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6 results on '"Diehl, H. Thomas"'

1. Dark Energy Survey Year 1 Results: Constraining Baryonic Physics in the Universe

Author

Samuel Hinton, Elisabeth Krause, G. Gutierrez, Matthew R. Becker, Jochen Weller, David James, Matias Carrasco Kind, Marcelle Soares-Santos, E. Rozo, Timothy M. C. Abbott, Rachel Mandelbaum, James Annis, Aurelio Carnero Rosell, Ramon Miquel, Molly E. C. Swanson, D. L. Burke, Dragan Huterer, Hung Jin Huang, Robert A. Gruendl, Pablo Fosalba, E. J. Sanchez, Gary Bernstein, Andrés Plazas Malagón, Ofer Lahav, A. Roodman, Jennifer L. Marshall, C. Sánchez, Will Hartley, Judit Prat, Emmanuel Bertin, K. Romer, Francisco J. Castander, Mathew Smith, Michel Aguena, Santiago Serrano, B. Flaugher, Xiao Fang, I. Sevilla, Marcio A. G. Maia, V. Scarpine, Vivian Miranda, M. Gatti, Josh Frieman, Juan de Vicente, Jack Elvin-Poole, Peter Doel, Mike Jarvis, David J. Brooks, Enrique Gaztanaga, Tim Eifler, Anqi Chen, Luiz N. da Costa, F. Paz-Chinchón, Niall MacCrann, Diehl H. Thomas, Daniel Gruen, Simon Samuroff, J. DeRose, E. Suchyta, Ami Choi, Ben Hoyle, J. Carretero, J. P. Dietrich, Juan Garcia-Bellido, Oliver Friedrich, K. Honscheid, Felipe Menanteau, Gregory Tarle, S. Everett, Sukhdeep Singh, Markus Rau, Michael Troxel, Marcos Lima, Kyler Kuehn, Sarah Bridle, Santiago Avila, Joe Zuntz, 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), DES, UAM. Departamento de Física Teórica, and National Aeronautics and Space Administration (US)

Subjects
Particle physics, Large-Scale Structure of Universe, Cosmology and Nongalactic Astrophysics (astro-ph.CO), Cosmic microwave background, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, 7. Clean energy, 01 natural sciences, Cosmology, symbols.namesake, cosmology: theory, 0103 physical sciences, Planck, cosmological parameters, 010303 astronomy & astrophysics, Weak gravitational lensing, Physics, 010308 nuclear & particles physics, Física, Astronomy and Astrophysics, Galaxy, Baryon, 13. Climate action, Space and Planetary Science, symbols, Dark energy, Theory [Cosmology], Cosmological Parameters, Baryon acoustic oscillations, large-scale structure of Universe, [PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph], Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

Measurements of large-scale structure are interpreted using theoretical predictions for the matter distribution, including potential impacts of baryonic physics. We constrain the feedback strength of baryons jointly with cosmology using weak lensing and galaxy clustering observables (3$\times$2pt) of Dark Energy Survey (DES) Year 1 data in combination with external information from baryon acoustic oscillations (BAO) and Planck cosmic microwave background polarization. Our baryon modeling is informed by a set of hydrodynamical simulations that span a variety of baryon scenarios; we span this space via a Principal Component (PC) analysis of the summary statistics extracted from these simulations. We show that at the level of DES Y1 constraining power, one PC is sufficient to describe the variation of baryonic effects in the observables, and the first PC amplitude ($Q_1$) generally reflects the strength of baryon feedback. With the upper limit of $Q_1$ prior being bound by the Illustris feedback scenarios, we reach $\sim 20\%$ improvement in the constraint of $S_8=\sigma_8(\Omega_{\rm m}/0.3)^{0.5}=0.788^{+0.018}_{-0.021}$ compared to the original DES 3$\times$2pt analysis. This gain is driven by the inclusion of small-scale cosmic shear information down to 2.5 arcmin, which was excluded in previous DES analyses that did not model baryonic physics. We obtain $S_8=0.781^{+0.014}_{-0.015}$ for the combined DES Y1+Planck EE+BAO analysis with a non-informative $Q_1$ prior. In terms of the baryon constraints, we measure $Q_1=1.14^{+2.20}_{-2.80}$ for DES Y1 only and $Q_1=1.42^{+1.63}_{-1.48}$ for DESY1+Planck EE+BAO, allowing us to exclude one of the most extreme AGN feedback hydrodynamical scenario at more than $2 \sigma$., Comment: 22 pages, 18 figures, 2 tables. accepted to MNRAS. A brief video summary of this paper is available at https://www.youtube.com/watch?v=QbeNwk5papU

