Halo gas thermodynamics from the CMB: results from the Atacama Cosmology Telescope DR5

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• Stefania Amodeo (Cornell University)
• Monday 01 February 2021, 15:00-16:00
• CMS, Pav. B, CTC Common Room (B1.19) [Potter Room].

If you have a question about this talk, please contact Sunny Vagnozzi.

The thermodynamic properties of the ionized baryons in galaxies, groups, and clusters encode the effects of the assembly history and feedback processes that shape galaxy and cluster formation. These properties can be studied through the thermal and kinematic Sunyaev-Zel’dovich (SZ) effects imprinted on high resolution maps of the cosmic microwave background. Using new SZ results from the Atacama Cosmology Telescope DR5 and Planck in combination with the CMASS galaxy catalogs from the Baryon Oscillation Spectroscopic Survey, we achieve high signal-to-noise measurements of the electron density, temperature and pressure distribution around the CMASS galaxies that we use to constrain the energy injected via feedback and the non-thermal pressure support, we estimate the effect of including baryons in the modeling of galaxy-galaxy lensing measurements, and we find interesting tensions with cosmological simulations.

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