A very fast 1D diffusive channel is found, contained in a Li-rich layer, with an activation energy below 0.1 eV. The other paths connecting these layers and extending the mobility of lithium to the whole structure are found to have activation barriers of 0.25 eV or lower. This bottleneck corresponds to a diffusion coefficient of the order of 10 - 6 cm2 s−1, thus characterising lithium orthothioborate as an excellent ionic conductor.
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- 2018
32. A first principle comparative study of the ionic diffusivity in LiAlO2 and NaAlO2 polymorphs for solid-state battery applications
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Federico Bianchini, Helmer Fjellvåg, and Ponniah Vajeeston
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Materials science ,General Physics and Astronomy ,Ionic bonding ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Thermal diffusivity ,01 natural sciences ,0104 chemical sciences ,Tetragonal crystal system ,Chemical physics ,Vacancy defect ,Ionic conductivity ,Solid-state battery ,Orthorhombic crystal system ,Density functional theory ,Physical and Theoretical Chemistry ,0210 nano-technology - Abstract
Lithium aluminates are attracting increasing attention as battery materials. They are typically used for the coating of electrodes. The diffusive properties of the equilibrium tetragonal phase (γ) are well understood from both an experimental and a theoretical perspective, and the major diffusive mechanism is recognised to be vacancy hopping between neighbouring sites. Investigations of this type are however not reported for other, high-pressure LiAlO2 phases. Moreover, the ionic diffusivity of the Na-based aluminates, manifesting a similar polymorphism to LiAlO2, has never been studied using atomistic techniques. In this work, we address these points, by presenting a comparative density functional theory-based study of these materials, describing the structural properties of the various phases, and evaluating the activation energies for single vacancy hops. While LiAlO2 exhibits a poor ionic conductivity due to a significant degree of covalency of the Al-O bonding, orthorhombic β-NaAlO2 exhibits a significantly lower diffusion barrier. This feature cannot be explained only in terms of the larger equilibrium volume, as the same trend is not observed for the high-pressure trigonal α-LiAlO2 and α-NaAlO2. We utilise here various electronic-structure tools to verify the lower degree of covalency of the Na-O bonds. The electron localisation function, in particular, is shown to be intrinsically correlated to the diffusion pathways of Li and Na ions, and its variation along the path is a qualitative measure of ionic conductivity.
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- 2018
33. First-principles study of the structural stability and electrochemical properties of Na2MSiO4 (M = Mn, Fe, Co and Ni) polymorphs
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Federico Bianchini, Ponniah Vajeeston, and Helmer Fjellvåg
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Doping ,General Physics and Astronomy ,chemistry.chemical_element ,02 engineering and technology ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Electrochemistry ,01 natural sciences ,0104 chemical sciences ,Crystallography ,Nickel ,chemistry ,Impurity ,Chemical physics ,Formula unit ,Ionic conductivity ,Density functional theory ,Physical and Theoretical Chemistry ,0210 nano-technology ,Ground state - Abstract
Sodium orthosilicates Na2MSiO4 (M = Mn, Fe, Co and Ni) have attracted much attention due to the possibility of exchanging two electrons per formula unit. They are also found to exhibit great structural stability due to a diamond-like arrangement of tetrahedral groups. In this work, we have systematically studied the possible polymorphism of these compounds by means of density functional theory, optimising the structure of a number of systems with different group symmetries. The ground state is found to be Pc-symmetric for all the considered M = Mn, Fe, Co, Ni, and several similar structures exhibiting different symmetries coexist within a 0.3 eV energy window from this structural minimum. The intercalation/deintercalation potential is calculated for varying transition metal atoms M. Iron sodium orthosilicates, attractive due to the natural abundance of both materials, exhibit a low voltage, which can be enhanced by doping with nickel. The diffusion pathways for Na atoms are discussed, and the relevant barriers are calculated using the nudged elastic band method on top of DFT calculations. Also in this case, nickel impurities would improve the material performances by lowering the barrier heights. Notably, the ionic conductivity is found to be systematically larger with respect to the case of lithium orthosilicates, due to a larger spacing between atomic layers and to the non-directional bonding between Na and the neighbouring atoms. Overall, the great structural stability of the material together with the low barriers for Na diffusion indicates this class of materials as good candidates for modern battery technologies.
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- 2017
34. Internal delensing of cosmic microwave background polarization B-modes with the POLARBEAR experiment
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Kam Arnold, Grant Teply, D. Leon, R. Stompor, Neil Goeckner-Wald, Yuji Chinone, D. Beck, J. Borrill, H. El Bouhargani, Kevin T. Crowley, S. Takatori, Toshiya Namikawa, M. A. O. Aguilar Faúndez, Max Silva-Feaver, M. Navaroli, Christian L. Reichardt, J. Peloton, Tucker Elleflot, Josquin Errard, Darcy Barron, Davide Poletti, Osamu Tajima, K. Cheung, C. Verges, L. N. Lowry, N. Katayama, Federico Bianchini, Eric V. Linder, Giulio Fabbian, Praween Siritanasak, Yuto Minami, Brian Keating, Julien Carron, L. Howe, Shunsuke Adachi, Tomotake Matsumura, A. T. P. Pham, Y. Segawa, Carlo Baccigalupi, Aamir Ali, Akito Kusaka, Masaya Hasegawa, Frederick Matsuda, Aaron Lee, Chang Feng, Giuseppe Puglisi, Charles A. Hill, T. Fujino, Y. Akiba, D. Tanabe, S. Kikuchi, H. Nishino, Masashi Hazumi, Blake D. Sherwin, AstroParticule et Cosmologie (APC (UMR_7164)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Laboratoire de l'Accélérateur Linéaire (LAL), Université Paris-Sud - Paris 11 (UP11)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), POLARBEAR, Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Sud - Paris 11 (UP11), Adachi, S, Aguilar Faundez, M, Akiba, Y, Ali, A, Arnold, K, Baccigalupi, C, Barron, D, Beck, D, Bianchini, F, Borrill, J, Carron, J, Cheung, K, Chinone, Y, Crowley, K, El Bouhargani, H, Elleflot, T, Errard, J, Fabbian, G, Feng, C, Fujino, T, Goeckner-Wald, N, Hasegawa, M, Hazumi, M, Hill, C, Howe, L, Katayama, N, Keating, B, Kikuchi, S, Kusaka, A, Lee, A, Leon, D, Linder, E, Lowry, L, Matsuda, F, Matsumura, T, Minami, Y, Namikawa, T, Navaroli, M, Nishino, H, Peloton, J, Pham, A, Poletti, D, Puglisi, G, Reichardt, C, Segawa, Y, Sherwin, B, Silva-Feaver, M, Siritanasak, P, Stompor, R, Tajima, O, Takatori, S, Tanabe, D, Teply, G, Verges, C, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), APC - Cosmologie, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
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Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Cosmic Microwave Background Polarization ,Cosmic microwave background ,FOS: Physical sciences ,General Physics and Astronomy ,cosmic background radiation: polarization ,General Relativity and Quantum Cosmology (gr-qc) ,Gravitation and Astrophysics ,01 natural sciences ,General Relativity and Quantum Cosmology ,B-mode: primordial ,Settore FIS/05 - Astronomia e Astrofisica ,QB0980 ,0103 physical sciences ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,010306 general physics ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,QC ,QB ,Physics ,Settore FIS/05 ,Polarization (waves) ,inflation: model ,Computational physics ,POLARBEAR Experiment ,[PHYS.GRQC]Physics [physics]/General Relativity and Quantum Cosmology [gr-qc] ,Instrumentation and Methods for Astrophysics ,Variance reduction ,Cosmology and Nongalactic Astrophysics ,Astrophysics - Instrumentation and Methods for Astrophysics ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Using only cosmic microwave background polarization data from the POLARBEAR experiment, we measure $B$-mode polarization delensing on subdegree scales at more than $5\sigma$ significance. We achieve a 14% $B$-mode power variance reduction, the highest to date for internal delensing, and improve this result to 2% by applying for the first time an iterative maximum a posteriori delensing method. Our analysis demonstrates the capability of internal delensing as a means of improving constraints on inflationary models, paving the way for the optimal analysis of next-generation primordial $B$-mode experiments., Comment: Matches version published in Physical Review Letters
- Published
- 2019
35. A Measurement of the Cosmic Microwave Background Lensing Potential and Power Spectrum from 500 deg2 of SPTpol Temperature and Polarization Data