Published
2020
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2. Dark Energy Survey's Observation Strategy, Tactics, and Exposure Scheduler

Author

Neilsen Jr., Eric H., Annis, James T., Diehl, H. Thomas, Swanson, Molly E. C., D'Andrea, Chris, Kent, Stephen, and Drlica-Wagner, Alex

Subjects
FOS: Physical sciences, Astrophysics - Instrumentation and Methods for Astrophysics, Instrumentation and Methods for Astrophysics (astro-ph.IM)
Abstract

The Dark Energy Survey is a stage III dark energy experiment, performing an optical imaging survey to measure cosmological equation of state parameters using four independent methods. The scope and complexity of the survey introduced complex strategic and tactical scheduling problems that needed to be addressed. We begin with an overview of the process used to develop DES strategy and tactics, from the inception of the project, to task forces that studied and developed strategy changes over the course of the survey, to the nightly pre-observing meeting in which immediate tactical issues were addressed. We then summarize the strategic choices made for each sub-survey, including metrics, scheduling considerations, choice of time domain fields and their sequences of exposures, and wide survey footprint and pointing layout choices. We go on to describe the detailed process that determined which specific exposures were taken at which specific times. We give a chronology of the strategic and tactical peculiarities of each year of observing, including the proposal and execution of a sixth year. We give an overview of obstac, the implementation of the DES scheduler used to simulate and evaluate strategic and tactical options, and automate exposure scheduling; and describe developments in obstac for use after DES. Appendices describe further details of data quality evaluation, tau, and t_eff; airmass calculation; and modeling of the seeing and sky brightness. The significant corpus of DES data indicates that the simple scaling relations for seeing as a function of wavelength and airmass derived from the Kolmogorov turbulence model work adequately for exposure planning purposes: deviations from these relations are modest in comparison with short time-scale seeing variations., Comment: 79 pages, 43 figures

Published
2019
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3. The Sloan Bright Arcs Survey: Four Strongly Lensed Galaxies with Redshift >2

Author

Diehl, H. Thomas, Allam, Sahar S., Annis, James, Buckley-Geer, Elizabeth J., Frieman, Joshua A., Kubik, Donna, Kubo, Jeffrey M., Lin, Huan, Tucker, Douglas, and West, Anderson

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics::Instrumentation and Methods for Astrophysics, FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics::Galaxy Astrophysics
Abstract

We report the discovery of four very bright, strongly-lensed galaxies found via systematic searches for arcs in Sloan Digital Sky Survey Data Release 5 and 6. These were followed-up with spectroscopy and imaging data from the Astrophysical Research Consortium 3.5m telescope at Apache Point Observatory and found to have redshift $z>2.0$. With isophotal magnitudes $r = 19.2 - 20.4$ and $3\arcsec$-diameter magnitudes $r = 20.0 - 20.6$, these systems are some of the brightest and highest surface brightness lensed galaxies known in this redshift range. In addition to the magnitudes and redshifts, we present estimates of the Einstein radii, which range from $5.0 \arcsec$ to $12.7 \arcsec$, and use those to derive the enclosed masses of the lensing galaxies.

Published
2009
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4. The dark energy survey

Author

Abbott, T., Aldering, G., Annis, J., Barlow, M., Bebek, C., Bigelow, B., Beldica, C., Bernstein, R., Bridle, S., Brunner, R., Carlstrom, J., Campbell, M., Castander, F., Cunha, Carlos E., Diehl, H. Thomas, Dodelson, Scott, Doel, P., Efstathiou, G., Estrada, J., Evrard, A., Fernandez, E., Flaugher, B., Fosalba, Pablo, Frieman, Joshua A., Gaztanaga, Enrique, Gerdes, David W., Gladders, M., Holland, S., Hu, W., Huterer, Dragan, Jain, B., Karliner, Inga, Kent, S., Lahav, O., Levi, Michael Edward, Lima, M., Lin, H., Limon, P., Martinez, M., Mckay, T., Mcmahon, J., Merritt, K. Wyatt, Miller, C., Miralda-Escude, J., Mohr, J., Nichol, R., Oyaizu, H., Peacock, J., Peoples, John, Perlmutter, Saul, Plante, R., Ricker, Paul M., Roe, Natalie A., Scarpine, V., Schubnell, M., Selen, Mats, Sheldon, E., Smith, C., Stebbins, Albert, Stoughton, C., Suntzeff, N., Sutherland, W., Takada, M., Tarle, G., Tecchio, M., Thaler, Jon J., Tucker, Douglas L., Viti, S., Walker, A., Wechsler, Risa H., Weller, Jochen, and William Wester

