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1. The Atacama Cosmology Telescope: DR6 Gravitational Lensing Map and Cosmological Parameters

Author

Mathew S. Madhavacheril, Frank J. Qu, Blake D. Sherwin, Niall MacCrann, Yaqiong Li, Irene Abril-Cabezas, Peter A. R. Ade, Simone Aiola, Tommy Alford, Mandana Amiri, Stefania Amodeo, Rui An, Zachary Atkins, Jason E. Austermann, Nicholas Battaglia, Elia Stefano Battistelli, James A. Beall, Rachel Bean, Benjamin Beringue, Tanay Bhandarkar, Emily Biermann, Boris Bolliet, J Richard Bond, Hongbo Cai, Erminia Calabrese, Victoria Calafut, Valentina Capalbo, Felipe Carrero, Anthony Challinor, Grace E. Chesmore, Hsiao-mei Cho, Steve K. Choi, Susan E. Clark, Rodrigo Córdova Rosado, Nicholas F. Cothard, Kevin Coughlin, William Coulton, Kevin T. Crowley, Roohi Dalal, Omar Darwish, Mark J. Devlin, Simon Dicker, Peter Doze, Cody J. Duell, Shannon M. Duff, Adriaan J. Duivenvoorden, Jo Dunkley, Rolando Dünner, Valentina Fanfani, Max Fankhanel, Gerrit Farren, Simone Ferraro, Rodrigo Freundt, Brittany Fuzia, Patricio A. Gallardo, Xavier Garrido, Jahmour Givans, Vera Gluscevic, Joseph E. Golec, Yilun Guan, Kirsten R. Hall, Mark Halpern, Dongwon Han, Ian Harrison, Matthew Hasselfield, Erin Healy, Shawn Henderson, Brandon Hensley, Carlos Hervías-Caimapo, J. Colin Hill, Gene C. Hilton, Matt Hilton, Adam D. Hincks, Renée Hložek, Shuay-Pwu Patty Ho, Zachary B. Huber, Johannes Hubmayr, Kevin M. Huffenberger, John P. Hughes, Kent Irwin, Giovanni Isopi, Hidde T. Jense, Ben Keller, Joshua Kim, Kenda Knowles, Brian J. Koopman, Arthur Kosowsky, Darby Kramer, Aleksandra Kusiak, Adrien La Posta, Alex Lague, Victoria Lakey, Eunseong Lee, Zack Li, Michele Limon, Martine Lokken, Thibaut Louis, Marius Lungu, Amanda MacInnis, Diego Maldonado, Felipe Maldonado, Maya Mallaby-Kay, Gabriela A. Marques, Jeff McMahon, Yogesh Mehta, Felipe Menanteau, Kavilan Moodley, Thomas W. Morris, Tony Mroczkowski, Sigurd Naess, Toshiya Namikawa, Federico Nati, Laura Newburgh, Andrina Nicola, Michael D. Niemack, Michael R. Nolta, John Orlowski-Scherer, Lyman A. Page, Shivam Pandey, Bruce Partridge, Heather Prince, Roberto Puddu, Federico Radiconi, Naomi Robertson, Felipe Rojas, Tai Sakuma, Maria Salatino, Emmanuel Schaan, Benjamin L. Schmitt, Neelima Sehgal, Shabbir Shaikh, Carlos Sierra, Jon Sievers, Cristóbal Sifón, Sara Simon, Rita Sonka, David N. Spergel, Suzanne T. Staggs, Emilie Storer, Eric R. Switzer, Niklas Tampier, Robert Thornton, Hy Trac, Jesse Treu, Carole Tucker, Joel Ullom, Leila R. Vale, Alexander Van Engelen, Jeff Van Lanen, Joshiwa van Marrewijk, Cristian Vargas, Eve M. Vavagiakis, Kasey Wagoner, Yuhan Wang, Lukas Wenzl, Edward J. Wollack, Zhilei Xu, Fernando Zago, and Kaiwen Zheng

Subjects
Cosmology, Observational cosmology, Cosmic microwave background radiation, Large-scale structure of the universe, Cosmological neutrinos, Particle astrophysics, Astrophysics, QB460-466
Abstract

We present cosmological constraints from a gravitational lensing mass map covering 9400 deg ^2 reconstructed from measurements of the cosmic microwave background (CMB) made by the Atacama Cosmology Telescope (ACT) from 2017 to 2021. In combination with measurements of baryon acoustic oscillations and big bang nucleosynthesis, we obtain the clustering amplitude σ _8 = 0.819 ± 0.015 at 1.8% precision, ${S}_{8}\equiv {\sigma }_{8}{({{\rm{\Omega }}}_{{\rm{m}}}/0.3)}^{0.5}=0.840\pm 0.028$ , and the Hubble constant H _0 = (68.3 ± 1.1) km s ^−1 Mpc ^−1 at 1.6% precision. A joint constraint with Planck CMB lensing yields σ _8 = 0.812 ± 0.013, ${S}_{8}\equiv {\sigma }_{8}{({{\rm{\Omega }}}_{{\rm{m}}}/0.3)}^{0.5}=0.831\pm 0.023$ , and H _0 = (68.1 ± 1.0) km s ^−1 Mpc ^−1 . These measurements agree with ΛCDM extrapolations from the CMB anisotropies measured by Planck. We revisit constraints from the KiDS, DES, and HSC galaxy surveys with a uniform set of assumptions and find that S _8 from all three are lower than that from ACT+Planck lensing by levels ranging from 1.7 σ to 2.1 σ . This motivates further measurements and comparison, not just between the CMB anisotropies and galaxy lensing but also between CMB lensing probing z ∼ 0.5–5 on mostly linear scales and galaxy lensing at z ∼ 0.5 on smaller scales. We combine with CMB anisotropies to constrain extensions of ΛCDM, limiting neutrino masses to ∑ m _ν < 0.13 eV (95% c.l.), for example. We describe the mass map and related data products that will enable a wide array of cross-correlation science. Our results provide independent confirmation that the universe is spatially flat, conforms with general relativity, and is described remarkably well by the ΛCDM model, while paving a promising path for neutrino physics with lensing from upcoming ground-based CMB surveys.

Published
2024
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2. The Atacama Cosmology Telescope: A Measurement of the DR6 CMB Lensing Power Spectrum and Its Implications for Structure Growth

Author

Frank J. Qu, Blake D. Sherwin, Mathew S. Madhavacheril, Dongwon Han, Kevin T. Crowley, Irene Abril-Cabezas, Peter A. R. Ade, Simone Aiola, Tommy Alford, Mandana Amiri, Stefania Amodeo, Rui An, Zachary Atkins, Jason E. Austermann, Nicholas Battaglia, Elia Stefano Battistelli, James A. Beall, Rachel Bean, Benjamin Beringue, Tanay Bhandarkar, Emily Biermann, Boris Bolliet, J Richard Bond, Hongbo Cai, Erminia Calabrese, Victoria Calafut, Valentina Capalbo, Felipe Carrero, Julien Carron, Anthony Challinor, Grace E. Chesmore, Hsiao-mei Cho, Steve K. Choi, Susan E. Clark, Rodrigo Córdova Rosado, Nicholas F. Cothard, Kevin Coughlin, William Coulton, Roohi Dalal, Omar Darwish, Mark J. Devlin, Simon Dicker, Peter Doze, Cody J. Duell, Shannon M. Duff, Adriaan J. Duivenvoorden, Jo Dunkley, Rolando Dünner, Valentina Fanfani, Max Fankhanel, Gerrit Farren, Simone Ferraro, Rodrigo Freundt, Brittany Fuzia, Patricio A. Gallardo, Xavier Garrido, Vera Gluscevic, Joseph E. Golec, Yilun Guan, Mark Halpern, Ian Harrison, Matthew Hasselfield, Erin Healy, Shawn Henderson, Brandon Hensley, Carlos Hervías-Caimapo, J. Colin Hill, Gene C. Hilton, Matt Hilton, Adam D. Hincks, Renée Hložek, Shuay-Pwu Patty Ho, Zachary B. Huber, Johannes Hubmayr, Kevin M. Huffenberger, John P. Hughes, Kent Irwin, Giovanni Isopi, Hidde T. Jense, Ben Keller, Joshua Kim, Kenda Knowles, Brian J. Koopman, Arthur Kosowsky, Darby Kramer, Aleksandra Kusiak, Adrien La Posta, Alex Lague, Victoria Lakey, Eunseong Lee, Zack Li, Yaqiong Li, Michele Limon, Martine Lokken, Thibaut Louis, Marius Lungu, Niall MacCrann, Amanda MacInnis, Diego Maldonado, Felipe Maldonado, Maya Mallaby-Kay, Gabriela A. Marques, Jeff McMahon, Yogesh Mehta, Felipe Menanteau, Kavilan Moodley, Thomas W. Morris, Tony Mroczkowski, Sigurd Naess, Toshiya Namikawa, Federico Nati, Laura Newburgh, Andrina Nicola, Michael D. Niemack, Michael R. Nolta, John Orlowski-Scherer, Lyman A. Page, Shivam Pandey, Bruce Partridge, Heather Prince, Roberto Puddu, Federico Radiconi, Naomi Robertson, Felipe Rojas, Tai Sakuma, Maria Salatino, Emmanuel Schaan, Benjamin L. Schmitt, Neelima Sehgal, Shabbir Shaikh, Carlos Sierra, Jon Sievers, Cristóbal Sifón, Sara Simon, Rita Sonka, David N. Spergel, Suzanne T. Staggs, Emilie Storer, Eric R. Switzer, Niklas Tampier, Robert Thornton, Hy Trac, Jesse Treu, Carole Tucker, Joel Ullom, Leila R. Vale, Alexander Van Engelen, Jeff Van Lanen, Joshiwa van Marrewijk, Cristian Vargas, Eve M. Vavagiakis, Kasey Wagoner, Yuhan Wang, Lukas Wenzl, Edward J. Wollack, Zhilei Xu, Fernando Zago, and Kaiwen Zheng

Subjects
Cosmological parameters, Cosmological parameters from large-scale structure, Astrophysics, QB460-466
Abstract

