Abstract
We cross-correlate positions of galaxies measured in data from the first three years of the Dark Energy Survey with Compton-y maps generated using data from the South Pole Telescope (SPT) and the Planck mission. We model this cross-correlation measurement together with the galaxy autocorrelation to constrain the distribution of gas in the Universe. We measure the hydrostatic mass bias or, equivalently, the mean halo bias-weighted electron pressure <bh Pe>, using large-scale information. We find <bh Pe> to be [0.16+0.03-0.04, 0.28+0.04-0.05, 0.45+0.06-0.10, 0.54+0.08-0.07, 0.61+0.08-0.06, 0.63+0.07-0.08] meV cm−3 at redshifts z ∼ [0.30, 0.46, 0.62, 0.77, 0.89, 0.97]. These values are consistent with previous work where measurements exist in the redshift range. We also constrain the mean gas profile using small-scale information, enabled by the high-resolution of the SPT data. We compare our measurements to different parametrized profiles based on the cosmo-OWLS hydrodynamical simulations. We find that our data are consistent with the simulation that assumes an AGN heating temperature of 108.5 K but are incompatible with the model that assumes an AGN heating temperature of 108.0 K. These comparisons indicate that the data prefer a higher value of electron pressure than the simulations within r500c of the galaxies’ haloes.
Original language | English |
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Pages (from-to) | 3163-3182 |
Number of pages | 20 |
Journal | Monthly Notices of the Royal Astronomical Society |
Volume | 522 |
Issue number | 2 |
DOIs | |
Publication status | Published - Jun 2023 |
Keywords
- galaxies: structure
- large-scale structure of Universe
- cosmology: observations