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T. de Haan, John E. Carlstrom, W. L. K. Wu, Todd J. Veach, K. Vanderlinde, Benjamin Saliwanchik, John P. Nibarger, Andrew Nadolski, A. J. Gilbert, Adam Anderson, J. E. Ruhl, L. M. Mocanu, Carole Tucker, C. Sievers, S. S. Meyer, Peter A. R. Ade, Graeme Smecher, Jeff McMahon, Adrian T. Lee, Lloyd Knox, K. T. Story, Jason W. Henning, C. Pryke, Antony A. Stark, J. E. Austermann, A. E. Lowitz, A. T. Crites, Y. Omori, N. L. Harrington, Bradford Benson, T. Natoli, Zhen Hou, W. B. Everett, Nathan Whitehorn, C. Corbett Moran, Valentine Novosad, M. Millea, J. A. Beall, Elizabeth George, C. L. Chang, Nikhel Gupta, S. Patil, C. L. Reichardt, G. I. Noble, J. T. Sayre, Federico Bianchini, A. Manzotti, Matt Dobbs, Lindsey Bleem, V. G. Yefremenko, Jessica Avva, Gene C. Hilton, Kent D. Irwin, W. L. Holzapfel, G. P. Holder, T. M. Crawford, Stephen Padin, Gensheng Wang, Joshua Montgomery, N. W. Halverson, Joaquin Vieira, J. D. Hrubes, Amy N. Bender, K. K. Schaffer, Jason Gallicchio, J. Hubmayr, Robert I. Citron, Dale Li, N. Huang, G. Simard, H. C. Chiang, Institut d'Astrophysique de Paris (IAP), and Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)
- Subjects
cosmological model ,data analysis method ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,satellite: Planck ,010504 meteorology & atmospheric sciences ,Cosmic microwave background ,cosmic background radiation [cosmology] ,multipole ,FOS: Physical sciences ,cosmic background radiation: polarization ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astronomy & Astrophysics ,power spectrum ,Atomic ,Physical Chemistry ,01 natural sciences ,symbols.namesake ,Particle and Plasma Physics ,statistical analysis ,gravitation: lens ,0103 physical sciences ,Nuclear ,Planck ,numerical calculations ,010303 astronomy & astrophysics ,0105 earth and related environmental sciences ,Physics ,Molecular ,Estimator ,Spectral density ,Astronomy and Astrophysics ,Polarization (waves) ,3. Good health ,cosmic background radiation: temperature ,South Pole Telescope ,Amplitude ,Space and Planetary Science ,astro-ph.CO ,symbols ,High Energy Physics::Experiment ,large-scale structure of the universe ,Multipole expansion ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Astronomical and Space Sciences ,Astrophysics - Cosmology and Nongalactic Astrophysics ,Physical Chemistry (incl. Structural) - Abstract
We present a measurement of the cosmic microwave background (CMB) lensing potential using 500 deg$^2$ of 150 GHz data from the SPTpol receiver on the South Pole Telescope. The lensing potential is reconstructed with signal-to-noise per mode greater than unity at lensing multipoles $L \lesssim 250$, using a quadratic estimator on a combination of CMB temperature and polarization maps. We report measurements of the lensing potential power spectrum in the multipole range of $100< L < 2000$ from sets of temperature-only, polarization-only, and minimum-variance estimators. We measure the lensing amplitude by taking the ratio of the measured spectrum to the expected spectrum from the best-fit $\Lambda$CDM model to the $\textit{Planck}$ 2015 TT+lowP+lensing dataset. For the minimum-variance estimator, we find $A_{\rm{MV}} = 0.944 \pm 0.058{\rm (Stat.)}\pm0.025{\rm (Sys.)}$; restricting to only polarization data, we find $A_{\rm{POL}} = 0.906 \pm 0.090 {\rm (Stat.)} \pm 0.040 {\rm (Sys.)}$. Considering statistical uncertainties alone, this is the most precise polarization-only lensing amplitude constraint to date (10.1 $\sigma$), and is more precise than our temperature-only constraint. We perform null tests and consistency checks and find no evidence for significant contamination., Comment: 18 pages, 8 figures; updated to match published version
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- 2019
36. A Measurement of the Degree Scale CMB B-mode Angular Power Spectrum with POLARBEAR
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Julien Carron, M. A. Dobbs, C. Tsai, Dominic Beck, D. Leon, Ted Kisner, Aashrita Mangu, D. Boettger, Christian L. Reichardt, A. T. P. Pham, Kam Arnold, Akito Kusaka, Nicoletta Krachmalnicoff, T. Hamada, John Groh, S. Beckman, Josquin Errard, Ben Westbrook, Nathan Stebor, Neil Goeckner-Wald, Reijo Keskitalo, Daisuke Kaneko, Greg Jaehnig, Kevin T. Crowley, S. Takatori, Masaya Hasegawa, D. Tanabe, Tucker Elleflot, Giulio Fabbian, L. Howe, A. Cukierman, T. Fujino, Y. Zhou, S. Takakura, Eric V. Linder, Julian Borrill, N. Katayama, Yuki Inoue, Davide Poletti, Praween Siritanasak, Haruki Nishino, Yuto Minami, Yuji Chinone, Y. Segawa, H. El Bouhargani, Osamu Tajima, Aritoki Suzuki, N. W. Halverson, Darcy Barron, Masashi Hazumi, L. N. Lowry, G. Hall, Frederick Matsuda, Federico Bianchini, Scott Chapman, M. Navaroli, R. Stompor, Nicholas Galitzki, Clara Vergès, Maximiliano Silva-Feaver, Oliver Jeong, M. A. O. Aguilar Faúndez, Grant Teply, Brian Keating, Shunsuke Adachi, S. Kikuchi, K. Cheung, Adrian T. Lee, Giuseppe Puglisi, Charles A. Hill, Chang Feng, C. Baccigalupi, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), POLARBEAR, Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Observatoire de Paris, PSL Research University (PSL)-PSL Research University (PSL)-Université Paris Diderot - Paris 7 (UPD7), Adachi, S, Aguilar Faundez, M, Arnold, K, Baccigalupi, C, Barron, D, Beck, D, Beckman, S, Bianchini, F, Boettger, D, Borrill, J, Carron, J, Chapman, S, Cheung, K, Chinone, Y, Crowley, K, Cukierman, A, Dobbs, M, Bouhargani, H, Elleflot, T, Errard, J, Fabbian, G, Feng, C, Fujino, T, Galitzki, N, Goeckner-Wald, N, Groh, J, Hall, G, Halverson, N, Hamada, T, Hasegawa, M, Hazumi, M, Hill, C, Howe, L, Inoue, Y, Jaehnig, G, Jeong, O, Kaneko, D, Katayama, N, Keating, B, Keskitalo, R, Kikuchi, S, Kisner, T, Krachmalnicoff, N, Kusaka, A, Lee, A, Leon, D, Linder, E, Lowry, L, Mangu, A, Matsuda, F, Minami, Y, Navaroli, M, Nishino, H, Pham, A, Poletti, D, Puglisi, G, Reichardt, C, Segawa, Y, Silva-Feaver, M, Siritanasak, P, Stebor, N, Stompor, R, Suzuki, A, Tajima, O, Takakura, S, Takatori, S, Tanabe, D, Teply, G, Tsai, C, Verges, C, Westbrook, B, Zhou, Y, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité), APC - Cosmologie, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)
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Cosmic microwave background radiation ,Cosmic inflation ,Cosmology ,Observational cosmology ,cosmological model ,010504 meteorology & atmospheric sciences ,Cosmic microwave background ,Astrophysics ,01 natural sciences ,Atomic ,Physical Chemistry ,Spectral line ,thermal ,Cosmic microwave background radiationCosmic inflationCosmologyObservational cosmology ,Particle and Plasma Physics ,polarization: power spectrum ,010303 astronomy & astrophysics ,media_common ,Physics ,Settore FIS/05 ,Polarization (waves) ,symbols ,astro-ph.CO ,power spectrum: angular dependence ,Astronomical and Space Sciences ,Physical Chemistry (incl. Structural) ,Astrophysics - Cosmology and Nongalactic Astrophysics ,data analysis method ,noise ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,satellite: Planck ,media_common.quotation_subject ,FOS: Physical sciences ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astronomy & Astrophysics ,frequency: high ,cosmic background radiation: B-mode ,symbols.namesake ,Settore FIS/05 - Astronomia e Astrofisica ,gravitation: lens ,statistical analysis ,0103 physical sciences ,Nuclear ,Planck ,cosmic background radiation: power spectrum ,inflation ,0105 earth and related environmental sciences ,gravitational radiation: primordial ,gravitational radiation ,Spectral density ,Molecular ,Astronomy and Astrophysics ,Square degree ,detector: sensitivity ,Space and Planetary Science ,Sky ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] - Abstract
We present a measurement of the $B$-mode polarization power spectrum of the cosmic microwave background (CMB) using taken from July 2014 to December 2016 with the POLARBEAR experiment. The CMB power spectra are measured using observations at 150 GHz with an instantaneous array sensitivity of $\mathrm{NET}_\mathrm{array}=23\, \mu \mathrm{K} \sqrt{\mathrm{s}}$ on a 670 square degree patch of sky centered at (RA, Dec)=($+0^\mathrm{h}12^\mathrm{m}0^\mathrm{s},-59^\circ18^\prime$). A continuously rotating half-wave plate is used to modulate polarization and to suppress low-frequency noise. We achieve $32\,\mu\mathrm{K}$-$\mathrm{arcmin}$ effective polarization map noise with a knee in sensitivity of $\ell = 90$, where the inflationary gravitational wave signal is expected to peak. The measured $B$-mode power spectrum is consistent with a $\Lambda$CDM lensing and single dust component foreground model over a range of multipoles $50 \leq \ell \leq 600$. The data disfavor zero $C_\ell^{BB}$ at $2.2\sigma$ using this $\ell$ range of POLARBEAR data alone. We cross-correlate our data with Planck high frequency maps and find the low-$\ell$ $B$-mode power in the combined dataset to be consistent with thermal dust emission. We place an upper limit on the tensor-to-scalar ratio $r < 0.90$ at 95% confidence level after marginalizing over foregrounds.
