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Published March 15, 2021 | Version Accepted Version + Published
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Atacama Cosmology Telescope: Modeling the gas thermodynamics in BOSS CMASS galaxies from kinematic and thermal Sunyaev-Zel'dovich measurements

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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 (constant stellar mass) galaxies in the Baryon Oscillation Spectroscopic Survey using new measurements of the kSZ and tSZ signals obtained in a companion paper [Schaan et al.]. Combining kSZ and tSZ measurements, we measure within our model the amplitude of energy injection εM⋆c², where M⋆ is the stellar mass, to be ε = (40±9)×10⁻⁶, and the amplitude of the nonthermal pressure profile to be α_(Nth) < 0.2(2σ), indicating that less than 20% of the total pressure within the virial radius is due to a nonthermal component. We estimate the effects of including baryons in the modeling of weak-lensing galaxy cross-correlation measurements using the best-fit density profile from the kSZ measurement. Our estimate reduces the difference between the original theoretical model and the weak-lensing galaxy cross-correlation measurements in [A. Leauthaud et al., Mon. Not. R. Astron. Soc. 467, 3024 (2017)] by half (50% at most), but does not fully reconcile it. Comparing the kSZ and tSZ measurements to cosmological simulations, we find that they underpredict the CGM pressure and to a lesser extent the CGM density at larger radii with probabilities to exceed ranging from 0.00 to 0.03 and 0.12 to 0.14, for tSZ and kSZ, respectively. This suggests that the energy injected via feedback models in the simulations that we compared against does not sufficiently heat the gas at these radii. We do not find significant disagreement at smaller radii. These measurements provide novel tests of current and future simulations. This work demonstrates the power of joint, high signal-to-noise kSZ and tSZ observations, upon which future cross-correlation studies will improve.

Additional Information

© 2021 American Physical Society. Received 13 September 2020; accepted 2 February 2021; published 15 March 2021. The authors thank the anonymous referee for their helpful and constructive comments which improved the paper. This work was supported by the U.S. National Science Foundation through Grants No. AST-1440226, No. AST0965625, and No. AST-0408698 for the ACT project, as well as Grants No. PHY-1214379 and No. PHY-0855887. Funding was also provided by Princeton University, the University of Pennsylvania, and a Canada Foundation for Innovation (CFI) award to UBC. ACT operates in the Parque Astronómico Atacama in northern Chile under the auspices of the Comisión Nacional de Investigación Científica y Tecnológica de Chile (CONICYT). The Flatiron Institute is funded by the Simons Foundation. N. B. acknowledges support from NSF Grant No. AST-1910021. N. B. and J. C. H. acknowledge support from the Research and Technology Development fund at the Jet Propulsion Laboratory through the project entitled "Mapping the Baryonic Majority". E. S. is supported by the Chamberlain fellowship at Lawrence Berkeley National Laboratory. S. F. is supported by the Physics Division of Lawrence Berkeley National Laboratory. E. C. acknowledges support from the STFC Ernest Rutherford Fellowship ST/M004856/2 and STFC Consolidated Grant No. ST/S00033X/1, and from the Horizon 2020 ERC Starting Grant (Grant agreement No. 849169). R. D. thanks CONICYT for Grant No. BASAL CATA AFB-170002. D. H., A. M., and N. S. acknowledge support from NSF Grants No. AST-1513618 and No. AST-1907657. M. H. acknowledges support from the National Research Foundation of South Africa. J. P. H. acknowledges funding for SZ cluster studies from NSF AAG No. AST-1615657. K. M. acknowledges support from the National Research Foundation of South Africa. C. S. acknowledges support from the Agencia Nacional de Investigación y Desarrollo (ANID) through FONDECYT Iniciación Grant No. 11191125.

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Published - PhysRevD.103.063514.pdf

Accepted Version - 2009.05558.pdf

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Additional details

Additional titles

Alternative title
The Atacama Cosmology Telescope: Modelling the Gas Thermodynamics in BOSS CMASS galaxies from Kinematic and Thermal Sunyaev-Zel'dovich Measurements

Identifiers

Eprint ID
108800
Resolver ID
CaltechAUTHORS:20210422-083854415

Related works

Describes
https://arxiv.org/abs/2009.05558 (URL)

Funding

NSF
AST-1440226
NSF
AST-0965625
NSF
AST-0408698
NSF
PHY-1214379
NSF
PHY-0855887
Princeton University
University of Pennsylvania
Canada Foundation for Innovation
Comisión Nacional de Investigación Científica y Tecnológica (CONICYT)
Simons Foundation
NSF
AST-1910021
JPL Research and Technology Development Fund
Lawrence Berkeley National Laboratory
Science and Technology Facilities Council (STFC)
ST/M004856/2
Science and Technology Facilities Council (STFC)
ST/S00033X/1
European Research Council (ERC)
849169
BASAL-CATA
AFB-170002
NSF
AST-1513618
NSF
AST-1907657
National Research Foundation (South Africa)
NSF
AST-1615657
Agencia Nacional de Investigación y Desarrollo (ANID)
Fondo Nacional de Desarrollo Científico y Tecnológico (FONDECYT)
11191125

Dates

Created
2021-04-22
Created from EPrint's datestamp field
Updated
2021-04-22
Created from EPrint's last_modified field