SEARCHING FOR FOSSIL EVIDENCE OF AGN FEEDBACK IN WISE-SELECTED STRIPE-82 GALAXIES BY MEASURING THE THERMAL SUNYAEV-ZEL'DOVICH EFFECT WITH THE ATACAMA COSMOLOGY TELESCOPE

被引：18
作者：
Spacek, Alexander [1 ]
Scannapieco, Evan [1 ]
Cohen, Seth [1 ]
Joshi, Bhavin [1 ]
Mauskopf, Philip [1 ]
机构：
[1] Arizona State Univ, Sch Earth & Space Explorat, POB 876004, Tempe, AZ 85287 USA
来源：
ASTROPHYSICAL JOURNAL | 2017年 / 834卷 / 02期
基金：
美国国家科学基金会; 加拿大创新基金会;
关键词：
cosmic background radiation; galaxies: evolution; intergalactic medium; large-scale structure of universe; quasars: general; SUPERMASSIVE BLACK-HOLES; ACTIVE GALACTIC NUCLEI; QUASAR OUTFLOW CONTRIBUTION; EXTRAGALACTIC LEGACY SURVEY; LOCALLY BRIGHTEST GALAXIES; ABSORPTION-LINE QUASARS; STAR-FORMATION RATES; DARK-MATTER HALOS; LARGE-SCALE SHOCK; X-RAY CAVITIES;
D O I：
10.3847/1538-4357/834/2/102
中图分类号：
P1 [天文学];
学科分类号：
0704 ;
摘要：
We directly measure the thermal energy of the gas surrounding galaxies through the thermal Sunyaev-Zel'dovich (tSZ) effect. We perform a stacking analysis of microwave background images from the Atacama Cosmology Telescope, around 1179 massive quiescent elliptical galaxies at 0.5 <= z <= 1.0 ("low-z") and 3274 galaxies at 1.0 <= z <= 1.5 ("high-z"), selected using data from the Wide-field Infrared Survey Explorer All-Sky Survey and the Sloan Digital Sky Survey (SDSS) within the SDSS Stripe-82 field. The gas surrounding these galaxies is expected to contain energy from past episodes of active galactic nucleus (AGN) feedback, and after using modeling to subtract undetected contaminants, we detect a tSZ signal at a significance of 0.9 sigma for our low-z galaxies and 1.8 sigma for our high-z galaxies. We then include data from the high-frequency Planck bands for a subset of 227 low-z galaxies and 529 high-z galaxies and find low-z and high-z tSZ detections of 1.0 sigma and 1.5 sigma, respectively. These results indicate an average thermal heating around these galaxies of (5.6(-5.6)(+5.9)) x 10(60) erg for our low-z galaxies and (7.0(-4.4)(+4.7)) x 10(60) erg for our high-z galaxies. Based on simple heating models, these results are consistent with gravitational heating without additional heating due to AGN feedback.
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页数：16
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