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- 2019
37. Deployment of Polarbear-2A
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Chang Feng, Radek Stompor, Takayuki Tomaru, Rolando Dünner, Josquin Errard, D. Tanabe, Praween Siritanasak, N. Stebor, Julien Carron, D. Leon, Davide Poletti, K. Cheung, C. Tsai, S. Takakura, Grant Teply, Yuto Minami, Yuki Inoue, Stephen M. Feeney, Yuji Chinone, Frederick Matsuda, D. Beck, Akito Kusaka, Y. Akiba, A. Suzuki, Nicoletta Krachmalnicoff, Adrian T. Lee, M. Aguilar Faúndez, J. Peloton, Colin Ross, Osamu Tajima, D. Boettger, B. Westbrook, A. T. P. Pham, M. Navaroli, N. W. Halverson, Y. Zhou, Federico Bianchini, A. Cukierman, Aashrita Mangu, Nobuhiko Katayama, T. Hamada, Tucker Elleflot, Y. Segawa, Masaya Hasegawa, G. Hall, Julian Borrill, Peter A. R. Ade, Eric V. Linder, Giulio Fabbian, H. Nishino, G. Jaehnig, Giuseppe Puglisi, Charles A. Hill, Shunsuke Adachi, S. Takatori, L. Howe, A. J. Gilbert, H. El-Bouhargani, Christian L. Reichardt, Kam Arnold, John Groh, Masashi Hazumi, Neil Goeckner-Wald, Nicholas Galitzki, S. Beckman, Brian Keating, M. A. Dobbs, Carlo Baccigalupi, Clara Vergès, Theodore Kisner, Reijo Keskitalo, Daisuke Kaneko, T. Fujino, S. Kikuchi, Darcy Barron, L. N. Lowry, Scott Chapman, Maximiliano Silva-Feaver, Oliver Jeong, Kevin T. Crowley, AstroParticule et Cosmologie (APC (UMR_7164)), Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Kaneko, D, Adachi, S, Ade, P, Aguilar Faundez, M, Akiba, Y, Arnold, K, Baccigalupi, C, Barron, D, Beck, D, Beckman, S, Bianchini, F, Boettger, D, Borrill, J, Carron, J, Chapman, S, Cheung, K, Chinone, Y, Crowley, K, Cukierman, A, Dobbs, M, Dunner, R, El-Bouhargani, H, Elleflot, T, Errard, J, Fabbian, G, Feeney, S, Feng, C, Fujino, T, Galitzki, N, Gilbert, A, Goeckner-Wald, N, Groh, J, Hall, G, Halverson, N, Hamada, T, Hasegawa, M, Hazumi, M, Hill, C, Howe, L, Inoue, Y, Jaehnig, G, Jeong, O, Katayama, N, Keating, B, Keskitalo, R, Kikuchi, S, Kisner, T, Krachmalnicoff, N, Kusaka, A, Lee, A, Leon, D, Linder, E, Lowry, L, Mangu, A, Matsuda, F, Minami, Y, Navaroli, M, Nishino, H, Peloton, J, Pham, A, Poletti, D, Puglisi, G, Reichardt, C, Ross, C, Segawa, Y, Silva-Feaver, M, Siritanasak, P, Stebor, N, Stompor, R, Suzuki, A, Tajima, O, Takakura, S, Takatori, S, Tanabe, D, Teply, G, Tomaru, T, Tsai, C, Verges, C, Westbrook, B, Zhou, Y, and Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Centre National de la Recherche Scientifique (CNRS)-Université Paris Cité (UPCité)
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[PHYS]Physics [physics] ,Settore FIS/05 ,Gravitational wave ,Cosmic microwave background ,Millimeter wave ,First light ,CMB ,Condensed Matter Physics ,7. Clean energy ,01 natural sciences ,Atomic and Molecular Physics, and Optics ,010305 fluids & plasmas ,Microwave emission ,Settore FIS/05 - Astronomia e Astrofisica ,TES bolometer ,Planet ,Software deployment ,0103 physical sciences ,Extremely high frequency ,B-mode polarization ,General Materials Science ,[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det] ,010306 general physics ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Remote sensing - Abstract
International audience; Polarbear-2A is the first of three receivers in the Simons array, a cosmic microwave background experiment located on the Atacama Plateau in Chile. Polarbear-2A was deployed and achieved the first light in January 2019 by mapping the microwave emission from planet observations. Commissioning work is underway to prepare the receiver for science observations.