5. Core or cusps: The central dark matter profile of a redshift one strong lensing cluster with a bright central image

Author

Collett, Thomas E., Buckley-Geer, Elizabeth, Lin, Huan, Bacon, David, Nichol, Robert C., Nord, Brian, Morice-Atkinson, Xan, Amara, Adam, Birrer, Simon, Kuropatkin, Nikolay, More, Anupreeta, Papovich, Casey, Romer, Kathy K., Tessore, Nicolas, Abbott, Tim M. C., Allam, Sahar, Annis, James, Benoit-Lévy, Aurélien, Brooks, David, Burke, David L., Matias Carrasco Kind, Castander, Francisco Javier J., D Andrea, Chris B., Da Costa, Luiz N., Desai, Shantanu, Diehl, H. Thomas, Doel, Peter, Eifler, Tim F., Flaugher, Brenna, Frieman, Josh, Gerdes, David W., Goldstein, Daniel A., Gruen, Daniel, Gschwend, Julia, Gutierrez, Gaston, James, David J., Kuehn, Kyler, Kuhlmann, Steve, Lahav, Ofer, Li, Ting S., Lima, Marcos, Maia, Marcio A. G., March, Marisa, Marshall, Jennifer L., Martini, Paul, Melchior, Peter, Miquel, Ramon, Plazas, Andrés A., Rykoff, Eli S., Sanchez, Eusebio, Scarpine, Vic, Schindler, Rafe, Schubnell, Michael, Sevilla-Noarbe, Ignacio, Smith, Mathew, Sobreira, Flavia, Suchyta, Eric, Swanson, Molly E. C., Tarle, Gregory, Tucker, Douglas L., and Walker, Alistair R.

Subjects
Cosmology and Nongalactic Astrophysics (astro-ph.CO), Astrophysics of Galaxies (astro-ph.GA), FOS: Physical sciences, Astrophysics::Cosmology and Extragalactic Astrophysics, Astrophysics - Astrophysics of Galaxies, Astrophysics::Galaxy Astrophysics, Astrophysics - Cosmology and Nongalactic Astrophysics
Abstract

We report on SPT-CLJ2011-5228, a giant system of arcs created by a cluster at $z=1.06$. The arc system is notable for the presence of a bright central image. The source is a Lyman Break galaxy at $z_s=2.39$ and the mass enclosed within the 14 arc second radius Einstein ring is $10^{14.2}$ solar masses. We perform a full light profile reconstruction of the lensed images to precisely infer the parameters of the mass distribution. The brightness of the central image demands that the central total density profile of the lens be shallow. By fitting the dark matter as a generalized Navarro-Frenk-White profile---with a free parameter for the inner density slope---we find that the break radius is $270^{+48}_{-76}$ kpc, and that the inner density falls with radius to the power $-0.38\pm0.04$ at 68 percent confidence. Such a shallow profile is in strong tension with our understanding of relaxed cold dark matter halos; dark matter only simulations predict the inner density should fall as $r^{-1}$. The tension can be alleviated if this cluster is in fact a merger; a two halo model can also reconstruct the data, with both clumps (density going as $r^{-0.8}$ and $r^{-1.0}$) much more consistent with predictions from dark matter only simulations. At the resolution of our Dark Energy Survey imaging, we are unable to choose between these two models, but we make predictions for forthcoming Hubble Space Telescope imaging that will decisively distinguish between them., 13 Pages. Accepted for publication in ApJ