We present new measurements of cosmic microwave background (CMB) lensing over 9400 deg ^2 of the sky. These lensing measurements are derived from the Atacama Cosmology Telescope (ACT) Data Release 6 (DR6) CMB data set, which consists of five seasons of ACT CMB temperature and polarization observations. We determine the amplitude of the CMB lensing power spectrum at 2.3% precision (43 σ significance) using a novel pipeline that minimizes sensitivity to foregrounds and to noise properties. To ensure that our results are robust, we analyze an extensive set of null tests, consistency tests, and systematic error estimates and employ a blinded analysis framework. Our CMB lensing power spectrum measurement provides constraints on the amplitude of cosmic structure that do not depend on Planck or galaxy survey data, thus giving independent information about large-scale structure growth and potential tensions in structure measurements. The baseline spectrum is well fit by a lensing amplitude of A _lens = 1.013 ± 0.023 relative to the Planck 2018 CMB power spectra best-fit ΛCDM model and A _lens = 1.005 ± 0.023 relative to the ACT DR4 + WMAP best-fit model. From our lensing power spectrum measurement, we derive constraints on the parameter combination ${S}_{8}^{\mathrm{CMBL}}\equiv {\sigma }_{8}{\left({{\rm{\Omega }}}_{m}/0.3\right)}^{0.25}$ of ${S}_{8}^{\mathrm{CMBL}}=0.818\pm 0.022$ from ACT DR6 CMB lensing alone and ${S}_{8}^{\mathrm{CMBL}}=0.813\pm 0.018$ when combining ACT DR6 and Planck NPIPE CMB lensing power spectra. These results are in excellent agreement with ΛCDM model constraints from Planck or ACT DR4 + WMAP CMB power spectrum measurements. Our lensing measurements from redshifts z ∼ 0.5–5 are thus fully consistent with ΛCDM structure growth predictions based on CMB anisotropies probing primarily z ∼ 1100. We find no evidence for a suppression of the amplitude of cosmic structure at low redshifts.

Published
2024
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3. The Atacama Cosmology Telescope: A search for Planet 9

Author

Sigurd Naess, Simone Aiola, Nick Battaglia, Richard J. Bond, Erminia Calabrese, Steve K. Choi, Nicholas F. Cothard, Mark Halpern, J. Colin Hill, Brian J. Koopman, Mark Devlin, Jeff McMahon, Simon Dicker, Adriaan J. Duivenvoorden, Jo Dunkley, Valentina Fanfani, Simone Ferraro, Patricio A. Gallardo, Yilun Guan, Dongwon Han, Matthew Hasselfield, Adam D. Hincks, Kevin Huffenberger, Arthur B. Kosowsky, Thibaut Louis, Amanda Macinnis, Mathew S. Madhavacheril, Federico Nati, Michael D. Niemack, Lyman Page, Maria Salatino, Emmanuel Schaan, John Orlowski-Scherer, Alessandro Schillaci, Benjamin Schmitt, Neelima Sehgal, Cristóbal Sifón, Suzanne Staggs, Alexander Van Engelen, and Edward J Wollack

Subjects
Astrophysics, Astronomy
Abstract

We use Atacama Cosmology Telescope (ACT) observations at 98 GHz (2015–2019), 150 GHz (2013–2019), and 229 GHz (2017–2019) to perform a blind shift-and-stack search for Planet 9. The search explores distances from 300 au to 2000 au and velocities up to 6\farcm3 per year, depending on the distance (r). For a 5 Earth-mass Planet 9 the detection limit varies from 325 au to 625 au, depending on the sky location. For a 10 Earth-mass planet the corresponding range is 425 au to 775 au. The predicted aphelion and most likely location of the planet corresponds to the shallower end of these ranges. The search covers the whole 18,000 square degrees of the ACT survey. No significant detections are found, which is used to place limits on the millimeter-wave flux density of Planet 9 over much of its orbit. Overall we eliminate roughly 17% and 9% of the parameter space for a 5 and 10 Earth-mass Planet 9, respectively. These bounds approach those of a recent INPOP19a ephemeris-based analysis, but do not exceed it. We also provide a list of the 10 strongest candidates from the search for possible follow-up. More generally, we exclude (at 95% confidence) the presence of an unknown solar system object within our survey area brighter than 4–12 mJy (depending on position) at 150 GHz with current distance 300 au < r < 600 au and heliocentric angular velocity 1\farcm5 per yr < v x (500au/r) < 2\farcs3 per yr, corresponding to low-to-moderate eccentricities. These limits worsen gradually beyond 600 au, reaching 5–15 mJy by 1500 au.

Published
2021
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4. Atacama Cosmology Telescope: Combined kinematic and thermal Sunyaev-Zel’dovich measurements from BOSS CMASS and LOWZ halos

Author

Emmanuel Schaan, Simone Ferraro, Stefania Amodeo, Nicholas Battaglia, Simone Aiola, Jason E. Austermann, James A. Beall, Rachel Bean, Daniel T. Becker, Richard J. Bond, Erminia Calabrese, Victoria Calafut, Steve K. Choi, Edward V. Denison, Mark J. Devlin, Shannon M. Duff, Adriaan J. Duivenvoorden, Jo Dunkley, Rolando Dünner, Patricio A. Gallardo, Yilun Guan, Dongwon Han, J. Colin Hill, Gene C. Hilton, Matt Hilton, Renée Hložek, Johannes Hubmayr, Kevin M. Huffenberger, John P. Hughes, Brian J. Koopman, Amanda MacInnis, Jeff McMahon, Mathew S. Madhavacheril, Kavilan Moodley, Tony Mroczkowski, Sigurd Naess, Federico Nati, Laura B. Newburgh, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Maria Salatino, Neelima Sehgal, Alessandro Schillaci, Cristóbal Sifón, Kendrick M. Smith, David N. Spergel, Suzanne Staggs, Emilie R. Storer, Hy Trac, Joel N. Ullom, Jeff Van Lanen, Leila R. Vale, Alexander van Engelen, Mariana Vargas Magaña, Eve M. Vavagiakis, Edward J. Wollack, and Zhilei Xu

Published
2021
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5. The Atacama Cosmology Telescope: delensed power spectra and parameters

Author

Dongwon Han, Neelima Sehgal, Amanda MacInnis, Alexander van Engelen, Blake D Sherwin, Mathew S. Madhavacheril, Simone Aiola, Nicholas Battaglia, James A Beall, Daniel T Becker, Erminia Calabrese, Steve K Choi, Omar Darwish, Edward V Denison, Mark J Devlin, Jo Dunkley, Simone Ferraro, Anna E Fox, Matthew Hasselfield, J. Colin Hill, Gene C. Hilton, Matt Hilton, Renee Hlozek, Johannes Hubmayr, John P Hughes, Arthur Kosowsky, Jeff Van Lanen, Thibaut Louis, Kavilan Moodley, Sigurd Naess, Toshiya Namikawa, Federico Nati, Edward J Wollack, John P Nibarger, Michael D Niemack, Lyman A Page, Bruce Partridge, Frank J Qu, Alessandro Schillaci, David N Spergel, Suzanne Staggs, and Emilie Storer

Subjects
Optics
Abstract

We present ΛCDM cosmological parameter constraints obtained from delensed microwave background power spectra. Lensing maps from a subset of DR4 data from the Atacama Cosmology Telescope (ACT) are used to undo the lensing effect in ACT spectra observed at 150 and 98 GHz. At 150 GHz, we remove the lensing distortion with an effective efficiency of 30% (T T), 30% (EE), 26% (T E) and 20% (BB); this results in detections of the delensing effect at 8.7σ (T T), 5.1σ (EE), 2.6σ (T E), and 2.4σ (BB) significance. The combination of 150 and 98 GHz T T, EE, and T E delensed spectra is well fit by a standard ΛCDM model. We also measure the shift in best-fit parameters when fitting delensed versus lensed spectra; while this shift does not inform our ability to measure cosmological parameters, it does provide a three-way consistency check among the lensing inferred from the best-fit parameters, the lensing in the CMB power spectrum, and the reconstructed lensing map. This shift is predicted to be zero when fitting with the correct model since both lensed and delensed spectra originate from the same region of sky. Fitting with a ΛCDM model and marginalizing over foregrounds, we find that the shift in cosmological parameters is consistent with zero. Our results show that gravitational lensing of the microwave background is internally consistent within the framework of the standard cosmological model.

Published
2021
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6. The Atacama Cosmology Telescope: DR4 maps and cosmological parameters

Author

Simone Aiola, Erminia Calabrese, Loic Maurin, Sigurd Naess, Benjamin L. Schmitt, Maximilian H. Abitbol, Graeme E. Addison, Peter A. R. Ade, David Alonso, Mandana Amiri, Stefania Amodeo, Elio Angile, Jason E. Austermann, Taylor Baildon, Nick Battaglia, James A. Beall, Rachel Bean, Daniel T. Becker, J Richard Bond, Sarah Marie Bruno, Victoria Calafut, Luis E. Campusano, Felipe Carrero, Grace E. Chesmore, Hsiao-mei Cho, Steve K. Choi, Susan E. Clark, Nicholas F. Cothard, Devin Crichton, Kevin T. Crowley, Omar Darwish, Rahul Datta, Edward V. Denison, Mark J. Devlin, Cody J. Duell, Shannon M. Duff, Adriaan J. Duivenvoorden, Jo Dunkley, Rolando Dunner, Thomas Essinger-Hileman, Max Fankhanel, Simone Ferraro, Anna E. Fox, Brittany Fuzia, Patricio A. Gallardo, Vera Gluscevic, Joseph E. Golec, Emily Grace, Megan Gralla, Yilun Guan, 8 Mark Halpern, Dongwon Han, Peter Hargrave, Matthew Hasselfield, Jakob M. Helton, Shawn Henderson, Brandon Hensley, J. Colin Hill, Gene C. Hilton, Matt Hilton, Adam D. Hincks, Renee Hlozek, Shuay-Pwu Patty Ho, Johannes Hubmayr, Kevin M. Huffenberger, John P. Hughes, Leopoldo Infante, Kent Irwin, Rebecca Jackson, Jeff Klein, Kenda Knowles, Brian Koopman, Arthur Kosowsky, Vincent Lakey, Dale Li, Yaqiong Li, Zack Li, Martine Lokken, Thibaut Louis, Marius Lungu, Amanda MacInnis, Mathew Madhavacheril, Felipe Maldonado, Maya Mallaby-Kay, Danica Marsden, Jeff McMahon, Felipe Menanteau, Kavilan Moodley, Tim Morton, Toshiya Namikawa, Federico Nati, Laura Newburgh, John P. Nibarger, Andrina Nicola, Michael D. Niemack, Michael R. Nolta, John Orlowski-Sherer, Lyman A. Page, Christine G. Pappas, Bruce Partridge, Phumlani Phakathi, Giampaolo Pisano, Heather Prince, Roberto Puddu, Frank J. Qu, Jesus Rivera, Naomi Robertson, Felipe Rojas, Maria Salatino, Emmanuel Schaan, Alessandro Schillaci, Neelima Sehgal, Blake D. Sherwin, Carlos Sierra, Jon Sievers, Cristobal Sifon, Precious Sikhosana, Sara Simon, David N. Spergel, Suzanne T. Staggs, Jason Stevens, Emilie Storer, Dhaneshwar D. Sunder, Eric R. Switzer, Ben Thorne, Robert Thornton, Hy Trac, Jesse Treu, Carole Tucker, Leila R. Vale, Alexander Van Engelen, Jeff Van Lanen, Eve M. Vavagiakis, Kasey Wagoner, Yuhan Wang, Jonathan T. Ward, Edward J Wollack, Zhilei Xu, Fernando Zago, and Ningfeng Zhu