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- 2019
38. A Detection of CMB-Cluster Lensing using Polarization Data from SPTpol
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Benjamin Saliwanchik, C. L. Chang, V. G. Yefremenko, Sebastian Bocquet, C. Corbett Moran, Devon L. Hollowood, J. A. Beall, N. Huang, Jessica Avva, A. E. Lowitz, Adrian T. Lee, Lloyd Knox, Peter A. R. Ade, Nikhel Gupta, J. E. Ruhl, Yanxi Zhang, Pablo Fosalba, Stephen Padin, Marcelle Soares-Santos, J. D. Hrubes, G. Gutierrez, Elizabeth George, Tesla E. Jeltema, Joseph J. Mohr, K. Vanderlinde, Gene C. Hilton, A. Roodman, Tommaso Giannantonio, K. T. Story, Valentine Novosad, Srinivasan Raghunathan, David Brooks, M. E. C. Swanson, H. C. Chiang, Robert I. Citron, Bradford Benson, Gensheng Wang, Jason Gallicchio, N. W. Halverson, Antony A. Stark, Chang Feng, T. Natoli, G. P. Holder, T. Veach, A. A. Plazas, M. Costanzi, C. Sievers, Shantanu Desai, Michael Schubnell, Jason W. Henning, D. L. Burke, Dale Li, Carole Tucker, Mathew Smith, Christian L. Reichardt, B. Flaugher, Jason E. Austermann, Ramon Miquel, S. S. Meyer, M. A. G. Maia, N. L. Harrington, John E. Carlstrom, Matt Dobbs, Peter Melchior, S. Allam, Robert A. Gruendl, L. M. Mocanu, G. I. Noble, Joaquin Vieira, Federico Bianchini, Graeme Smecher, J. P. Dietrich, Nathan Whitehorn, I. Sevilla-Noarbe, Juan Garcia-Bellido, T. McClintock, N. Kuropatkin, Eduardo Rozo, J. De Vicente, T. M. Crawford, Peter Doel, J. T. Sayre, T. N. Varga, E. Suchyta, August E. Evrard, Amy N. Bender, L. N. da Costa, A. K. Romer, H. T. Diehl, Felipe Menanteau, David Bacon, W. L. K. Wu, J. Carretero, K. K. Schaffer, Jennifer L. Marshall, M. Carrasco Kind, Joshua Montgomery, Johannes Hubmayr, Gregory Tarle, J. Gschwend, Joshua A. Frieman, David Rapetti, A. J. Gilbert, S. Serrano, Adam Anderson, Enrique Gaztanaga, Jeff McMahon, K. Honscheid, Eli S. Rykoff, Eric J. Baxter, Vinu Vikram, R. L. C. Ogando, Marcos Lima, T. de Haan, V. Scarpine, S. Patil, John P. Nibarger, Andrew Nadolski, A. Carnero Rosell, Kent D. Irwin, W. L. Holzapfel, Ofer Lahav, S. Everett, C. Pryke, Lindsey Bleem, F. J. Castander, E. J. Sanchez, Santiago Avila, A. T. Crites, Raghunathan, S., Patil, S., Baxter, E., Benson, B. A., Bleem, L. E., Crawford, T. M., Holder, G. P., Mcclintock, T., Reichardt, C. L., Varga, T. N., Whitehorn, N., Ade, P. A. R., Allam, S., Anderson, A. J., Austermann, J. E., Avila, S., Avva, J. S., Bacon, D., Beall, J. A., Bender, A. N., Bianchini, F., Bocquet, S., Brooks, D., Burke, D. L., Carlstrom, J. E., Carretero, J., Castander, F. J., Chang, C. L., Chiang, H. C., Citron, R., Costanzi, M., Crites, A. T., Da Costa, L. N., Desai, S., Diehl, H. T., Dietrich, J. P., Dobbs, M. A., Doel, P., Everett, S., Evrard, A. E., Feng, C., Flaugher, B., Fosalba, P., Frieman, J., Gallicchio, J., Garcia-Bellido, J., Gaztanaga, E., George, E. M., Giannantonio, T., Gilbert, A., Gruendl, R. A., Gschwend, J., Gupta, N., Gutierrez, G., De Haan, T., Halverson, N. W., Harrington, N., Henning, J. W., Hilton, G. C., Hollowood, D. L., Holzapfel, W. L., Honscheid, K., Hrubes, J. D., Huang, N., Hubmayr, J., Irwin, K. D., Jeltema, T., Kind, M. C., Knox, L., Kuropatkin, N., Lahav, O., Lee, A. T., Li, D., Lima, M., Lowitz, A., Maia, M. A. G., Marshall, J. L., Mcmahon, J. J., Melchior, P., Menanteau, F., Meyer, S. S., Miquel, R., Mocanu, L. M., Mohr, J. J., Montgomery, J., Moran, C. C., Nadolski, A., Natoli, T., Nibarger, J. P., Noble, G., Novosad, V., Ogando, R. L. C., Padin, S., Plazas, A. A., Pryke, C., Rapetti, D., Romer, A. K., Roodman, A., Rosell, A. C., Rozo, E., Ruhl, J. E., Rykoff, E. S., Saliwanchik, B. R., Sanchez, E., Sayre, J. T., Scarpine, V., Schaffer, K. K., Schubnell, M., Serrano, S., Sevilla-Noarbe, I., Sievers, C., Smecher, G., Smith, M., Soares-Santos, M., Stark, A. A., Story, K. T., Suchyta, E., Swanson, M. E. C., Tarle, G., Tucker, C., Vanderlinde, K., Veach, T., De Vicente, J., Vieira, J. D., Vikram, V., Wang, G., W. L. K., Wu, Yefremenko, V., and Zhang, Y.
- Subjects
Physics ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Cosmic microwave background ,Cosmic microwave background Gravitational lenses Galaxy Clusters ,Astrophysics::Instrumentation and Methods for Astrophysics ,FOS: Physical sciences ,RCUK ,General Physics and Astronomy ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Polarization (waves) ,01 natural sciences ,Cosmology ,Gravitational lens ,0103 physical sciences ,astro-ph.CO ,Dark energy ,Cluster (physics) ,010306 general physics ,STFC ,Galaxy cluster ,Weak gravitational lensing ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We report the first detection of gravitational lensing due to galaxy clusters using only the polarization of the cosmic microwave background (CMB). The lensing signal is obtained using a new estimator that extracts the lensing dipole signature from stacked images formed by rotating the cluster-centered Stokes $Q/U$ map cutouts along the direction of the locally measured background CMB polarization gradient. Using data from the SPTpol 500 deg$^{2}$ survey at the locations of roughly 18,000 clusters with richness $\lambda \ge 10$ from the Dark Energy Survey (DES) Year-3 full galaxy cluster catalog, we detect lensing at $4.8\sigma$. The mean stacked mass of the selected sample is found to be $(1.43 \pm 0.4)\ \times 10^{14}\ {\rm M_{\odot}}$ which is in good agreement with optical weak lensing based estimates using DES data and CMB-lensing based estimates using SPTpol temperature data. This measurement is a key first step for cluster cosmology with future low-noise CMB surveys, like CMB-S4, for which CMB polarization will be the primary channel for cluster lensing measurements., Comment: 10 pages, 3 figures, 1 table; typos fixed; accepted for publication in PRL
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- 2019
39. Enabling QM-accurate simulation of dislocation motion in γ−Ni and α−Fe using a hybrid multiscale approach
- Author
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Aldo Glielmo, A. De Vita, Federico Bianchini, and James R. Kermode
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Materials science ,Physics and Astronomy (miscellaneous) ,Phase (waves) ,02 engineering and technology ,021001 nanoscience & nanotechnology ,01 natural sciences ,Computational physics ,Crystal ,Condensed Matter::Materials Science ,Molecular dynamics ,0103 physical sciences ,Embedding ,Partial dislocations ,General Materials Science ,Dislocation ,010306 general physics ,0210 nano-technology ,Quantum ,Stacking fault - Abstract
We present an extension of the ‘learn on the fly’ method to the study of the motion of dislocations in metallic systems, developed with the aim of producing information-efficient force models that can be systematically validated against reference QM calculations. Nye tensor analysis is used to dynamically track the quantum region centered at the core of a dislocation, thus enabling quantum mechanics/molecular mechanics simulations. The technique is used to study the motion of screw dislocations in Ni-Al systems, relevant to plastic deformation in Ni-based alloys, at a variety of temperature/strain conditions. These simulations reveal only a moderate spacing ( ∼ 5 A ) between Shockley partial dislocations, at variance with the predictions of traditional molecular dynamics (MD) simulation using interatomic potentials, which yields a much larger spacing in the high stress regime. The discrepancy can be rationalized in terms of the elastic properties of an hcp crystal, which influence the behavior of the stacking fault region between Shockley partial dislocations. The transferability of this technique to more challenging systems is addressed, focusing on the expected accuracy of such calculations. The bcc α − Fe phase is a prime example, as its magnetic properties at the open surfaces make it particularly challenging for embedding-based QM/MM techniques. Our tests reveal that high accuracy can still be obtained at the core of a dislocation, albeit at a significant computational cost for fully converged results. However, we find this cost can be reduced by using a machine learning approach to progressively reduce the rate of expensive QM calculations required during the dynamical simulations, as the size of the QM database increases.