6. Feasibility Study 2 of A Muon Based Neutrino Source

Author

Ozaki, S., Palmer, R. B., Zisman, M. S., Gallardo, J. C., Goodman, Maury, Hassanein, Ahmed, Norem, James H., Reed, Claude B., Smith, Dale, Teng, Lee C., Wang, Chun-Xi, Anerella, Michael, Berg, J. Scott, Brennan, Joseph M., Fernow, Richard C., Gupta, Ramesh, Harrison, Michael, Hemmer, Michael, Hseuh, Hsiao-C, Iarocci, Michael A., Kahn, Stephen A., King, Bruce J., Kirk, Harold G., Lissauer, David, Littenberg, Laurence S., Luccio, Alfredo, Ludewig, Hans, Marneris, Ioannis M., Mills, James, Morse, William A., Musolino, Stephen V., O Brien, Edward, Oh, Wonho, Parker, Brett, Parsa, Zohreh, Pearson, Charles, Prigl, Ralf, Rehak, Pavel, Roser, Thomas, Ruggiero, Allessandro, Samulyak, Roman, Schmalzle, Jesse D., Simos, Nick, Stumer, Iuliu, Sullivan, Mariola, Tcherniatine, Valeri, Thieberger, Peter, Trbojevic, Dejan, Weggel, Robert, Willen, Erich H., Zhang, Shuo-Yuan, Zhao, Yongxiang, Silvestrov, Gregory I., Skrinsky, Alexander N., Vsevolozhskaya, Tatiana A., Penn, Gregory, Wurtele, Jonathan S., Gunion, John F., Cline, David B., Fukui, Yasuo, Garren, Alper A., Lee, Kevin, Pischalnikov, Yuriy, Autin, Bruno, Garoby, Roland, Haseroth, Helmut, Johnson, Colin, Ravn, Helge, Wilson, Edmund J. N., Hoffman, Kara Dion, Kim, Kwang-Je, Oreglia, Mark, Wah, Yau, Wu, Vincent, Caldwell, Allen C., Conrad, Janet M., Monroe, Jocelyn, Sciulli, Frank, Shaevitz, Michael H., Willis, William J., Geng, Rongli, Padamsee, Hasan, Shemelin, Valery, Tigner, Maury, Hwang, Peter, Naumovich, Gregory, Winn, David R., Ankenbrandt, Charles M., Atac, Muzaffer, Balbekov, Valeri I., Buckley-Geer, Elizabeth J., Carey, David C., Childress, Samuel R., Chou, Weiren, Dejongh, Fritz, Diehl, H. Thomas, Drozhdin, Alexander, Elvira, Daniel, Finley, David A., Geer, Stephen H., Gounder, Krishnaswamy, Johnstone, Carol, Lebrun, Paul, Lebedev, Valeri, Lykken, Joseph D., Mills, Frederick E., Mokhov, Nikolai V., Moretti, Alfred, Neuffer, David V., Ng, King-Yuen, Popovic, Milorad, Qian, Zubao, Raja, Rajendran, Reid, John S., Spentzouris, Panagiotis, Stefanski, Raymond J., Striganov, Sergei, Tollestrup, Alvin, Ginneken, Andreas, Vejcik, Steve, Blondel, Alain, Learned, John G., Pakvasa, Sandip, Ferrario, Massimo, Bogacz, S. Alex, Chattopadhyay, Swapan, Wang, Haipeng, Bolton, T., Kuno, Yoshitaka, Mori, Yoshiharu, Yokoi, Takeichiro, Black, Edgar L., Johnson, Rolland, Kaplan, Daniel M., Solomey, Nickolas, Torun, Yagmur, Errede, Deborah, Makino, Kyoko, Berger, Michael S., Hanson, Gail G., Schwandt, Peter, Ginzburg, Ilya F., Onel, Yasar, Caspi, Shlomo, Corlett, John, Furman, Miguel A., Green, Michael A., Hartman, Neal, Ladran, Anthony S., Li, Derun, Macgill, Robert A., Mcinturff, Alfred D., Reginato, Louis L., Rimmer, Robert, Scanlan, Roland M., Sessler, Andrew M., Shadwick, Brad, Turner, William C., Vanecek, David, Yu, Simon, Zolotorev, Max, Minervini, Joe, Schultz, Joel, Berz, Martin, Erdelyi, Bela, York, Richard, Zeller, Al, Bracker, Stephen B., Cremaldi, Lucien, Summers, Donald Joseph, Miller, John R., Prestemon, Soren, Gerald Charles Blazey, Cummings, Mary Anne, Hedin, David, Schellman, Heidi M., Chesser, J. B., Conner, David L., Gabriel, Tony A., Gallmeier, F. X., Haines, John R., Holtkamp, Norbert, Mcmanamy, T. J., Spampinato, Philip T., Kim, Eun-San, Yoon, Moohyun, Lu, Changguo, Mcdonald, Kirk T., Prebys, Eric J., Rossmanith, Robert, Bennett, J. Roger J., Titus, Peter, Shrock, Robert, Benary, Odette, Barger, Vernon D., and Han, Tao

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