Subjects
Astrophysics, Physics Of Elementary Particles And Fields
Abstract

We present new arcminute-resolution maps of the Cosmic Microwave Background temperature and polarization anisotropy from the Atacama Cosmology Telescope, using data taken from 2013{2016 at 98 and 150 GHz. The maps cover more than 17,000 deg(^2), the deepest 600 deg(^2) with noise levels below 10µK-arcmin. We use the power spectrum derived from almost 6,000 deg(^2) of these maps to constrain cosmology. The ACT data enable a measurement of the angular scale of features in both the divergence-like polarization and the temperature anisotropy, tracing both the velocity and density at last-scattering. From these one can derive the distance to the last-scattering surface and thus infer the local expansion rate, H0. By combining ACT data with large-scale information from WMAP we measure H0 = 67:6±1:1 km/s/Mpc, at 68% confidence, in excellent agreement with the independently measured Planck satellite estimate (from ACT alone we find H0 = 67:9± 1:5 km/s/Mpc). The ΛCDM model provides a good fit to the ACT data, and we find no evidence for deviations: both the spatial curvature, and the departure from the standard lensing signal in the spectrum, are zero to within 1σ; the number of relativistic species, the primordial Helium fraction, and the running of the spectral index are consistent with ΛCDM predictions to within 1.5{2.2σ. We compare ACT, WMAP, and Planck at the parameter level and find good consistency; we investigate how the constraints on the correlated spectral index and baryon density parameters readjust when adding CMB large-scale information that ACT does not measure. The DR4 products presented here will be publicly released on the NASA Legacy Archive for Microwave Background Data Analysis.

Published
2020
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7. The Atacama Cosmology Telescope: A CMB lensing mass map over 2100 square degrees of sky and its cross-correlation with BOSS-CMASS galaxies

Author

Omar Darwish, Mathew S. Madhavacheril, Blake D. Sherwin, Simone Aiola, Nicholas Battaglia, James A. Beall, Daniel T. Becker, J. Richard Bond, Erminia Calabrese, Steve Choi, Mark J. Devlin, Jo Dunkley, Rolando Dunner, Simone Ferraro, Anna E. Fox, Patricio A. Gallardo, Yilun Guan, Mark Halpern, Dongwon Han, Matthew Hasselfield, J. Colin Hill, Gene C. Hilton, Matt Hilton, Adam D. Hincks, Shuay-Pwu Patty Ho, J. Hubmayr, John P. Hughes, Brian J. Koopman, Arthur Kosowsky, J. Van Lanen, Thibaut Louis, Marius Lungu, Amanda MacInnis, Loic Maurin, Jeffrey McMahon, Kavilan Moodley, Sigurd Naess, Toshiya Namikawa, Laura Newburgh, John P. Nibarger, Micheal D. Niemack, Lyman A. Page, Bruce Partridge, Frank J. Qu, Naomi Robertson, Benjamin Schmitt, Neelima Sehgal, Cristobal Sifon, David N. Spergel, Suzanne Staggs, Emilie Storer, Alexander van Engelen, and Edward J. Wollack

Subjects
Astronomy
Abstract

We construct cosmic microwave background lensing mass maps using data from the 2014 and 2015 seasons of observations with the Atacama Cosmology Telescope (ACT). These maps cover 2100 square degrees of sky and overlap with a wide variety of optical surveys. The maps are signal dominated on large scales and have fidelity such that their correlation with the cosmic infrared background is clearly visible by eye. We also create lensing maps with thermal Sunyaev-Zel’dovich contamination removed using a novel cleaning procedure that only slightly degrades the lensing signal-to-noise ratio. The cross-spectrum between the cleaned lensing map and the BOSS CMASS galaxy sample is detected at 10-σ significance, with an amplitude of A = 1.02±0.10 relative to the Planck best-fit LCDM cosmological model with fiducial linear galaxy bias. Our measurement lays the foundation for lensing cross-correlation science with current ACT data and beyond.

Published
2020
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8. The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light

Author

Mathew S. Madhavacheril, Cristobal Sifon, Nicholas Battaglia, Simone Aiola, Stefania Amodeo, Jason E. Austermann, James A. Beall, Daniel T. Becker, J. Richard Bond, Erminia Calabrese, Steve K. Choi, Edward V. Denison, Mark J Devlin, Simon R. Dicker, Shannon M. Duff, Adriaan J. Duivenvoorden, Jo Dunkley, Rolando Dunner, Simone Ferraro, Patricio A. Gallardo, Yilun Guan, Dongwon Han, J. Colin Hill, Gene C Hilton, Matt Hilton, Johannes Hubmayr, Kevin M. Huffenberger, John P. Hughes, Brian J. Koopman, Arthur Kosowsky, Jeff Van Lanen, Eunseong Lee, Thibaut Louis, Amanda MacInnis, Jeffrey McMahon, Kavilan Moodley, Sigurd Naess, Toshiya Namikawa, Federico Nati, Laura Newburgh, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Frank J. Qu, Naomi C. Robertson, Maria Salatino, Emmanuel Schaan, Alessandro Schillaci, Benjamin L. Schmitt, Neelima Sehgal, Blake D. Sherwin, Sara M. Simon, David N. Spergel, Suzanne Staggs, Emilie R. Storer, Joel N. Ullom, Leila R. Vale, Alexander van Engelen, Eve M. Vavagiakis, Edward J Wollack, and Zhilei Xu

Subjects
Earth Resources And Remote Sensing, Space Sciences (General)
Abstract

We use gravitational lensing of the cosmic microwave background (CMB) to measure the mass of the most distant blindly selected sample of galaxy clusters on which a lensing measurement has been performed to date. In CMB data from the the Atacama Cosmology Telescope and the Planck satellite, we detect the stacked lensing effect from 677 near-infrared-selected galaxy clusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS), which have a mean redshift of (z)=1.08. There are currently no representative optical weak lensing measurements of clusters that match the distance and average mass of this sample. We detect the lensing signal with a significance of . We model the signal with a halo model framework to find the mean mass of the population from which these clusters are drawn. Assuming that the clusters follow Navarro–Frenk–White (NFW) density profiles, we infer a mean mass of (M(500c))=(1.7 ± 0.4) x 10^14M(ʘ). We consider systematic uncertainties from cluster redshift errors, centering errors, and the shape of the NFW profile. These are all smaller than 30% of our reported uncertainty. This work highlights the potential of CMB lensing to enable cosmological constraints from the abundance of distant clusters populating ever larger volumes of the observable universe, beyond the capabilities of optical weak lensing measurements.

Published
2020
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9. Atacama Cosmology Telescope: Component-separated maps of CMB temperature and the thermal Sunyaev-Zel'dovich effect

Author

Mathew S. Madhavacheril, J. Colin Hill, Sigurd Naess, Graeme E. Addison, Simone Aiola, Taylor Baildon, Nicholas Battaglia, Rachel Bean, J. Richard Bond, Erminia Calabrese, Victoria Calafut, Steve K. Choi, Omar Darwish, Rahul Datta, Mark J. Devlin, Joanna Dunkle, Rolando Dunner, Simone Ferraro, Patricio A. Gallardo, Vera Gluscevic, Mark Halpern, Dongwon Han, Matthew Hasselfield, Matt Hilton, Adam D. Hincks, Renee Hlozek, Shuay-Pwu Patty Ho, Kevin M. Huffenberger, John P. Hughes, Brian J. Koopman, Arthur Kosowsky, Martine Lokken, Thibaut Louis, Marius Lungu, Amanda MacInnis, Loic Maurin, Jeffrey J. McMahon, Kavilan Moodley, Federico Nati, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Naomi Robertson, Neelima Sehgal, Emmanuel Schaan, Alessandro Schillaci, Blake D.Sherwin, Cristobal Sifon, Sara M. Simon, David N. Spergel, Suzanne T. Staggs, Emilie R. Storer, Alexander van Engelen, Eve M. Vavagiakis, Edward Wollack, and Zhilei Xu

Subjects
Astronomy, Astrophysics
Abstract

Optimal analyses of many signals in the cosmic microwave background (CMB) require map-level extraction of individual components in the microwave sky, rather than measurements at the power spectrum level alone. To date, nearly all map-level component separation in CMB analyses has been performed exclusively using satellite data. In this paper, we implement a component separation method based on the internal linear combination (ILC) approach which we have designed to optimally account for the anisotropic noise (in the 2D Fourier domain) often found in ground-based CMB experiments. Using this method, we combine multi-frequency data from the Planck satellite and the Atacama Cosmology Telescope Polarimeter (ACTPol) to construct the first wide area (≈2100 sq. deg.), arcminute-resolution component-separated maps of the CMB temperature anisotropy and the thermal Sunyaev-Zel'dovich (tSZ) effect sourced by the inverse-Compton scattering of CMB photons off hot, ionized gas. Our ILC pipeline allows for explicit deprojection of various contaminating signals, including a modified blackbody approximation of the cosmic infrared background (CIB) spectral energy distribution. The cleaned CMB maps will be a useful resource for CMB lensing reconstruction, kinematic SZ cross-correlations, and primordial non-Gaussianity studies. The tSZ maps will be used to study the pressure pro�les of galaxies, groups, and clusters through cross-correlations with halo catalogs, with dust contamination controlled via CIB deprojection. The data products described in this paper are available on LAMBDA.

