Mapping gas around massive galaxies: cross-correlation of DES Y3 galaxies and Compton-y maps from SPT and Planck

• Published in: Monthly Notices of the Royal Astronomical Society
• Main Authors: Sánchez, J, Omori, Y, Chang, C, Bleem, L E, Crawford, T, Drlica-Wagner, A, Raghunathan, S, Zacharegkas, G, Abbott, T M C, Aguena, M, Alarcon, A, Allam, S, Alves, O, Amon, A, Avila, S, Baxter, E, Bechtol, K, Benson, B A, Bernstein, G M, Bertin, E, Bocquet, S, Brooks, D, Burke, D L, Campos, A, Carlstrom, J E, Rosell, A Carnero, Kind, M Carrasco, Carretero, J, Castander, F J, Cawthon, R, Chang, C L, Chen, A, Choi, A, Chown, R, Costanzi, M, Crites, A T, Crocce, M, da Costa, L N, Pereira, M E S, de Haan, T, De Vicente, J, DeRose, J, Desai, S, Diehl, H T, Dobbs, M A, Dodelson, S, Doel, P, Elvin-Poole, J, Everett, W, Everett, S
• Other Authors: DOE, National Science Foundation, Australian Research Council, Natural Sciences and Engineering Research Council of Canada, Deutsche Forschungsgemeinschaft, MICINN, European Research Council, CNPq, National Energy Research Scientific Computing Center
• Format: Article in Journal/Newspaper
• Language: English
• Published: Oxford University Press (OUP) 2023
• Subjects: South Pole; South pole
• Online Access: http://dx.doi.org/10.1093/mnras/stad1167; https://academic.oup.com/mnras/advance-article-pdf/doi/10.1093/mnras/stad1167/50051963/stad1167.pdf; https://academic.oup.com/mnras/article-pdf/522/2/3163/50171277/stad1167.pdf

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 〈bhPe 〉, using large-scale information. We find 〈bhPe 〉 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.