Measurements of the thermal Sunyaev-Zel’dovich effect with ACT and DESI luminous red galaxies
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- University of California, Berkeley, CA (United States); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States); University of California, Berkeley, CA (United States)
- SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- Boston University, MA (United States)
- Cornell University, Ithaca, NY (United States); Université Paris Cité, Paris (France)
- Università degli Studi di Milano (Italy)
- University College London (United Kingdom)
- Durham University (United Kingdom)
- Kavli Institute for Cosmology Cambridge (United Kingdom); University of Cambridge (United Kingdom)
- Universidad Nacional Autónoma de México (Mexico)
- NSF NOIRLab, Tucson, AZ (United States)
- Stanford University, CA (United States); University of California, Berkeley, CA (United States)
- Universidad de los Andes, Bogotá (Colombia)
- Institut d’Estudis Espacials de Catalunya (IEEC), Castelldefels (Spain); University of Portsmouth (United Kingdom); Institute of Space Sciences, Barcelona (Spain)
- Cornell University, Ithaca, NY (United States)
- Excellence Cluster ORIGINS, Garching (Germany); Ludwig-Maximilians-Universität, München (Germany)
- Fermi National Accelerator Laboratory (FNAL), Batavia, IL (United States)
- The Ohio State University, Columbus, OH (United States); University of California, Berkeley, CA (United States)
- University of Queensland (Australia)
- Southern Methodist University, Dallas, TX (United States)
- Sorbonne Université, Paris (France)
- The Barcelona Institute of Science and Technology, Bellaterra (Barcelona) (Spain)
- Universitat Autònoma de Barcelona, Bellaterra (Barcelona) (Spain); The Barcelona Institute of Science and Technology, Bellaterra (Barcelona) (Spain)
- The Ohio State University, Columbus, OH (United States)
- Institució Catalana de Recerca i Estudis Avançats, Barcelona (Spain); The Barcelona Institute of Science and Technology, Bellaterra (Barcelona) (Spain)
- University of KwaZulu-Natal, Durban (South Africa)
- University of Pittsburgh, PA (United States)
- Universidad de Guanajuato (Mexico); Instituto Avanzado de Cosmología A. C. (Mexico)
- Université Paris-Saclay, Gif-sur-Yvette (France); Lawrence Berkeley National Laboratory (LBNL), Berkeley, CA (United States)
- University of Waterloo, ON (Canada); Perimeter Institute for Theoretical Physics, Waterloo, ON (Canada)
- Instituto de Astrofísica de Andalucía (CSIC), Granada (Spain)
- Universitat Politècnica de Catalunya, Barcelona (Spain)
- Stanford University, CA (United States); SLAC National Accelerator Laboratory (SLAC), Menlo Park, CA (United States)
- Sejong University, Seoul (Korea, Republic of)
- CIEMAT, Madrid (Spain)
- University of Michigan, Ann Arbor, MI (United States)
- Ohio University, Athens, OH (United States)
- Pontificia Universidad Católica de Valparaíso (Chile)
- Duke University, Durham, NC (United States); Cornell University, Ithaca, NY (United States)
- NASA Goddard Spaceflight Center, Greenbelt, MD (United States)
- Chinese Academy of Sciences, Beijing (China)
Cosmic Microwave Background (CMB) photons scatter off the free-electron gas in galaxies and clusters, allowing us to use the CMB as a backlight to probe the gas in and around low-redshift galaxies. The thermal Sunyaev-Zel’dovich effect, sourced by hot electrons in high-density environments, measures the thermal pressure of the target objects, shedding light on halo thermodynamics and galaxy formation, and providing a path toward understanding the baryon distribution around cosmic structures. We use a combination of high-resolution CMB maps from the Atacama Cosmology Telescope and photometric luminous red galaxy catalogs from the Dark Energy Spectroscopic Instrument to measure the thermal Sunyaev-Zel’dovich signal in four redshift bins from 𝑧 = 0.4 to 𝑧 = 1.2, with a combined detection significance of 19𝜎 when stacking on the fiducial CMB Compton-𝑦 map. We discuss possible sources of contamination, finding that residual dust emission associated with the target galaxies is important and limits current analyses. We discuss several mitigation strategies and quantify the residual modeling uncertainty. Furthermore, this work complements closely related measurements of the kinematic Sunyaev-Zel’dovich and weak lensing of the same galaxies.
- Research Organization:
- University of Michigan, Ann Arbor, MI (United States)
- Sponsoring Organization:
- National Aeronautics and Space Administration (NASA); U.S. National Science Foundation (NSF), Division of Astronomical Sciences; USDOE Office of Science (SC), High Energy Physics (HEP)
- Grant/Contract Number:
- AC02-05CH11231; AC02-76SF00515; SC0019193
- OSTI ID:
- 3007032
- Journal Information:
- Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 8 Vol. 112; ISSN 2470-0010; ISSN 2470-0029
- Publisher:
- American Physical Society (APS)Copyright Statement
- Country of Publication:
- United States
- Language:
- English
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