Published
2020
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10. The Atacama Cosmology Telescope: Constraints on Cosmic Birefringence

Author

Toshiya Namikawa, Yilun Guan, Omar Darwish, Blake D. Sherwin, Simone Aiola, Nicholas Battaglia, James A. Beall, Daniel T. Becker, J. Richard Bond, Erminia Calabrese, Grace E. Chesmore, Steve K.Choi, Mark J. Devlin, Joanna Dunkley, Rolando Dunner, Anna E. Fox, Patricio A. Gallardo, Vera Gluscevic, Dongwon Han, Matthew Hasselfield, Gene C. Hilton, Adam D. Hincks, Renee Hlozek, Johannes Hubmayr, Kevin Huffenberger, John P. Hughes, Brian J. Koopman, Arthur Kosowsky, Thibaut Louis, Marius Lungu, Amanda MacInnis, Mathew S. Madhavacheril, Maya Mallaby-Kay, Loıc Maurin, Jeffrey McMahon, Kavilan Moodley, Sigurd Naess, Federico Nati, Laura B.Newburgh, John P. Nibarger, Michael D. Niemack, Lyman A. Page, Frank J. Qu, Naomi Robertson, Alessandro Schillaci, Neelima Sehgal, Cristobal Sifon, Sara M. Simon, David N. Spergel, Suzanne T.Staggs, Emilie R. Storer, Alexander van Engelen, Jeff van Lanen, and Edward J. Wollack

Subjects
Astrophysics, Space Radiation
Abstract

We present new constraints on anisotropic birefringence of the cosmic microwave background polarization using two seasons of data from the Atacama Cosmology Telescope covering 456 square degrees of sky. The birefringence power spectrum, measured using a curved-sky quadratic estimator, is consistent with zero. Our results provide the tightest current constraint on birefringence over a range of angular scales between 5 arc minutes and 9°. We improve previous upper limits on the amplitude of a scale-invariant birefringence power spectrum by a factor of between 2 and 3. Assuming a nearly massless axion field during inflation, our result is equivalent to a 2σ upper limit on the Chern-Simons coupling constant between axions and photons of g(αγ)< 4.0 × 10(exp -2)/H(I), where H(I) is the inflationary Hubble scale.

Published
2020
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11. Atacama Cosmology Telescope: Constraints on cosmic birefringence

Author

Toshiya Namikawa, Yilun Guan, Omar Darwish, Blake D. Sherwin, Simone Aiola, Nicholas Battaglia, James A. Beall, Daniel T. Becker, J. Richard Bond, Erminia Calabrese, Grace E. Chesmore, Steve K. Choi, Mark J. Devlin, Joanna Dunkley, Rolando Dünner, Anna E. Fox, Patricio A. Gallardo, Vera Gluscevic, Dongwon Han, Matthew Hasselfield, Gene C. Hilton, Adam D. Hincks, Renée Hložek, Johannes Hubmayr, Kevin Huffenberger, John P. Hughes, Brian J. Koopman, Arthur Kosowsky, Thibaut Louis, Marius Lungu, Amanda MacInnis, Mathew S. Madhavacheril, Maya Mallaby-Kay, Loïc Maurin, Jeffrey McMahon, Kavilan Moodley, Sigurd Naess, Federico Nati, Laura B. Newburgh, John P. Nibarger, Michael D. Niemack, Lyman A. Page, Frank J. Qu, Naomi Robertson, Alessandro Schillaci, Neelima Sehgal, Cristóbal Sifón, Sara M. Simon, David N. Spergel, Suzanne T. Staggs, Emilie R. Storer, Alexander van Engelen, Jeff van Lanen, and Edward J. Wollack

Published
2020
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12. Erratum: Atacama Cosmology Telescope: Modeling the gas thermodynamics in BOSS CMASS galaxies from kinematic and thermal Sunyaev-Zel’dovich measurements [Phys. Rev. D 103 , 063514 (2021)]

Author

Stefania Amodeo, Nicholas Battaglia, Emmanuel Schaan, Simone Ferraro, Emily Moser, Simone Aiola, Jason E. Austermann, James A. Beall, Rachel Bean, Daniel T. Becker, Richard J. Bond, Erminia Calabrese, Victoria Calafut, Steve K. Choi, Edward V. Denison, Mark Devlin, Shannon M. Duff, Adriaan J. Duivenvoorden, Jo Dunkley, Rolando Dünner, Patricio A. Gallardo, Kirsten R. Hall, Dongwon Han, J. Colin Hill, Gene C. Hilton, Matt Hilton, Renée Hložek, Johannes Hubmayr, Kevin M. Huffenberger, John P. Hughes, Brian J. Koopman, Amanda MacInnis, Jeff McMahon, Mathew S. Madhavacheril, Kavilan Moodley, Tony Mroczkowski, Sigurd Naess, Federico Nati, Laura B. Newburgh, Michael D. Niemack, Lyman A. Page, Bruce Partridge, Alessandro Schillaci, Neelima Sehgal, Cristóbal Sifón, David N. Spergel, Suzanne Staggs, Emilie R. Storer, Joel N. Ullom, Leila R. Vale, Alexander van Engelen, Jeff Van Lanen, Eve M. Vavagiakis, Edward J. Wollack, and Zhilei Xu

Published
2023

13. Atacama Cosmology Telescope measurements of a large sample of candidates from the Massive and Distant Clusters of WISE Survey: Sunyaev-Zeldovich effect confirmation of MaDCoWS candidates using ACT

Author

Suzanne T. Staggs, Dongwon Han, Alessandro Schillaci, Kavilan Moodley, Charles Romero, Anthony H. Gonzalez, Simon Dicker, Maria Salatino, Zhilei Xu, Tanay Bhandarkar, Mark Brodwin, Neelima Sehgal, Alex Manduca, Federico Nati, Spencer A. Stanford, Eve M. Vavagiakis, Robert Thornton, Luca Di Mascolo, Jo Dunkley, Brian J. Koopman, Matt Hilton, Bruce Partridge, Mark J. Devlin, Steve K. Choi, Edward J. Wollack, Tony Mroczkowski, Michael D. Niemack, Kenda Knowles, Lyman A. Page, Stefania Amodeo, Nick Battaglia, Cristóbal Sifón, Amanda MacInnis, Kevin M. Huffenberger, Ningfeng Zhu, John P. Hughes, Ian Lowe, John Orlowski-Scherer, Orlowski-Scherer, J, Di Mascolo, L, Bhandarkar, T, Manduca, A, Mroczkowski, T, Amodeo, S, Battaglia, N, Brodwin, M, Choi, S, Devlin, M, Dicker, S, Dunkley, J, Gonzalez, A, Han, D, Hilton, M, Huffenberger, K, Hughes, J, Macinnis, A, Knowles, K, Koopman, B, Lowe, I, Moodley, K, Nati, F, Niemack, M, Page, L, Partridge, B, Romero, C, Salatino, M, Schillaci, A, Sehgal, N, Sifon, C, Staggs, S, Stanford, S, Thornton, R, Vavagiakis, E, Wollack, E, Xu, Z, Zhu, N, Orlowski-Scherer, J., Di Mascolo, L., Bhandarkar, T., Manduca, A., Mroczkowski, T., Amodeo, S., Battaglia, N., Brodwin, M., Choi, S. K., Devlin, M., Dicker, S., Dunkley, J., Gonzalez, A. H., Han, D., Hilton, M., Huffenberger, K., Hughes, J. P., Macinnis, A., Knowles, K., Koopman, B. J., Lowe, I., Moodley, K., Nati, F., Niemack, M. D., Page, L. A., Partridge, B., Romero, C., Salatino, M., Schillaci, A., Sehgal, N., Sifon, C., Staggs, S., Stanford, S. A., Thornton, R., Vavagiakis, E. M., Wollack, E. J., Xu, Z., and Zhu, N.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Large-scale structure of Universe, FOS: Physical sciences, Context (language use), clusters: intracluster medium [Galaxies], Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, clusters: general [Galaxies], Cosmic background radiation, Radio continuum: galaxie, 01 natural sciences, Radio continuum: galaxies, galaxies [Submillimeter], Submillimeter: galaxie, Spitzer Space Telescope, Galaxies: clusters: general, Galaxies: clusters: intracluster medium, Submillimeter: galaxies, 0103 physical sciences, Galaxy formation and evolution, Cluster (physics), galaxie [Radio continuum], 010303 astronomy & astrophysics, Galaxy cluster, Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, Galaxy, 13. Climate action, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Atacama Cosmology Telescope, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Galaxy clusters are an important tool for cosmology, and their detection and characterization are key goals for current and future surveys. Using data from the Wide-field Infrared Survey Explorer (WISE), the Massive and Distant Clusters of WISE Survey (MaDCoWS) located 2,839 significant galaxy overdensities at redshifts $0.7\lesssim z\lesssim 1.5$, which included extensive follow-up imaging from the Spitzer Space Telescope to determine cluster richnesses. Concurrently, the Atacama Cosmology Telescope (ACT) has produced large area mm-wave maps in three frequency bands along with a large catalog of Sunyaev-Zeldovich (SZ) selected clusters, as part of its Data Release 5 (DR5). Using the maps and cluster catalog from DR5, we explore the scaling between SZ mass and cluster richness. We use complementary radio survey data from the Very Large Array, submillimeter data from Herschel, and ACT 224~GHz data to assess the impact of contaminating sources on the SZ signals. We then use a hierarchical Bayesian model to fit the mass-richness scaling relation. We find that MaDCoWS clusters have submillimeter contamination which is consistent with a gray-body spectrum, while the ACT clusters are consistent with no submillimeter emission on average. We find the best fit ACT SZ mass vs. MaDCoWS richness scaling relation has a slope of $\kappa = 1.84^{+0.15}_{-0.14}$, where the slope is defined as $M\propto \lambda_{15}^{\kappa}$ where $\lambda_{15}$ is the richness. Additionally, we find that the approximate level of in-fill of the ACT and MaDCoWS cluster SZ signals to be at the percent level, Comment: 25 pages, 17 Figures; accepted for publication in A&A

