We use the Planck full mission temperature maps to examine the stacked thermal Sunyaev-Zel'dovich (tSZ) signal of 188042 "locally brightest galaxies'" (LBGs) selected from the Sloan Digital Sky Survey Data Release 7. Our LBG sample closely matches that of Planck Collaboration XI (2013, PCXI) but our analysis differs in several ways. We work directly in terms of physically observable quantities, requiring minimal assumptions about the gas pressure profile. We explicitly model the dust emission from each LBG and simultaneously measure both the stacked tSZ and dust signals as a function of stellar mass $M_*$. There is a small residual bias in stacked tSZ measurements; we measure this bias and subtract it from our results, finding that the effects are non-negligible at the lowest masses in the LBG sample. Finally, we compare our measurements with two pressure profile models, finding that the profile from Battaglia et al. (2012b) provides a better fit to the results than the Arnaud et al. (2010) "universal pressure profile." However, within the uncertainties, we find that the data are consistent with a self-similar scaling with mass --- more precise measurements are needed to detect the relatively small deviations from self-similarity predicted by these models. Consistent with PCXI, we measure the stacked tSZ signal from LBGs with stellar masses down to $\log_{10}(M_*/M_{\odot}) \sim 11.1-11.3$. For lower stellar masses, however, we do not see evidence for a stacked tSZ signal. We note that the stacked dust emission is comparable to, or larger than, the stacked tSZ signal for $\log_{10}(M_*/M_{\odot}) \lesssim 11.3$. Future tSZ analyses with larger samples and lower noise levels should be able to probe deviations from self-similarity and thus provide constraints on models of feedback and the evolution of hot halo gas over cosmic time.
Cluster properties as a function of dynamical state in the DESI Legacy x UNIONS surveys
University of Waterloo（滑铁卢大学）；Independent University, Bangladesh（孟加拉独立大学）；NASA Goddard Space Flight Center（美国宇航局戈达德太空飞行中心）；Ruhr University Bochum（波鸿鲁尔大学）；Perimeter Institute for Theoretical Physics（基础物理研究所）；University of Hawaii（夏威夷大学）；Carnegie Mellon University（卡内基梅隆大学）；National Research Council Herzberg Astronomy and Astrophysics（国家研究委员会赫茨伯格天文学和天体物理学研究所）；University of British Columbia（不列颠哥伦比亚大学）
Euclid: A blue galaxy population and a brightest cluster galaxy in the making in a $z\sim1.74$ MaDCoWS2 galaxy cluster candidate
Academia Sinica Institute of Astronomy and Astrophysics（中央研究院天文及天文物理研究所）；University of Florida（佛罗里达大学）；University of California, Davis（加州大学戴维斯分校）；Jet Propulsion Laboratory, California Institute of Technology（加州理工学院喷气推进实验室）；Korea Astronomy and Space Science Institute（韩国天体宇宙科学研究所）
