Speaker
Description
We analyze measurements of the thermal Sunyaev-Zeldovich (tSZ) effect arising in the circumgalactic medium (CGM) of L galaxies. In our analysis we use the Faerman et al. 2017 and Faerman et al. 2020 CGM models, a new power-law model (PLM), and the TNG100 simulation.
An observation by Bregman et al. 2022 Compton-y profile implies steep electron pressure slopes. Considering the possibility of a hydrostatic equilibrium, we find that the B+22 galaxies favor an isentropic equation of state over an isothermal one. The B+22 results are consistent with a similar work by Das et al. 2022, and with recent (0.5-2 keV) CGM X-ray observations by Zhang et al. 2024 of Milky Way mass systems.
TNG100 underpredicts the tSZ parameters by relatively 0.5 dex for the L galaxies, suggesting that the feedback strengths and CGM gas losses are overestimated in the simulated halos at these mass scales.
| Would you be interested in presenting a poster if the conference is oversubcribed? | No |
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