Published
2021

14. The Atacama Cosmology Telescope: Delensed power spectra and parameters

Author

Johannes Hubmayr, Dongwon Han, Bruce Partridge, Lyman A. Page, Emilie Storer, Simone Aiola, Sigurd Naess, Edward V. Denison, Mark J. Devlin, Anna E. Fox, Arthur Kosowsky, J. Colin Hill, Omar Darwish, Amanda MacInnis, Nicholas Battaglia, Matthew Hasselfield, Mathew S. Madhavacheril, John P. Nibarger, Gene C. Hilton, Thibaut Louis, Federico Nati, Edward J. Wollack, Blake D. Sherwin, Neelima Sehgal, Simone Ferraro, Renée Hložek, John P. Hughes, Michael D. Niemack, Daniel T. Becker, Steve K. Choi, Frank J. Qu, Suzanne T. Staggs, David N. Spergel, Kavilan Moodley, Matt Hilton, Alexander van Engelen, James A. Beall, Alessandro Schillaci, Toshiya Namikawa, Erminia Calabrese, Jo Dunkley, Jeff Van Lanen, Han, D, Sehgal, N, Macinnis, A, van Engelen, A, Sherwin, B, Madhavacheril, M, Aiola, S, Battaglia, N, Beall, J, Becker, D, Calabrese, E, Choi, S, Darwish, O, Denison, E, Devlin, M, Dunkley, J, Ferraro, S, Fox, A, Hasselfield, M, Colin Hill, J, Hilton, G, Hilton, M, Hlozek, R, Hubmayr, J, Hughes, J, Kosowsky, A, van Lanen, J, Louis, T, Moodley, K, Naess, S, Namikawa, T, Nati, F, Nibarger, J, Niemack, M, Page, L, Partridge, B, Qu, F, Schillaci, A, Spergel, D, Staggs, S, Storer, E, Wollack, E, Laboratoire de l'Accélérateur Linéaire (LAL), 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), and ACT

Subjects
cosmological model, Cosmology and Nongalactic Astrophysics (astro-ph.CO), media_common.quotation_subject, Cosmic microwave background, FOS: Physical sciences, Lambda-CDM model, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, weak gravitational lensing, 01 natural sciences, Atomic, Spectral line, microwaves: background, High Energy Physics - Phenomenology (hep-ph), Particle and Plasma Physics, statistical analysis, gravitation: lens, 0103 physical sciences, Nuclear, cosmic background radiation: power spectrum, Weak gravitational lensing, 010303 astronomy & astrophysics, media_common, Physics, 010308 nuclear & particles physics, Spectral density, cosmological parameters from CMBR, Molecular, Astronomy and Astrophysics, hep-ph, Nuclear & Particles Physics, Cosmological parameters from CMBR, High Energy Physics - Phenomenology, Gravitational lens, background: power spectrum, Sky, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Atacama Cosmology Telescope, astro-ph.CO, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present LCDM cosmological parameter constraints obtained from delensed microwave background power spectra. Lensing maps from a subset of DR4 data from the Atacama Cosmology Telescope (ACT) are used to undo the lensing effect in ACT spectra observed at 150 and 98 GHz. At 150 GHz, we remove the lensing distortion with an effective efficiency of 30% (TT), 30% (EE), 26% (TE) and 20% (BB); this results in detections of the delensing effect at 8.7 sigma (TT), 5.1 sigma (EE), 2.6 sigma (TE), and 2.4 sigma (BB) significance. The combination of 150 and 98 GHz TT, EE, and TE delensed spectra is well fit by a standard LCDM model. We also measure the shift in best-fit parameters when fitting delensed versus lensed spectra; while this shift does not inform our ability to measure cosmological parameters, it does provide a three-way consistency check among the lensing inferred from the best-fit parameters, the lensing in the CMB power spectrum, and the reconstructed lensing map. This shift is predicted to be zero when fitting with the correct model since both lensed and delensed spectra originate from the same region of sky. Fitting with a LCDM model and marginalizing over foregrounds, we find that the shift in cosmological parameters is consistent with zero. Our results show that gravitational lensing of the microwave background is internally consistent within the framework of the standard cosmological model., 29 pages, 17 figures, version matches that accepted by JCAP

Published
2021

15. The Atacama Cosmology Telescope: Summary of DR4 and DR5 Data Products and Data Access

Author

Joseph E. Golec, Shannon M. Duff, Maya Mallaby-Kay, Thibaut Louis, Lyman A. Page, Erminia Calabrese, E. V. Denison, Yilun Guan, Edward J. Wollack, Kavilan Moodley, Jason E. Austermann, Daniel T. Becker, John P. Hughes, Joel N. Ullom, Leila R. Vale, Simone Aiola, Dongwon Han, C. Sifon, John P. Nibarger, Sara M. Simon, Toshiya Namikawa, Kyra Fichman, Zhilei Xu, Blake D. Sherwin, Jo Dunkley, Maria Salatino, Brian J. Koopman, Emmanuel Schaan, Kevin M. Huffenberger, Johannes Hubmayr, Jeff McMahon, Matt Hilton, Simone Ferraro, Matthew Hasselfield, Laura Newburgh, Mark J. Devlin, Zachary Atkins, Patricio A. Gallardo, James A. Beall, Mathew S. Madhavacheril, Kevin T. Crowley, J. Colin Hill, Steve K. Choi, Suzanne T. Staggs, Amanda MacInnis, Alessandro Schillaci, Adriaan J. Duivenvoorden, Omar Darwish, Grace E. Chesmore, Neelima Sehgal, S. Amodeo, Gene C. Hilton, Emilie R. Storer, Sigurd Naess, Jeff Van Lanen, J. Richard Bond, Alexander van Engelen, Federico Nati, Michael D. Niemack, Renée Hložek, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Mallaby-Kay, M, Atkins, Z, Aiola, S, Amodeo, S, Austermann, J, Beall, J, Becker, D, Bond, J, Calabrese, E, Chesmore, G, Choi, S, Crowley, K, Darwish, O, Denison, E, Devlin, M, Duff, S, Duivenvoorden, A, Dunkley, J, Ferraro, S, Fichman, K, Gallardo, P, Golec, J, Guan, Y, Han, D, Hasselfield, M, Hill, J, Hilton, G, Hilton, M, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, J, Koopman, B, Louis, T, Macinnis, A, Madhavacheril, M, Mcmahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Nibarger, J, Niemack, M, Page, L, Salatino, M, Schaan, E, Schillaci, A, Sehgal, N, Sherwin, B, Sifon, C, Simon, S, Staggs, S, Storer, E, Ullom, J, Van Engelen, A, Van Lanen, J, Vale, L, Wollack, E, and Xu, Z

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Data products, Art history, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astronomy & Astrophysics, 01 natural sciences, Atomic, Public access, Particle and Plasma Physics, 0103 physical sciences, Nuclear, 010303 astronomy & astrophysics, Order (virtue), Astrophysics::Galaxy Astrophysics, Physics, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Molecular, Astronomy and Astrophysics, CMB, Cosmology, Space and Planetary Science, Atacama Cosmology Telescope, astro-ph.CO, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astronomical and Space Sciences, Physical Chemistry (incl. Structural), Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Two recent large data releases for the Atacama Cosmology Telescope (ACT), called DR4 and DR5, are available for public access. These data include temperature and polarization maps that cover nearly half the sky at arcminute resolution in three frequency bands; lensing maps and component-separated maps covering ~ 2,100 deg^2 of sky; derived power spectra and cosmological likelihoods; a catalog of over 4,000 galaxy clusters; and supporting ancillary products including beam functions and masks. The data and products are described in a suite of ACT papers; here we provide a summary. In order to facilitate ease of access to these data we present a set of Jupyter IPython notebooks developed to introduce users to DR4, DR5, and the tools needed to analyze these data. The data products (excluding simulations) and the set of notebooks are publicly available on the NASA Legacy Archive for Microwave Background Data Analysis (LAMBDA); simulation products are available on the National Energy Research Scientific Computing Center (NERSC)., Accepted to ApJS. 21 pages, 8 figures. Data and notebooks available on LAMBDA https://lambda.gsfc.nasa.gov/product/act/

Published
2021

16. The Atacama Cosmology Telescope: A Search for Planet 9

Author

Naess, S, Aiola, S, Battaglia, N, Bond, R, Calabrese, E, Choi, S, Cothard, N, Halpern, M, Colin Hill, J, Koopman, B, Devlin, M, Mcmahon, J, Dicker, S, Duivenvoorden, A, Dunkley, J, Fanfani, V, Ferraro, S, Gallardo, P, Guan, Y, Han, D, Hasselfield, M, Hincks, A, Huffenberger, K, Kosowsky, A, Louis, T, Macinnis, A, Madhavacheril, M, Nati, F, Niemack, M, Page, L, Salatino, M, Schaan, E, Orlowski-Scherer, J, Schillaci, A, Schmitt, B, Sehgal, N, Sif??n, C, Staggs, S, Van Engelen, A, Wollack, E, Sigurd Naess, Simone Aiola, Nick Battaglia, Richard J. Bond, Erminia Calabrese, Steve K. Choi, Nicholas F. Cothard, Mark Halpern, J. Colin Hill, Brian J. Koopman, Mark Devlin, Jeff McMahon, Simon Dicker, Adriaan J. Duivenvoorden, Jo Dunkley, Valentina Fanfani, Simone Ferraro, Patricio A. Gallardo, Yilun Guan, Dongwon Han, Matthew Hasselfield, Adam D. Hincks, Kevin Huffenberger, Arthur B. Kosowsky, Thibaut Louis, Amanda Macinnis, Mathew S. Madhavacheril, Federico Nati, Michael D. Niemack, Lyman Page, Maria Salatino, Emmanuel Schaan, John Orlowski-Scherer, Alessandro Schillaci, Benjamin Schmitt, Neelima Sehgal, Crist??bal Sif??n, Suzanne Staggs, Alexander Van Engelen, Edward J. Wollack, Naess, S, Aiola, S, Battaglia, N, Bond, R, Calabrese, E, Choi, S, Cothard, N, Halpern, M, Colin Hill, J, Koopman, B, Devlin, M, Mcmahon, J, Dicker, S, Duivenvoorden, A, Dunkley, J, Fanfani, V, Ferraro, S, Gallardo, P, Guan, Y, Han, D, Hasselfield, M, Hincks, A, Huffenberger, K, Kosowsky, A, Louis, T, Macinnis, A, Madhavacheril, M, Nati, F, Niemack, M, Page, L, Salatino, M, Schaan, E, Orlowski-Scherer, J, Schillaci, A, Schmitt, B, Sehgal, N, Sif??n, C, Staggs, S, Van Engelen, A, Wollack, E, Sigurd Naess, Simone Aiola, Nick Battaglia, Richard J. Bond, Erminia Calabrese, Steve K. Choi, Nicholas F. Cothard, Mark Halpern, J. Colin Hill, Brian J. Koopman, Mark Devlin, Jeff McMahon, Simon Dicker, Adriaan J. Duivenvoorden, Jo Dunkley, Valentina Fanfani, Simone Ferraro, Patricio A. Gallardo, Yilun Guan, Dongwon Han, Matthew Hasselfield, Adam D. Hincks, Kevin Huffenberger, Arthur B. Kosowsky, Thibaut Louis, Amanda Macinnis, Mathew S. Madhavacheril, Federico Nati, Michael D. Niemack, Lyman Page, Maria Salatino, Emmanuel Schaan, John Orlowski-Scherer, Alessandro Schillaci, Benjamin Schmitt, Neelima Sehgal, Crist??bal Sif??n, Suzanne Staggs, Alexander Van Engelen, and Edward J. Wollack

