%0 Generic %1 koukoufilippas2019tomographic %A Koukoufilippas, Nick %A Alonso, David %A Bilicki, Maciej %A Peacock, John A. %D 2019 %K library %T Tomographic measurement of the intergalactic gas pressure through galaxy-tSZ cross-correlations %U http://arxiv.org/abs/1909.09102 %X We cross-correlate maps of the thermal Sunyaev-Zeldovich (tSZ) Compton-$y$ parameter published by Planck with the projected distribution of galaxies in a set of low-redshift tomographic bins. We use the nearly full-sky 2MASS Photometric Redshift and WISE $\times$ SuperCOSMOS public catalogues, covering the redshift range $złesssim0.4$. Our measurements allow us to place constraints on the redshift dependence of the mass-observable relation for tSZ cluster count analyses in terms of the so-called 'hydrostatic mass bias' parameter $1-b_H$. These results can also be interpreted as measurements of the bias-weighted average gas pressure $bP_e\rangle$ as a function of redshift, a quantity that can be related to the thermodynamics of gas inside haloes and used to constrain energy injection processes. We measure $1-b_\rm H$ with $\sim13\%$ precision in 6 equispaced redshift bins, and find no evidence for a redshift-dependent mass bias parameter, in agreement with previous analyses. Our mean value of $1-b_H = 0.59\pm0.03$ is also in good agreement with the one estimated by the joint analysis of Planck cluster counts and CMB anisotropies. Our measurements of $bP_e\rangle$, at the level of $\sim10\%$ in each bin, are the most stringent constraints on the redshift dependence of this parameter to date, and agree well both with previous measurements and with theoretical expectations from shock-heating models.

@misc{koukoufilippas2019tomographic, abstract = {We cross-correlate maps of the thermal Sunyaev-Zeldovich (tSZ) Compton-$y$ parameter published by Planck with the projected distribution of galaxies in a set of low-redshift tomographic bins. We use the nearly full-sky 2MASS Photometric Redshift and WISE $\times$ SuperCOSMOS public catalogues, covering the redshift range $z\lesssim0.4$. Our measurements allow us to place constraints on the redshift dependence of the mass-observable relation for tSZ cluster count analyses in terms of the so-called 'hydrostatic mass bias' parameter $1-b_{\rm H}$. These results can also be interpreted as measurements of the bias-weighted average gas pressure $\langle bP_e\rangle$ as a function of redshift, a quantity that can be related to the thermodynamics of gas inside haloes and used to constrain energy injection processes. We measure $1-b_{\rm H}$ with $\sim13\%$ precision in 6 equispaced redshift bins, and find no evidence for a redshift-dependent mass bias parameter, in agreement with previous analyses. Our mean value of $1-b_{\rm H} = 0.59\pm0.03$ is also in good agreement with the one estimated by the joint analysis of Planck cluster counts and CMB anisotropies. Our measurements of $\langle bP_e\rangle$, at the level of $\sim10\%$ in each bin, are the most stringent constraints on the redshift dependence of this parameter to date, and agree well both with previous measurements and with theoretical expectations from shock-heating models.}, added-at = {2019-09-20T08:29:56.000+0200}, author = {Koukoufilippas, Nick and Alonso, David and Bilicki, Maciej and Peacock, John A.}, biburl = {https://www.bibsonomy.org/bibtex/26fcc11d2af19d011792e104e6f10b321/gpkulkarni}, description = {Tomographic measurement of the intergalactic gas pressure through galaxy-tSZ cross-correlations}, interhash = {ca92d831dd9623fdece2a801b209daa6}, intrahash = {6fcc11d2af19d011792e104e6f10b321}, keywords = {library}, note = {cite arxiv:1909.09102Comment: 19 pages, 10 figures. Submitted to MNRAS. Analysis pipeline available at https://github.com/nikfilippas/yxg}, timestamp = {2019-09-20T08:29:56.000+0200}, title = {Tomographic measurement of the intergalactic gas pressure through galaxy-tSZ cross-correlations}, url = {http://arxiv.org/abs/1909.09102}, year = 2019 }