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- 2019
40. Mass calibration of optically selected DES clusters using a measurement of CMB-cluster lensing with SPTpol data
- Author
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John E. Carlstrom, D. L. Burke, A. E. Evrard, Juan Garcia-Bellido, E. Bertin, T. L. Chou, J. Hubmayr, D. Rapetti, G. Gutierrez, Robert I. Citron, M. E.C. Swanson, Jeff McMahon, J. Gschwend, Flavia Sobreira, J. D. Hrubes, N. Huang, Jason W. Henning, S. Serrano, N. L. Harrington, S. Allam, Robert A. Gruendl, K. Honscheid, Joaquin Vieira, Adrian T. Lee, Lloyd Knox, Daniel Gruen, A. A. Plazas, I. Sevilla-Noarbe, Yanxi Zhang, Michael Schubnell, Peter Melchior, T. de Haan, Tianjun Li, J. Carretero, Peter A. R. Ade, Bradford Benson, Amy N. Bender, B. Flaugher, K. T. Story, C. L. Davis, V. Scarpine, L. E. Bleem, Srinivasan Raghunathan, H. C. Chiang, Keith Bechtol, Christian L. Reichardt, K. K. Schaffer, Felipe Menanteau, Valentine Novosad, Graeme Smecher, Ramon Miquel, P. Doel, Gregory Tarle, T. Jeltema, C. L. Chang, David J. James, J. P. Dietrich, Benjamin Saliwanchik, R. C. Smith, W. G. Hartley, Federico Bianchini, Gensheng Wang, Ben Hoyle, Gilbert Holder, Nathan Whitehorn, D. L. Hollowood, Pablo Fosalba, John P. Nibarger, Andrew Nadolski, Gene C. Hilton, K. Vanderlinde, David Brooks, Elizabeth George, M. A. G. Maia, C. J. Miller, A. K. Romer, Jason Gallicchio, T. Natoli, T. M. Crawford, E. J. Baxter, A. Carnero Rosell, J. E. Ruhl, Carole Tucker, Enrique Gaztanaga, Joshua Montgomery, H-M. Cho, N. W. Halverson, András Kovács, J. De Vicente, A. G. Kim, E. Suchyta, Antony A. Stark, M. A. Dobbs, Salcedo Romero de Ávila, C. Pryke, Stephen Padin, Marcos Lima, J. A. Beall, S. S. Meyer, M. Carrasco Kind, Nikhel Gupta, T. McClintock, N. Kuropatkin, J. T. Sayre, T. N. Varga, L. N. da Costa, E. Rozo, J. Annis, J. E. Austermann, Joshua A. Frieman, Z. Hou, Kyler Kuehn, Jennifer L. Marshall, Daniel Thomas, Marcelle Soares-Santos, W. B. Everett, S. Patil, Carlos E. Cunha, A. T. Crites, S. Desai, T. F. Eifler, T. M. C. Abbott, E. J. Sanchez, Kent D. Irwin, Lindsey Bleem, L. M. Mocanu, H. T. Diehl, W. L. K. Wu, W. L. Holzapfel, Gary Bernstein, A. J. Gilbert, Adam Anderson, Institut d'Astrophysique de Paris (IAP), Institut national des sciences de l'Univers (INSU - CNRS)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS), and DES
- Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,010504 meteorology & atmospheric sciences ,Cosmic microwave background ,FOS: Physical sciences ,Flux ,Astrophysics ,cosmic background radiation ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Measure (mathematics) ,gravitational lensing: weak ,weak [gravitational lensing] ,0103 physical sciences ,Cluster (physics) ,clusters: general [galaxies] ,010303 astronomy & astrophysics ,STFC ,Galaxy cluster ,QC ,0105 earth and related environmental sciences ,Physics ,Astrophysics::Instrumentation and Methods for Astrophysics ,RCUK ,Estimator ,Astronomy and Astrophysics ,Galaxy ,Space and Planetary Science ,galaxies: clusters: general ,astro-ph.CO ,Dark energy ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We use cosmic microwave background (CMB) temperature maps from the 500 deg$^{2}$ SPTpol survey to measure the stacked lensing convergence of galaxy clusters from the Dark Energy Survey (DES) Year-3 redMaPPer (RM) cluster catalog. The lensing signal is extracted through a modified quadratic estimator designed to be unbiased by the thermal Sunyaev-Zel{'}dovich (tSZ) effect. The modified estimator uses a tSZ-free map, constructed from the SPTpol 95 and 150 GHz datasets, to estimate the background CMB gradient. For lensing reconstruction, we employ two versions of the RM catalog: a flux-limited sample containing 4003 clusters and a volume-limited sample with 1741 clusters. We detect lensing at a significance of 8.7$\sigma$(6.7$\sigma$) with the flux(volume)-limited sample. By modeling the reconstructed convergence using the Navarro-Frenk-White profile, we find the average lensing masses to be $M_{200m}$ = ($1.62^{+0.32}_{-0.25}$ [stat.] $\pm$ 0.04 [sys.]) and ($1.28^{+0.14}_{-0.18}$ [stat.] $\pm$ 0.03 [sys.]) $\times\ 10^{14}\ M_{\odot}$ for the volume- and flux-limited samples respectively. The systematic error budget is much smaller than the statistical uncertainty and is dominated by the uncertainties in the RM cluster centroids. We use the volume-limited sample to calibrate the normalization of the mass-richness scaling relation, and find a result consistent with the galaxy weak-lensing measurements from DES (Mcclintock et al. 2018)., Comment: 19 pages, 6 figures, published in ApJ
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- 2019
41. First-Principles Study of the Structural Stability and Dynamic Properties of Li2MSiO4 (M = Mn, Co, Ni) Polymorphs
- Author
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Federico Bianchini, Ponniah Vajeeston, and Helmer Fjellvåg
- Subjects
Control and Optimization ,Materials science ,Energy Engineering and Power Technology ,chemistry.chemical_element ,Thermodynamics ,02 engineering and technology ,Electronic structure ,mechanical stability ,010402 general chemistry ,lcsh:Technology ,01 natural sciences ,transport properties ,Electrical and Electronic Engineering ,Engineering (miscellaneous) ,cathode materials ,lcsh:T ,Renewable Energy, Sustainability and the Environment ,Li ion battery ,021001 nanoscience & nanotechnology ,electronic structure ,0104 chemical sciences ,chemistry ,Chemical bond ,Structural stability ,DFT study ,Density of states ,structural stability ,Lithium ,Density functional theory ,Deformation (engineering) ,0210 nano-technology ,relative stability ,Single crystal ,Energy (miscellaneous) - Abstract
In recent years, the scientific community has shown an increasing interest in regards to the investigation of novel materials for the intercalation of lithium atoms, suitable for application as cathodes in the new generations of Li-ion batteries. Within this framework, we have computed the relative structural stability, the electronic structure, the elastic and dynamic properties of Li2MSiO4 compounds (M = Mn, Co, Ni) by means of first-principles calculations based on density functional theory. The so-obtained structural parameters of the examined phases are in agreement with previous reports. The energy differences between different polymorphs are found to be small, and most of these structures are dynamically stable. The band structures and density of states are computed to analyse the electronic properties and characterise the chemical bonding. The single crystal elastic constants are calculated for all the examined modifications, proving their mechanical stability. These Li2MSiO4 materials are found to present a ductile behaviour upon deformation. The diffusion coefficients of Li ions, calculated at room temperature for all the examined modifications, reveal a poor conductivity for this class of materials.
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- 2019
- Full Text
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42. Broadband spectral energy distributions of SDSS-selected quasars and of their host galaxies: intense activity at the onset of AGN feedback
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Carlo Baccigalupi, J. González-Nuevo, Giulio Fabbian, Andrea Lapi, Federico Bianchini, Roberto Gilli, Institut d'astrophysique spatiale (IAS), Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS), ITA, FRA, and ESP