Abstract

We use Atacama Cosmology Telescope (ACT) observations at 98 GHz (2015-2019), 150 GHz (2013-2019), and 229 GHz (2017-2019) to perform a blind shift-and-stack search for Planet 9. The search explores distances from 300 au to 2000 au and velocities up to 6.'3 per year, depending on the distance (r). For a 5 Earth-mass Planet 9 the detection limit varies from 325 au to 625 au, depending on the sky location. For a 10 Earth-mass planet the corresponding range is 425 au to 775 au. The predicted aphelion and most likely location of the planet corresponds to the shallower end of these ranges. The search covers the whole 18,000 square degrees of the ACT survey. No significant detections are found, which is used to place limits on the millimeter-wave flux density of Planet 9 over much of its orbit. Overall we eliminate roughly 17% and 9% of the parameter space for a 5 and 10 Earth-mass Planet 9, respectively. These bounds approach those of a recent INPOP19a ephemeris-based analysis, but do not exceed it. We also provide a list of the 10 strongest candidates from the search for possible follow-up. More generally, we exclude (at 95% confidence) the presence of an unknown solar system object within our survey area brighter than 4-12 mJy (depending on position) at 150 GHz with current distance 300 au < r < 600 au and heliocentric angular velocity 1.'5 yr(-1) < nu.500 au/r< 2.'' 3 yr(-1), corresponding to low-to-moderate eccentricities. These limits worsen gradually beyond 600 au, reaching 5-15 mJy by 1500 au.

Published
2021

17. Theology and Star Trek

Author

Shaun C. Brown, Amanda MacInnis Hackney, Shaun C. Brown, and Amanda MacInnis Hackney

Subjects
Television programs--Religious aspects, Star Trek television programs--History and criticism, Motion pictures--Religious aspects, Star Trek films--History and criticism
Abstract

After Star Trek: Enterprise concluded in 2005, Star Trek went on hiatus until the 2009 film Star Trek and its sequels. With the success of these films, Star Trek returned to the small screen with series like Discovery, Picard, and Strange New Worlds. These films and series, in different ways, reflect cultural shifts in Western society. Theology and Star Trek gathers a group of scholars from various religious and theological disciplines to reflect upon the connection between theology and Star Trek anew. The essays in part one, “These are the Voyages,” explore the overarching themes of Star Trek and the thought of its creator, Gene Roddenberry. Part two, “Strange New Worlds,” discusses politics and technology. Part three, “To Explore and to Seek,” focuses on issues related to practice and formation. Part four, “To Boldly Go,” contemplates the future of Star Trek.

Published
2023

18. Atacama Cosmology Telescope: component-separated maps of CMB temperature and the thermal Sunyaev-Zel’dovich effect

Author

Simone Aiola, Michael D. Niemack, Federico Nati, C. Sifon, Brian J. Koopman, Kavilan Moodley, Victoria Calafut, Graeme E. Addison, Jeff McMahon, Matthew Hasselfield, Matt Hilton, Arthur Kosowsky, Nicholas Battaglia, Erminia Calabrese, Alexander van Engelen, Edward J. Wollack, David N. Spergel, Marius Lungu, Joanna Dunkley, J. Richard Bond, Renée Hložek, Alessandro Schillaci, Suzanne T. Staggs, Eve M. Vavagiakis, Kevin M. Huffenberger, Shuay-Pwu Patty Ho, Emmanuel Schaan, Mark Halpern, Simone Ferraro, Vera Gluscevic, Mark J. Devlin, Mathew S. Madhavacheril, Patricio A. Gallardo, Thibaut Louis, Zhilei Xu, Taylor Baildon, Neelima Sehgal, Steve K. Choi, Bruce Partridge, Amanda MacInnis, Lyman A. Page, Loïc Maurin, J. Colin Hill, Naomi Robertson, Blake D. Sherwin, Rachel Bean, Emilie R. Storer, Sigurd Naess, Adam D. Hincks, Rahul Datta, Dongwon Han, Martine Lokken, John P. Hughes, Omar Darwish, Rolando Dünner, Sara M. Simon, Laboratoire de l'Accélérateur Linéaire (LAL), 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), 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), 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), Madhavacheril, M, Hill, J, Naess, S, Addison, G, Aiola, S, Baildon, T, Battaglia, N, Bean, R, Bond, J, Calabrese, E, Calafut, V, Choi, S, Darwish, O, Datta, R, Devlin, M, Dunkley, J, Dunner, R, Ferraro, S, Gallardo, P, Gluscevic, V, Halpern, M, Han, D, Hasselfield, M, Hilton, M, Hincks, A, Hlozek, R, Ho, S, Huffenberger, K, Hughes, J, Koopman, B, Kosowsky, A, Lokken, M, Louis, T, Lungu, M, Macinnis, A, Maurin, L, Mcmahon, J, Moodley, K, Nati, F, Niemack, M, Page, L, Partridge, B, Robertson, N, Sehgal, N, Schaan, E, Schillaci, A, Sherwin, B, Sifon, C, Simon, S, Spergel, D, Staggs, S, Storer, E, Van Engelen, A, Vavagiakis, E, Wollack, E, and Xu, Z

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), astro-ph.GA, Cosmic microwave background, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, CMB, Sunyaev–Zel'dovich effect, Atomic, 01 natural sciences, symbols.namesake, Particle and Plasma Physics, Cosmic infrared background, 0103 physical sciences, Nuclear, Black-body radiation, Planck, 010306 general physics, Astrophysics::Galaxy Astrophysics, Physics, Quantum Physics, 010308 nuclear & particles physics, Astrophysics::Instrumentation and Methods for Astrophysics, Molecular, Astrophysics - Astrophysics of Galaxies, Nuclear & Particles Physics, Galaxy, Cosmology, 13. Climate action, Astrophysics of Galaxies (astro-ph.GA), Atacama Cosmology Telescope, astro-ph.CO, symbols, Spectral energy distribution, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Optimal analyses of many signals in the cosmic microwave background (CMB) require map-level extraction of individual components in the microwave sky, rather than measurements at the power spectrum level alone. To date, nearly all map-level component separation in CMB analyses has been performed exclusively using satellite data. In this paper, we implement a component separation method based on the internal linear combination (ILC) approach which we have designed to optimally account for the anisotropic noise (in the 2D Fourier domain) often found in ground-based CMB experiments. Using this method, we combine multi-frequency data from the Planck satellite and the Atacama Cosmology Telescope Polarimeter (ACTPol) to construct the first wide-area, arcminute-resolution component-separated maps (covering approximately 2100 sq. deg.) of the CMB temperature anisotropy and the thermal Sunyaev-Zel'dovich (tSZ) effect sourced by the inverse-Compton scattering of CMB photons off hot, ionized gas. Our ILC pipeline allows for explicit deprojection of various contaminating signals, including a modified blackbody approximation of the cosmic infrared background (CIB) spectral energy distribution. The cleaned CMB maps will be a useful resource for CMB lensing reconstruction, kinematic SZ cross-correlations, and primordial non-Gaussianity studies. The tSZ maps will be used to study the pressure profiles of galaxies, groups, and clusters through cross-correlations with halo catalogs, with dust contamination controlled via CIB deprojection. The data products described in this paper are available on LAMBDA., Comment: 24 pages, 11 figures, matches version accepted by PRD. Data products are available on LAMBDA at https://lambda.gsfc.nasa.gov/product/act/act_dr4_derived_maps_get.cfm

