Deciphering baryonic feedback with galaxy clusters

Upcoming cosmic shear analyses will precisely measure the cosmic matter distribution at low redshifts. At these redshifts, the matter distribution is affected by galaxy formation physics, primarily baryonic feedback from star formation and active galactic nuclei. Employing measurements from the Magn...

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Bibliographic Details
Published in:Journal of cosmology and astroparticle physics 2024-07, Vol.2024 (7), p.37
Main Authors: To, Chun-Hao, Pandey, Shivam, Krause, Elisabeth, Dalal, Nihar, Anbajagane, Dhayaa, Weinberg, David H.
Format: Article
Language:English
Subjects:
Active galactic nuclei
Baryons
Cluster analysis
Cosmic microwave background
Dark matter
Feedback
Galactic clusters
Galactic evolution
galaxy clusters
Galaxy distribution
Gravitational lenses
gravitational lensing
Shear
Star & galaxy formation
Star formation
Sunyaev-Zeldovich effect
Systematic errors
weak gravitational lensing
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Summary:Upcoming cosmic shear analyses will precisely measure the cosmic matter distribution at low redshifts. At these redshifts, the matter distribution is affected by galaxy formation physics, primarily baryonic feedback from star formation and active galactic nuclei. Employing measurements from the Magneticum and IllustrisTNG simulations and a dark matter + baryon (DMB) halo model, this paper demonstrates that Sunyaev-Zel'dovich (SZ) effect observations of galaxy clusters, whose masses have been calibrated using weak gravitational lensing, can constrain the baryonic impact on cosmic shear with statistical and systematic errors subdominant to the measurement errors of DES-Y3 and LSST-Y1, with systematic errors on S 8 and Ω m reaching 10% and 50% of the statistical errors, respectively. For LSST-Y6 and Roman surveys, these systematic errors increase to 150% and 100% of the statistical errors, indicating the necessity for further model developments for future surveys. We further dissect the contributions from different scales and halos with different masses to cosmic shear, highlighting the dominant role of SZ clusters at scales critical for cosmic shear analyses. These findings suggest a promising avenue for future joint analyses of Cosmic Microwave Background (CMB) and lensing surveys.
ISSN:1475-7516
1475-7516
DOI:10.1088/1475-7516/2024/07/037