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QSOS ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,Active galactic nucleus ,010504 meteorology & atmospheric sciences ,Astrophysics::High Energy Astrophysical Phenomena ,galaxies: active ,FOS: Physical sciences ,Astrophysics ,Astrophysics::Cosmology and Extragalactic Astrophysics ,01 natural sciences ,Luminosity ,infrared: galaxies ,Settore FIS/05 - Astronomia e Astrofisica ,quasars: general ,0103 physical sciences ,Astrophysics::Solar and Stellar Astrophysics ,010303 astronomy & astrophysics ,galaxies: active – infrared: galaxies – quasars: general ,Astrophysics::Galaxy Astrophysics ,0105 earth and related environmental sciences ,Physics ,Luminous infrared galaxy ,Star formation ,Astronomy and Astrophysics ,Quasar ,Astrophysics - Astrophysics of Galaxies ,Redshift ,Space and Planetary Science ,Astrophysics of Galaxies (astro-ph.GA) ,Spectral energy distribution ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
We present the mean spectral energy distribution (SED) of a sample of optically selected quasars (QSOs) at redshifts of $1 \le z \le 5$. To derive it, we exploit photometric information from SDSS, UKIDSS, and WISE surveys in combination with a stacking analysis of \textit{Herschel}, \textit{AKARI}, and \textit{Planck} maps at the location of the QSOs. The near-UV and optical parts of the reconstructed mean rest-frame SED are similar to those found in other studies. However, the SED shows an excess at 1-2 $\mu$m (when compared to the aforementioned SEDs normalized in the near-UV) and a prominent bump around 4-6 $\mu$m, followed by a decrease out to $\sim 20 \,\mu$m and a subsequent far-IR bump. From the fitted SEDs we estimate the average active galactic nuclei (AGN) luminosity $L_{\rm AGN}$ and star formation rate (SFR) as function of cosmic time, finding typical $L_{\rm AGN} \sim 10^{46} - 10^{47}$ erg/s and SFR $\sim 50 - 1000\, M_{\odot}/$yr. We develop mid-IR based criteria to split the QSO sample, finding that these allow us to move along the average relationship in the SFR vs. $L_{\rm AGN}$ diagram toward increasing AGN luminosities. When interpreted in the context of the in-situ coevolution scenario presented by Lapi et al. 2014, our results suggest that the detection in the far-IR band is an effective criterion to select objects where the star formation is on the verge of being affected by energy/momentum feedback from the central AGN., Comment: 23 pages, 9 figures, text updated to match the accepted version, ApJ in press
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- 2019
43. QSOs sigposting cluster size halos as gravitational lenses: halo mass, projected mass density profile and concentration at z∼0.7
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Federico Bianchini, Mattia Negrello, Laura Bonavera, Jesús Daniel Santos, F. J. de Cos Juez, Sergio Luis Suárez Gómez, Andrea Lapi, E. Díez Alonso, and J. González-Nuevo
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Physics ,QSOS ,Cosmology and Nongalactic Astrophysics (astro-ph.CO) ,010308 nuclear & particles physics ,gravitational lensing ,FOS: Physical sciences ,Magnification ,Astronomy and Astrophysics ,Astrophysics ,weak gravitational lensing ,01 natural sciences ,Measure (mathematics) ,Galaxy ,Gravitation ,weak gravitational lensing, galaxy surveys, gravitational lensing ,Gravitational lens ,Settore FIS/05 - Astronomia e Astrofisica ,0103 physical sciences ,Cluster (physics) ,Halo ,galaxy surveys ,010303 astronomy & astrophysics ,Astrophysics - Cosmology and Nongalactic Astrophysics - Abstract
Magnification bias is a gravitational lensing effect that is normally overlooked because it is considered sub-optimal in comparison with the lensing shear. Thanks to the demonstrated optimal characteristics of the sub-millimetre galaxies (SMGs) for lensing analysis, in this work we were able to measure the magnification bias produced by a sample of QSOs acting as lenses, $0.2 13.6_{-0.4}^{+0.9}$, also confirmed by the mass density profile analysis ($M_{200c}\sim 10^{14} M_\odot$). These mass values indicate that we are observing the lensing effect of a cluster size halo signposted by the QSOs, as in previous studies of the magnification bias. Moreover, we were able to estimate the lensing convergence, $\kappa(\theta)$, for our magnification bias measurements down to a few kpcs. The derived mass density profile is in good agreement with a Navarro-Frank-White (NFW) profile. We also attempt an estimation of the halo mass and the concentration parameters, obtaining $M_{NFW}=1.0^{+0.4}_{-0.2}\times10^{14} M_\odot$ and $C=3.5_{-0.3}^{+0.5}$. This concentration value is rather low and it would indicate that the cluster halos around these QSOs are unrelaxed. However, higher concentration values still provides a compatible fit to the data., Comment: 30 pages, 8 figures, JCAP accepted
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- 2019
44. The POLARBEAR Fourier Transform Spectrometer Calibrator and Spectroscopic Characterization of the POLARBEAR Instrument
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Hans P. Paar, Ben Westbrook, Joseph Seibert, Osamu Tajima, Aritoki Suzuki, Darcy Barron, L. N. Lowry, Haruki Nishino, Tucker Elleflot, Praween Siritanasak, Nobuhiko Katayama, Masaya Hasegawa, Mario Faundez, Brian Keating, Paul L. Richards, K. Cheung, Giulio Fabbian, Neil Goeckner-Wald, Giuseppe Puglisi, M. Navaroli, Kam Arnold, S. Takatori, C. Tsai, Adrian T. Lee, Yuji Chinone, Federico Bianchini, Frederick Matsuda, and D. Kaneko
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TA1501 ,Cosmic microwave background ,FOS: Physical sciences ,01 natural sciences ,010305 fluids & plasmas ,law.invention ,Telescope ,Optics ,Engineering ,QB0980 ,law ,0103 physical sciences ,Instrumentation ,Instrumentation and Methods for Astrophysics (astro-ph.IM) ,Astrophysics::Galaxy Astrophysics ,Applied Physics ,QB ,010302 applied physics ,Physics ,Settore FIS/05 ,business.industry ,Parabolic reflector ,Detector ,Astrophysics::Instrumentation and Methods for Astrophysics ,Steradian ,Polarizer ,Interferometry ,Cardinal point ,TA ,Physical Sciences ,Chemical Sciences ,business ,Astrophysics - Instrumentation and Methods for Astrophysics ,astro-ph.IM - Abstract
We describe the Fourier Transform Spectrometer (FTS) used for in-field testing of the POLARBEAR receiver, an experiment located in the Atacama Desert of Chile which measures the cosmic microwave background (CMB) polarization. The POLARBEAR-FTS (PB-FTS) is a Martin-Puplett interferometer designed to couple to the Huan Tran Telescope (HTT) on which the POLARBEAR receiver is installed. The PB-FTS measured the spectral response of the POLARBEAR receiver with signal-to-noise ratio (SNR) $>20$ for $\sim$69% of the focal plane detectors due to three features: a high throughput of 15.1 steradian cm$^{2}$, optimized optical coupling to the POLARBEAR optics using a custom designed output parabolic mirror, and a continuously modulated output polarizer. The PB-FTS parabolic mirror is designed to mimic the shape of the 2.5 m-diameter HTT primary reflector which allows for optimum optical coupling to the POLARBEAR receiver, reducing aberrations and systematics. One polarizing grid is placed at the output of the PB-FTS, and modulated via continuous rotation. This modulation allows for decomposition of the signal into different harmonics that can be used to probe potentially pernicious sources of systematic error in a polarization-sensitive instrument. The high throughput and continuous output polarizer modulation features are unique compared to other FTS calibrators used in the CMB field. In-field characterization of the POLARBEAR receiver was accomplished using the PB-FTS in April 2014. We discuss the design, construction, and operation of the PB-FTS and present the spectral characterization of the POLARBEAR receiver. We introduce future applications for the PB-FTS in the next-generation CMB experiment, the Simons Array.
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- 2019
- Full Text
- View/download PDF
45. The Simons Observatory: Astro2020 APC Whitepaper