Published
2020

19. The Atacama Cosmology Telescope: A Measurement of the Cosmic Microwave Background Power Spectra at 98 and 150 GHz

Author

Kavilan Moodley, Emilie R. Storer, Simone Aiola, Phumlani Phakathi, Jeff Van Lanen, E. Grace, Stefania Amodeo, Felipe Rojas, Yaqiong Li, Nick Battaglia, Precious Sikhosana, Suzanne T. Staggs, Vera Gluscevic, Robert Thornton, Benjamin L. Schmitt, Christine G. Pappas, Rolando Dünner, Danica Marsden, Yilun Guan, Felipe Carrero, Blake D. Sherwin, Sigurd Naess, Leopoldo Infante, Adam D. Hincks, Toshiya Namikawa, Zhilei Xu, Brittany Fuzia, Graeme E. Addison, Kasey Wagoner, Daniel T. Becker, J. Richard Bond, Jason E. Austermann, Sarah Marie Bruno, Matthew Hasselfield, Naomi Robertson, Jesse Treu, Vincent Lakey, John P. Nibarger, Timothy D. Morton, Sara M. Simon, David N. Spergel, Jesus Rivera, Michael R. Nolta, Zack Li, Shawn W. Henderson, Max Fankhanel, Martine Lokken, B. Thorne, Mark J. Devlin, Thomas Essinger-Hileman, James A. Beall, Yuhan Wang, Kevin T. Crowley, John Orlowski-Sherer, Bruce Partridge, Adriaan J. Duivenvoorden, Laura Newburgh, Grace E. Chesmore, Alessandro Schillaci, Jon Sievers, Dhaneshwar D. Sunder, Federico Nati, Rahul Datta, Dale Li, Shuay-Pwu Patty Ho, Shannon M. Duff, Edward V. Denison, Peter A. R. Ade, Mathew S. Madhavacheril, Maya Mallaby-Kay, Erminia Calabrese, Roberto Puddu, J. Colin Hill, Elio Angile, Jo Dunkley, Omar Darwish, Kenda Knowles, Marius Lungu, Megan Gralla, Susan E. Clark, Jeff Klein, Fernando Zago, Dongwon Han, Brandon S. Hensley, Devin Crichton, Renée Hložek, Peter Charles Hargrave, Frank J. Qu, Neelima Sehgal, Leila R. Vale, Matt Hilton, Gene C. Hilton, Joseph E. Golec, Heather Prince, Mandana Amiri, Alexander van Engelen, Maria Salatino, Loïc Maurin, Andrina Nicola, Lyman A. Page, Thibaut Louis, Steve K. Choi, Michael D. Niemack, Eve M. Vavagiakis, Nicholas F. Cothard, Victoria Calafut, Jonathan T. Ward, Carole Tucker, Arthur Kosowsky, Kevin M. Huffenberger, Kent D. Irwin, Hsiao-Mei Cho, Edward J. Wollack, Anna E. Fox, Ningfeng Zhu, Amanda MacInnis, Felipe Maldonado, Brian J. Koopman, Jeff McMahon, Cristóbal Sifón, Emmanuel Schaan, Johannes Hubmayr, Mark Halpern, Simone Ferraro, Hy Trac, Patricio A. Gallardo, Maximilian H. Abitbol, Taylor Baildon, Luis E. Campusano, Rebecca Jackson, Carlos Sierra, Felipe Menanteau, Jason R. Stevens, John P. Hughes, Cody J. Duell, Eric R. Switzer, Kirsten Hall, Rachel Bean, David Alonso, Choi, S, Hasselfield, M, Ho, S, Koopman, B, Lungu, M, Abitbol, M, Addison, G, Ade, P, Aiola, S, Alonso, D, Amiri, M, Amodeo, S, Angile, E, Austermann, J, Baildon, T, Battaglia, N, Beall, J, Bean, R, Becker, D, Richard Bond, J, Bruno, S, Calabrese, E, Calafut, V, Campusano, L, Carrero, F, Chesmore, G, Cho, H, Clark, S, Cothard, N, Crichton, D, Crowley, K, Darwish, O, Datta, R, Denison, E, Devlin, M, Duell, C, Duff, S, Duivenvoorden, A, Dunkley, J, Dunner, R, Essinger-Hileman, T, Fankhanel, M, Ferraro, S, Fox, A, Fuzia, B, Gallardo, P, Gluscevic, V, Golec, J, Grace, E, Gralla, M, Guan, Y, Hall, K, Halpern, M, Han, D, Hargrave, P, Henderson, S, Hensley, B, Colin Hill, J, Hilton, G, Hilton, M, Hincks, A, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, J, Infante, L, Irwin, K, Jackson, R, Klein, J, Knowles, K, Kosowsky, A, Lakey, V, Li, D, Li, Y, Li, Z, Lokken, M, Louis, T, Macinnis, A, Madhavacheril, M, Maldonado, F, Mallaby-Kay, M, Marsden, D, Maurin, L, Mcmahon, J, Menanteau, F, Moodley, K, Morton, T, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Nibarger, J, Nicola, A, Niemack, M, Nolta, M, Orlowski-Sherer, J, Page, L, Pappas, C, Partridge, B, Phakathi, P, Prince, H, Puddu, R, Qu, F, Rivera, J, Robertson, N, Rojas, F, Salatino, M, Schaan, E, Schillaci, A, Schmitt, B, Sehgal, N, Sherwin, B, Sierra, C, Sievers, J, Sifon, C, Sikhosana, P, Simon, S, Spergel, D, Staggs, S, Stevens, J, Storer, E, Sunder, D, Switzer, E, Thorne, B, Thornton, R, Trac, H, Treu, J, Tucker, C, Vale, L, van Engelen, A, van Lanen, J, Vavagiakis, E, Wagoner, K, Wang, Y, Ward, J, Wollack, E, Xu, Z, Zago, F, Zhu, N, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), 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), and ACT

Subjects
Physics, CMBR polarisation, Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010308 nuclear & particles physics, Cosmic microwave background, Library science, FOS: Physical sciences, Astronomy and Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, 01 natural sciences, Cosmological parameters from CMBR, 0103 physical sciences, Atacama Cosmology Telescope, CMBR experiment, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We present the temperature and polarization angular power spectra of the CMB measured by the Atacama Cosmology Telescope (ACT) from 5400 deg$^2$ of the 2013-2016 survey, which covers $>$15000 deg$^2$ at 98 and 150 GHz. For this analysis we adopt a blinding strategy to help avoid confirmation bias and, related to this, show numerous checks for systematic error done before unblinding. Using the likelihood for the cosmological analysis we constrain secondary sources of anisotropy and foreground emission, and derive a "CMB-only" spectrum that extends to $\ell=4000$. At large angular scales, foreground emission at 150 GHz is $\sim$1% of TT and EE within our selected regions and consistent with that found by Planck. Using the same likelihood, we obtain the cosmological parameters for $\Lambda$CDM for the ACT data alone with a prior on the optical depth of $\tau=0.065\pm0.015$. $\Lambda$CDM is a good fit. The best-fit model has a reduced $\chi^2$ of 1.07 (PTE=0.07) with $H_0=67.9\pm1.5$ km/s/Mpc. We show that the lensing BB signal is consistent with $\Lambda$CDM and limit the celestial EB polarization angle to $\psi_P =-0.07^{\circ}\pm0.09^{\circ}$. We directly cross correlate ACT with Planck and observe generally good agreement but with some discrepancies in TE. All data on which this analysis is based will be publicly released., Comment: 44 pages, 27 figures, products available on the NASA LAMBDA website, version accepted for publication in JCAP

Published
2020
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20. Atacama Cosmology Telescope: Constraints on cosmic birefringence

Author

Michael D. Niemack, Mathew S. Madhavacheril, Sigurd Naess, J. Richard Bond, Adam D. Hincks, Neelima Sehgal, Kavilan Moodley, Loïc Maurin, Thibaut Louis, Joanna Dunkley, Grace E. Chesmore, Frank J. Qu, Omar Darwish, Johannes Hubmayr, Simone Aiola, Gene C. Hilton, Lyman A. Page, Toshiya Namikawa, Rolando Dünner, Maya Mallaby-Kay, C. Sifon, Mark J. Devlin, Patricio A. Gallardo, Daniel T. Becker, Amanda MacInnis, Alexander van Engelen, Renée Hložek, John P. Nibarger, Sara M. Simon, Emilie R. Storer, Matthew Hasselfield, Blake D. Sherwin, Kevin M. Huffenberger, Yilun Guan, Laura Newburgh, Vera Gluscevic, Arthur Kosowsky, Jeff Van Lanen, Edward J. Wollack, Anna E. Fox, Brian J. Koopman, Erminia Calabrese, Jeff McMahon, James A. Beall, Steve K. Choi, Alessandro Schillaci, Naomi Robertson, Nicholas Battaglia, Marius Lungu, John P. Hughes, Suzanne T. Staggs, David N. Spergel, Federico Nati, Dongwon Han, Namikawa, T, Guan, Y, Darwish, O, Sherwin, B, Aiola, S, Battaglia, N, Beall, J, Becker, D, Bond, J, Calabrese, E, Chesmore, G, Choi, S, Devlin, M, Dunkley, J, Dunner, R, Fox, A, Gallardo, P, Gluscevic, V, Han, D, Hasselfield, M, Hilton, G, Hincks, A, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, J, Koopman, B, Kosowsky, A, Louis, T, Lungu, M, Macinnis, A, Madhavacheril, M, Mallaby-Kay, M, Maurin, L, Mcmahon, J, Moodley, K, Naess, S, Nati, F, Newburgh, L, Nibarger, J, Niemack, M, Page, L, Qu, F, Robertson, N, Schillaci, A, Sehgal, N, Sifon, C, Simon, S, Spergel, D, Staggs, S, Storer, E, Van Engelen, A, Van Lanen, J, Wollack, E, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), Institut d'astrophysique spatiale (IAS), and Université Paris-Sud - Paris 11 (UP11)-Institut national des sciences de l'Univers (INSU - CNRS)-Centre National de la Recherche Scientifique (CNRS)

Subjects
data analysis method, cosmological model, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Cosmic microwave background, cosmic background radiation: polarization, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, power spectrum, 01 natural sciences, 7. Clean energy, Cosmology, High Energy Physics - Experiment, current: constraint, High Energy Physics - Experiment (hep-ex), High Energy Physics - Phenomenology (hep-ph), statistical analysis, 0103 physical sciences, [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex], Cosmic Birefringence, CMB, Cosmology, inflation, 010303 astronomy & astrophysics, Axion, Physics, Birefringence, birefringence, 010308 nuclear & particles physics, Chern-Simons term, photon, coupling constant, Polarization (waves), Massless particle, High Energy Physics - Phenomenology, Amplitude, axion, [PHYS.HPHE]Physics [physics]/High Energy Physics - Phenomenology [hep-ph], Atacama Cosmology Telescope, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics, cosmic background radiation: anisotropy
Abstract

We present new constraints on anisotropic birefringence of the cosmic microwave background polarization using two seasons of data from the Atacama Cosmology Telescope covering $456$ square degrees of sky. The birefringence power spectrum, measured using a curved-sky quadratic estimator, is consistent with zero. Our results provide the tightest current constraint on birefringence over a range of angular scales between $5$ arcminutes and $9$ degrees. We improve previous upper limits on the amplitude of a scale-invariant birefringence power spectrum by a factor of between $2$ and $3$. Assuming a nearly-massless axion field during inflation, our result is equivalent to a $2\,\sigma$ upper limit on the Chern-Simons coupling constant between axions and photons of $g_{\alpha\gamma}, Comment: 18 pages, 3 figures, Accepted for publication in PRD

Published
2020

21. The Atacama Cosmology Telescope: Modeling the Gas Thermodynamics in BOSS CMASS galaxies from Kinematic and Thermal Sunyaev-Zel'dovich Measurements

