The Stacked Thermal SZ Signal of Locally Brightest Galaxies in Planck Full Mission Data: Evidence for Galaxy Feedback?

Understand

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 $M_*$.