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Abitbol, Maximilian H., Shunsuke, Adachi, Peter, Ade, James, Aguirre, Zeeshan, Ahmed, Simone, Aiola, Aamir, Ali, David, Alonso, Alvarez, Marcelo A., Kam, Arnold, Peter, Ashton, Zachary, Atkins, Jason, Austermann, Humna, Awan, Carlo, Baccigalupi, Taylor, Baildon, Anton Baleato Lizancos, Darcy, Barron, Nick, Battaglia, Richard, Battye, Eric, Baxter, Andrew, Bazarko, Beall, James A., Rachel, Bean, Dominic, Beck, Shawn, Beckman, Benjamin, Beringue, Tanay, Bhandarkar, Sanah, Bhimani, Federico, Bianchini, Steven, Boada, David, Boettger, Boris, Bolliet, Richard Bond, J., Julian, Borrill, Brown, Michael L., Sarah Marie Bruno, Sean, Bryan, Erminia, Calabrese, Victoria, Calafut, Paolo, Calisse, Julien, Carron, Carl, Fred. M., Juan, Cayuso, Anthony, Challinor, Grace, Chesmore, Yuji, Chinone, Jens, Chluba, Hsiao-Mei Sherry Cho, Steve, Choi, Susan, Clark, Philip, Clarke, Carlo, Contaldi, Gabriele, Coppi, Cothard, Nicholas F., Kevin, Coughlin, Will, Coulton, Devin, Crichton, Crowley, Kevin D., Crowley, Kevin T., Ari, Cukierman, D'Ewart, John M., Rolando, Dünner, Tijmen de Haan, Mark, Devlin, Simon, Dicker, Bradley, Dober, Duell, Cody J., Shannon, Duff, Adri, Duivenvoorden, Dunkley, Jo, Hamza El Bouhargani, Josquin, Errard, Giulio, Fabbian, Stephen, Feeney, James, Fergusson, Simone, Ferraro, Pedro, Fluxà, Katherine, Freese, Frisch, Josef C., Andrei, Frolov, George, Fuller, Nicholas, Galitzki, Gallardo, Patricio A., Jose Tomas Galvez Ghersi, Jiansong, Gao, Eric, Gawiser, Martina, Gerbino, Vera, Gluscevic, Neil, Goeckner-Wald, Joseph, Golec, Sam, Gordon, Megan, Gralla, Daniel, Green, Arpi, Grigorian, John, Groh, Chris, Groppi, Yilun, Guan, Gudmundsson, Jon E., Mark, Halpern, Dongwon, Han, Peter, Hargrave, Kathleen, Harrington, Masaya, Hasegawa, Matthew, Hasselfield, Makoto, Hattori, Victor, Haynes, Masashi, Hazumi, Erin, Healy, Henderson, Shawn W., Brandon, Hensley, Carlos, Hervias-Caimapo, Hill, Charles A., Colin Hill, J., Gene, Hilton, Matt, Hilton, Hincks, Adam D., Gary, Hinshaw, Renée, Hložek, Shirley, Ho, Shuay-Pwu Patty Ho, Hoang, Thuong D., Jonathan, Hoh, Hotinli, Selim C., Zhiqi, Huang, Johannes, Hubmayr, Kevin, Huffenberger, Hughes, John P., Anna, Ijjas, Margaret, Ikape, Kent, Irwin, Jaffe, Andrew H., Bhuvnesh, Jain, Oliver, Jeong, Matthew, Johnson, Daisuke, Kaneko, Karpel, Ethan D., Nobuhiko, Katayama, Brian, Keating, Reijo, Keskitalo, Theodore, Kisner, Kenji, Kiuchi, Jeff, Klein, Kenda, Knowles, Anna, Kofman, Brian, Koopman, Arthur, Kosowsky, Nicoletta, Krachmalnicoff, Akito, Kusaka, Phil, Laplante, Jacob, Lashner, Adrian, Lee, Eunseong, Lee, Antony, Lewis, Yaqiong, Li, Zack, Li, Michele, Limon, Eric, Linder, Jia, Liu, Carlos, Lopez-Caraballo, Thibaut, Louis, Marius, Lungu, Mathew, Madhavacheril, Daisy, Mak, Felipe, Maldonado, Hamdi, Mani, Ben, Mates, Frederick, Matsuda, Loïc, Maurin, Phil, Mauskopf, Andrew, May, Nialh, Mccallum, Heather, Mccarrick, Chris, Mckenney, Jeff, Mcmahon, Daniel Meerburg, P., James, Mertens, Joel, Meyers, Amber, Miller, Mark, Mirmelstein, Kavilan, Moodley, Jenna, Moore, Moritz, Munchmeyer, Charles, Munson, Masaaki, Murata, Sigurd, Naess, Toshiya, Namikawa, Federico, Nati, Martin, Navaroli, Laura, Newburgh, Ho Nam Nguyen, Andrina, Nicola, Mike, Niemack, Haruki, Nishino, Yume, Nishinomiya, John, Orlowski-Scherer, Luca, Pagano, Bruce, Partridge, Francesca, Perrotta, Phumlani, Phakathi, Lucio, Piccirillo, Elena, Pierpaoli, Giampaolo, Pisano, Davide, Poletti, Roberto, Puddu, Giuseppe, Puglisi, Chris, Raum, Reichardt, Christian L., Mathieu, Remazeilles, Yoel, Rephaeli, Dominik, Riechers, Felipe, Rojas, Aditya, Rotti, Anirban, Roy, Sharon, Sadeh, Yuki, Sakurai, Maria, Salatino, Mayuri Sathyanarayana Rao, Lauren, Saunders, Emmanuel, Schaan, Marcel, Schmittfull, Neelima, Sehgal, Joseph, Seibert, Uros, Seljak, Paul, Shellard, Blake, Sherwin, Meir, Shimon, Carlos, Sierra, Jonathan, Sievers, Cristobal, Sifon, Precious, Sikhosana, Maximiliano, Silva-Feaver, Simon, Sara M., Adrian, Sinclair, Kendrick, Smith, Wuhyun, Sohn, Rita, Sonka, David, Spergel, Jacob, Spisak, Staggs, Suzanne T., George, Stein, Stevens, Jason R., Radek, Stompor, Aritoki, Suzuki, Osamu, Tajima, Satoru, Takakura, Grant, Teply, Thomas, Daniel B., Ben, Thorne, Robert, Thornton, Trac, Hy, Jesse, Treu, Calvin, Tsai, Carole, Tucker, Joel, Ullom, Vagnozzi, Sunny, Alexander van Engelen, Jeff Van Lanen, Van Winkle, Daniel D., Vavagiakis, Eve M., Clara, Vergès, Michael, Vissers, Kasey, Wagoner, Samantha, Walker, Yuhan, Wang, Jon, Ward, Ben, Westbrook, Nathan, Whitehorn, Jason, Williams, Joel, Williams, Edward, Wollack, Zhilei, Xu, Siavash, Yasini, Edward, Young, Byeonghee, Yu, Cyndia, Yu, Fernando, Zago, Mario, Zannoni, Hezi, Zhang, Kaiwen, Zheng, Ningfeng, Zhu, and Andrea, Zonca
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- 2019
46. Anisotropy of the proton kinetic energy in ice Ih
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Y. Finkelstein, Ponniah Vajeeston, Raymond Moreh, and Federico Bianchini
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Physics ,Phonon ,Scattering ,Ice Ih ,02 engineering and technology ,Surfaces and Interfaces ,010402 general chemistry ,021001 nanoscience & nanotechnology ,Condensed Matter Physics ,Kinetic energy ,01 natural sciences ,Molecular physics ,Inelastic neutron scattering ,0104 chemical sciences ,Surfaces, Coatings and Films ,Materials Chemistry ,First principle ,Density functional theory ,0210 nano-technology ,Anisotropy - Abstract
The partial vibrational density of states (pVDOS) of ice Ih, as simulated by first principle modeling based on density functional theory (DFT), is utilized for computing the Cartesian components of the proton and oxygen quantum kinetic energies, Ke(H) and Ke(O) respectively, along and perpendicular to the hydrogen bonds. The DFT method was found to yield better agreement with deep inelastic neutron scattering (DINS) measurements than the semi empirical (SE) calculations. The advantage of using the DFT method is to enable us to resolve the external and internal phonon bands of the Cartesian projections of the pVDOS, and hence those of the lattice and vibrational components of Ke(H). We show that a pVDOS analysis is a valuable tool in testing scattering results of complex systems and suggest its potential to explore competing quantum effects, e.g. on Ke(H) across phase transitions in water.
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- 2019
47. Atomic Scale Identification of Coexisting Graphene Structures on Ni(111)
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Laerte L. Patera, Maria Peressi, Giovanni Comelli, Cristina Africh, Federico Bianchini, Federico, Bianchini, Patera, LAERTE LUIGI, Peressi, Maria, Cristina, Africh, and Comelli, Giovanni
- Subjects
Ni ,graphene ,atomic structure ,Scanning Tunneling Microscopy (STM) ,density functional theory (DFT) calculations ,Nichel ,Graphene ,Chemistry ,chemistry.chemical_element ,Electron transport chain ,Atomic units ,law.invention ,Characterization (materials science) ,Crystallography ,density functional theory (DFT) ,law ,Chemical physics ,General Materials Science ,Density functional theory ,Physical and Theoretical Chemistry ,Scanning tunneling microscope ,Single crystal ,Carbon ,density functional theory (DFT) calculation - Abstract
Through a combined scanning tunneling microscopy (STM) and density functional theory (DFT) approach, we provide a full characterization of the different chemisorbed configurations of epitaxial graphene coexisting on the Ni(111) single crystal surface. Top-fcc, top-hcp, and top-bridge are found to be stable structures with comparable adsorption energy. By comparison of experiments and simulations, we solve an existing debate, unambiguously distinguishing these configurations in high-resolution STM images and characterizing the transitions between adjacent domains. Such transitions, described in detail through atomistic models, occur not only via sharp domain boundaries, with extended defects, but predominantly via smooth in-plane distortions of the carbon network, without disruption of the hexagonal rings, which are expected not to significantly affect electron transport.