Author

Bruce Partridge, Zhilei Xu, Suzanne T. Staggs, Rolando Dünner, Emmanuel Schaan, Johannes Hubmayr, Federico Nati, Simone Ferraro, Michael D. Niemack, E. V. Denison, Victoria Calafut, Mark J. Devlin, Patricio A. Gallardo, Erminia Calabrese, Tony Mroczkowski, Jo Dunkley, Laura Newburgh, John P. Hughes, Emilie R. Storer, Eve M. Vavagiakis, Leila R. Vale, David N. Spergel, Edward J. Wollack, Joel N. Ullom, Dongwon Han, Shannon M. Duff, Jeff Van Lanen, Simone Aiola, Daniel T. Becker, Brian J. Koopman, James A. Beall, C. Sifon, Alessandro Schillaci, Jason E. Austermann, Lyman A. Page, Jeff McMahon, Sigurd Naess, Nicholas Battaglia, Matt Hilton, S. Amodeo, Renée Hložek, Gene C. Hilton, Alexander van Engelen, Steve K. Choi, J. Colin Hill, Richard J. Bond, Emily Moser, Mathew S. Madhavacheril, Neelima Sehgal, Kirsten Hall, Rachel Bean, Kevin M. Huffenberger, Amanda MacInnis, Adriaan J. Duivenvoorden, Kavilan Moodley, Amodeo, S, Battaglia, N, Schaan, E, Ferraro, S, Moser, E, Aiola, S, Austermann, J, Beall, J, Bean, R, Becker, D, Bond, R, Calabrese, E, Calafut, V, Choi, S, Denison, E, Devlin, M, Duff, S, Duivenvoorden, A, Dunkley, J, Dunner, R, Gallardo, P, Hall, K, Han, D, Hill, J, Hilton, G, Hilton, M, Hlozek, R, Hubmayr, J, Huffenberger, K, Hughes, J, Koopman, B, Macinnis, A, Mcmahon, J, Madhavacheril, M, Moodley, K, Mroczkowski, T, Naess, S, Nati, F, Newburgh, L, Niemack, M, Page, L, Partridge, B, Schillaci, A, Sehgal, N, Sifon, C, Spergel, D, Staggs, S, Storer, E, Ullom, J, Vale, L, Van Engelen, A, Van Lanen, J, Vavagiakis, E, Wollack, E, and Xu, Z

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Stellar mass, astro-ph.GA, Thermodynamics, FOS: Physical sciences, Bioengineering, Astrophysics::Cosmology and Extragalactic Astrophysics, CMB, Atomic, 01 natural sciences, Virial theorem, Particle and Plasma Physics, Intracluster medium, 0103 physical sciences, Nuclear, 010306 general physics, Astrophysics::Galaxy Astrophysics, Physics, Quantum Physics, 010308 nuclear & particles physics, Molecular, Radius, Nuclear & Particles Physics, Astrophysics - Astrophysics of Galaxies, Galaxy, Baryon, Amplitude, Astrophysics of Galaxies (astro-ph.GA), Atacama Cosmology Telescope, astro-ph.CO, Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

The thermal and kinematic Sunyaev-Zel'dovich effects (tSZ, kSZ) probe the thermodynamic properties of the circumgalactic and intracluster medium (CGM and ICM) of galaxies, groups, and clusters, since they are proportional, respectively, to the integrated electron pressure and momentum along the line-of-sight. We present constraints on the gas thermodynamics of CMASS galaxies in the Baryon Oscillation Spectroscopic Survey (BOSS) using new measurements of the kSZ and tSZ signals obtained in a companion paper. Combining kSZ and tSZ measurements, we measure within our model the amplitude of energy injection $\epsilon M_\star c^2$, where $M_\star$ is the stellar mass, to be $\epsilon=(40\pm9)\times10^{-6}$, and the amplitude of the non-thermal pressure profile to be $\alpha_{\rm Nth}, Comment: Corrected error in the algorithm that calculates the kSZ temperature profile for a given GNFW density model. The value of $\log_{\rm10} \rho_0$ changed by 0.75$\sigma$ in Tab.II and Fig.2, and affected the results in the left panels of Fig. 6. Conclusions are unchanged. Erratum published at https://link.aps.org/doi/10.1103/PhysRevD.107.049903

Published
2020
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22. Excess volumes, partial molar and adiabatic compressibilities of binary mixtures ofn-alcohols with monoethanolamine

Author

Rama M. Palepu, Jonathan R. Moulins, Amanda MacInnis, and Rebecca Dean

Subjects
Molar, Chemistry, N alcohols, Speed of sound, Materials Chemistry, Thermodynamics, Binary number, Partial molar property, Physics::Chemical Physics, Physical and Theoretical Chemistry, Condensed Matter Physics, Adiabatic process, Electronic, Optical and Magnetic Materials
Abstract

Speed of sound and densities of solution mixtures of four aliphatic alcohols with monoethanolamine were measured over a full range of composition. The density measurements were carried out from 298 to 358 K. Results of these measurements were used to calculate adiabatic compressibilities, excess adiabatic compressibilities, excess volumes and partial molar quantities. From the analysis of the results, the nature of interaction between the aliphatic alcohols and monoethanolamine is deduced.

Published
2009

23. The Atacama Cosmology Telescope: Weighing Distant Clusters with the Most Ancient Light

Author

Nicholas Battaglia, Johannes Hubmayr, Laura Newburgh, Kavilan Moodley, Rolando Dünner, Suzanne T. Staggs, Adriaan J. Duivenvoorden, Amanda MacInnis, Sigurd Naess, Shannon M. Duff, Edward V. Denison, J. Colin Hill, Steve K. Choi, David N. Spergel, Dongwon Han, Kevin M. Huffenberger, J. Richard Bond, Frank J. Qu, Eve M. Vavagiakis, Gene C. Hilton, Jason E. Austermann, Emilie Storer, Benjamin L. Schmitt, Federico Nati, Blake D. Sherwin, Mark J. Devlin, Sara M. Simon, Arthur Kosowsky, Brian J. Koopman, Jeff McMahon, Maria Salatino, Toshiya Namikawa, Zhilei Xu, Matt Hilton, Jeff Van Lanen, Alexander van Engelen, Joel N. Ullom, Neelima Sehgal, Stefania Amodeo, Mathew S. Madhavacheril, Cristóbal Sifón, John P. Hughes, Eunseong Lee, Emmanuel Schaan, Simone Ferraro, Bruce Partridge, Simon Dicker, N. C. Robertson, James A. Beall, Patricio A. Gallardo, Yilun Guan, Alessandro Schillaci, Erminia Calabrese, Lyman A. Page, Jo Dunkley, Daniel T. Becker, Leila R. Vale, Thibaut Louis, Edward J. Wollack, Simone Aiola, Michael D. Niemack, Laboratoire de Physique des 2 Infinis Irène Joliot-Curie (IJCLab), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Université Paris-Saclay-Centre National de la Recherche Scientifique (CNRS), ACT, Namikawa, Toshiya [0000-0003-3070-9240], Apollo - University of Cambridge Repository, Madhavacheril, M, Sifon, C, Battaglia, N, Aiola, S, Amodeo, S, Austermann, J, Beall, J, Becker, D, Richard Bond, J, Calabrese, E, Choi, S, Denison, E, Devlin, M, Dicker, S, Duff, S, Duivenvoorden, A, Dunkley, J, Dunner, R, Ferraro, S, Gallardo, P, Guan, Y, Han, D, Colin Hill, J, Hilton, G, Hilton, M, Hubmayr, J, Huffenberger, K, Hughes, J, Koopman, B, Kosowsky, A, van Lanen, J, Lee, E, Louis, T, Macinnis, A, Mcmahon, J, Moodley, K, Naess, S, Namikawa, T, Nati, F, Newburgh, L, Niemack, M, Page, L, Partridge, B, Qu, F, Robertson, N, Salatino, M, Schaan, E, Schillaci, A, Schmitt, B, Sehgal, N, Sherwin, B, Simon, S, Spergel, D, Staggs, S, Storer, E, Ullom, J, Vale, L, van Engelen, A, Vavagiakis, E, Wollack, E, and Xu, Z

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), 010504 meteorology & atmospheric sciences, astro-ph.GA, Cosmic microwave background, Population, Gravitational lensing, FOS: Physical sciences, Astrophysics, Astrophysics::Cosmology and Extragalactic Astrophysics, Astronomy & Astrophysics, High-redshift galaxy clusters, 01 natural sciences, Cosmology, Cosmic microwave background radiation, 0103 physical sciences, education, 010303 astronomy & astrophysics, Galaxy cluster, Weak gravitational lensing, Astrophysics::Galaxy Astrophysics, 0105 earth and related environmental sciences, Physics, education.field_of_study, Astronomy and Astrophysics, Astrophysics - Astrophysics of Galaxies, Redshift, gravitational lensing, cosmic microwave background, Gravitational lens, Space and Planetary Science, Astrophysics of Galaxies (astro-ph.GA), Atacama Cosmology Telescope, astro-ph.CO, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astronomical and Space Sciences, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We use gravitational lensing of the cosmic microwave background (CMB) to measure the mass of the most distant blindly-selected sample of galaxy clusters on which a lensing measurement has been performed to date. In CMB data from the the Atacama Cosmology Telescope (ACT) and the Planck satellite, we detect the stacked lensing effect from 677 near-infrared-selected galaxy clusters from the Massive and Distant Clusters of WISE Survey (MaDCoWS), which have a mean redshift of $ \langle z \rangle = 1.08$. There are no current optical weak lensing measurements of clusters that match the distance and average mass of this sample. We detect the lensing signal with a significance of $4.2 \sigma$. We model the signal with a halo model framework to find the mean mass of the population from which these clusters are drawn. Assuming that the clusters follow Navarro-Frenk-White density profiles, we infer a mean mass of $\langle M_{500c}\rangle = \left(1.7 \pm 0.4 \right)\times10^{14}\,\mathrm{M}_\odot$. We consider systematic uncertainties from cluster redshift errors, centering errors, and the shape of the NFW profile. These are all smaller than 30% of our reported uncertainty. This work highlights the potential of CMB lensing to enable cosmological constraints from the abundance of distant clusters populating ever larger volumes of the observable Universe, beyond the capabilities of optical weak lensing measurements., Comment: 14 pages, 3 figures, matches version accepted in ApJL, code available at https://github.com/ACTCollaboration/madcows_lensing/

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