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- 2014
48. Properties of Novel Non-Silicon Materials for Photovoltaic Applications: A First-Principle Insight
- Author
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Federico Bianchini, Murugesan Rasukkannu, Dhayalan Velauthapillai, and Ponniah Vajeeston
- Subjects
Materials science ,Band gap ,Population ,02 engineering and technology ,hybrid density function ,01 natural sciences ,lcsh:Technology ,Article ,BSE ,0103 physical sciences ,General Materials Science ,Crystalline silicon ,010306 general physics ,Absorption (electromagnetic radiation) ,education ,lcsh:Microscopy ,lcsh:QC120-168.85 ,education.field_of_study ,VDP::Teknologi: 500::Materialteknologi: 520 ,lcsh:QH201-278.5 ,business.industry ,lcsh:T ,non-silicon ,PV materials ,021001 nanoscience & nanotechnology ,Hybrid functional ,Semiconductor ,non-conventional solar cells ,lcsh:TA1-2040 ,Optoelectronics ,Density functional theory ,Direct and indirect band gaps ,lcsh:Descriptive and experimental mechanics ,lcsh:Electrical engineering. Electronics. Nuclear engineering ,0210 nano-technology ,business ,HSE06 ,lcsh:Engineering (General). Civil engineering (General) ,lcsh:TK1-9971 - Abstract
Due to the low absorption coefficients of crystalline silicon-based solar cells, researchers have focused on non-silicon semiconductors with direct band gaps for the development of novel photovoltaic devices. In this study, we use density functional theory to model the electronic structure of a large database of candidates to identify materials with ideal properties for photovoltaic applications. The first screening is operated at the GGA level to select only materials with a sufficiently small direct band gap. We extracted twenty-seven candidates from an initial population of thousands, exhibiting GGA band gap in the range 0.5&ndash, 1 eV. More accurate calculations using a hybrid functional were performed on this subset. Based on this, we present a detailed first-principle investigation of the four optimal compounds, namely, TlBiS2, Ba3BiN, Ag2BaS2, and ZrSO. The direct band gap of these materials is between 1.1 and 2.26 eV. In the visible region, the absorption peaks that appear in the optical spectra for these compounds indicate high absorption intensity. Furthermore, we have investigated the structural and mechanical stability of these compounds and calculated electron effective masses. Based on in-depth analysis, we have identified TlBiS2, Ba3BiN, Ag2BaS2, and ZrSO as very promising candidates for photovoltaic applications.
- Published
- 2018
49. Imprints of gravitational lensing in the Planck cosmic microwave background data at the location of WISE×SCOS galaxies
- Author
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Federico Bianchini, Christian L. Reichardt, and Srinivasan Raghunathan
- Subjects
Physics ,010308 nuclear & particles physics ,Cosmic microwave background ,Astrophysics ,01 natural sciences ,Galaxy ,Redshift ,symbols.namesake ,Gravitational lens ,0103 physical sciences ,symbols ,Planck ,010303 astronomy & astrophysics ,Weak gravitational lensing ,Galaxy cluster - Abstract
We detect weak gravitational lensing of the cosmic microwave background at the location of the $WISE\ifmmode\times\else\texttimes\fi{}\mathrm{SuperCOSMOS}$ ($WISE\ifmmode\times\else\texttimes\fi{}\mathrm{SCOS}$) galaxies using the publicly available Planck lensing convergence map. By stacking the lensing convergence map at the position of 12.4 million galaxies in the redshift range $0.1\ensuremath{\le}z\ensuremath{\le}0.345$, we find the average mass of the galaxies to be ${\mathrm{M}}_{20{0}_{\mathrm{crit}}}=6.25\ifmmode\pm\else\textpm\fi{}0.6\ifmmode\times\else\texttimes\fi{}{10}^{12}\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$. The null hypothesis of no lensing is rejected at a significance of $17\ensuremath{\sigma}$. We split the galaxy sample into three redshift slices, each containing $\ensuremath{\sim}4.1$ million objects, and obtain lensing masses in each slice of $4.18\ifmmode\pm\else\textpm\fi{}0.8$, $6.93\ifmmode\pm\else\textpm\fi{}0.9$, and $18.84\ifmmode\pm\else\textpm\fi{}1.2\ifmmode\times\else\texttimes\fi{}{10}^{12}\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$. Our results suggest a redshift evolution of the galaxy sample masses, but this apparent increase might be due to the preferential selection of intrinsically luminous sources at high redshifts. The recovered mass of the stacked sample is reduced by 28% when we remove the galaxies in the vicinity of galaxy clusters with mass ${\mathrm{M}}_{20{0}_{\mathrm{crit}}}=2\ifmmode\times\else\texttimes\fi{}{10}^{14}\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$. We forecast that upcoming CMB surveys can achieve 5% galaxy mass constraints over sets of 12.4 million galaxies with ${\mathrm{M}}_{20{0}_{\mathrm{crit}}}=1\ifmmode\times\else\texttimes\fi{}{10}^{12}\text{ }\text{ }{M}_{\ensuremath{\bigodot}}$ at $z=1$.
- Published
- 2018
50. Cross-correlation of CMB Polarization Lensing with High-z Submillimeter Herschel-ATLAS Galaxies
- Author
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Grant Teply, Masashi Hazumi, Tucker Elleflot, Nicholas Galitzki, D. Beck, Akito Kusaka, Carlo Baccigalupi, Blake D. Sherwin, Nicoletta Krachmalnicoff, Christian L. Reichardt, Clara Vergès, Eric V. Linder, Giulio Fabbian, Giuseppe Puglisi, L. Howe, Hamza El Bouhargani, Osamu Tajima, Neil Goeckner-Wald, D. Boettger, M. Navaroli, Kam Arnold, K. Cheung, MA Faúndez, Josquin Errard, D. Leon, Julien Carron, S. Takakura, Masaya Hasegawa, Radek Stompor, N. Katayama, Brian Keating, Atp Pham, Federico Bianchini, Darcy Barron, L. N. Lowry, C. Tsai, H. Nishino, Chang Feng, Max Silva-Feaver, A. Suzuki, Julian Borrill, Frederick Matsuda, Aaron Lee, Yuji Chinone, D. Kaneko, S. Takatori, Davide Poletti, Yuto Minami, AstroParticule et Cosmologie (APC (UMR_7164)), Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3), Faundez, M, Arnold, K, Baccigalupi, C, Barron, D, Beck, D, Bianchini, F, Boettger, D, Borrill, J, Carron, J, Cheung, K, Chinone, Y, Bouhargani, H, Elleflot, T, Errard, J, Fabbian, G, Feng, C, Galitzki, N, Goeckner-Wald, N, Hasegawa, M, Hazumi, M, Howe, L, Kaneko, D, Katayama, N, Keating, B, Krachmalnicoff, N, Kusaka, A, Lee, A, Leon, D, Linder, E, Lowry, L, Matsuda, F, Minami, Y, Navaroli, M, Nishino, H, Pham, A, Poletti, D, Puglisi, G, Reichardt, C, Sherwin, B, Silva-Feaver, M, Stompor, R, Suzuki, A, Tajima, O, Takakura, S, Takatori, S, Teply, G, Tsai, C, Verges, C, Commissariat à l'énergie atomique et aux énergies alternatives (CEA)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Observatoire de Paris, Université Paris sciences et lettres (PSL)-Université Paris sciences et lettres (PSL)-Université Paris Diderot - Paris 7 (UPD7)-Centre National de la Recherche Scientifique (CNRS), and Polarbear
- Subjects
QB991.L37 ,Cosmic microwave background radiation (322) ,010504 meteorology & atmospheric sciences ,astro-ph.GA ,Cosmic microwave background ,Large-scale structure of the universe (902) ,Astrophysics::Cosmology and Extragalactic Astrophysics ,Astrophysics ,Astronomy & Astrophysics ,Atomic ,Physical Chemistry ,01 natural sciences ,Cosmology ,QB0460 ,Particle and Plasma Physics ,Settore FIS/05 - Astronomia e Astrofisica ,QB0980 ,0103 physical sciences ,cosmic background radiation: polarization, cosmic background radiation: temperature, error: statistical, halo: mass, galaxy, redshift: dependence, lens, cosmic background radiation: power spectrum ,Nuclear ,10. No inequality ,010303 astronomy & astrophysics ,Astrophysics::Galaxy Astrophysics ,polarization lensing ,ComputingMilieux_MISCELLANEOUS ,Weak gravitational lensing ,QB ,0105 earth and related environmental sciences ,[PHYS]Physics [physics] ,Physics ,Settore FIS/05 ,Astrophysics::Instrumentation and Methods for Astrophysics ,Molecular ,Spectral density ,Astronomy and Astrophysics ,Polarization (waves) ,Redshift ,Galaxy ,Weak gravitational lensing (1797) ,Space and Planetary Science ,High-redshift galaxies (734) ,astro-ph.CO ,Halo ,[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph] ,Cosmology (343) ,Astronomical and Space Sciences ,Physical Chemistry (incl. Structural) - Abstract
著者人数: 48名 (所属. 宇宙航空研究開発機構宇宙科学研究所(JAXA)(ISAS): 羽澄, 昌史), Number of authors: 48 (Affiliation. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency(JAXA)(ISAS): Hazumi, Masashi), Accepted: 2019-09-26, 資料番号: SA1190160000
- Published
- 2019
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