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Title: The COS-Holes Survey: Connecting Galaxy Black Hole Mass with the State of the CGM
Abstract

We present an analysis of Hubble Space Telescope COS/G160M observations of CIVin the inner circumgalactic medium (CGM) of a novel sample of eightz∼ 0,LLgalaxies, paired with UV-bright QSOs at impact parameters (Rproj) between 25 and 130 kpc. The galaxies in this stellar-mass-controlled sample (log10M/M∼ 10.2–10.9M) host supermassive black holes (SMBHs) with dynamically measured masses spanning log10MBH/M∼ 6.8–8.4; this allows us to compare our results with models of galaxy formation where the integrated feedback history from the SMBH alters the CGM over long timescales. We find that the CIVcolumn density measurements (NC IV; average log10NC IV,CH= 13.94 ± 0.09 cm−2) are largely consistent with existing measurements from other surveys ofNC IVin the CGM (average log10NC IV,Lit= 13.90 ± 0.08 cm−2), but do not show obvious variation as a function of the SMBH mass. By contrast, specific star formation rate (sSFR) is highly correlated with the ionized content of the CGM. We find a large spread in sSFR for galaxies with log10MBH/M> 7.0, where the CGM CIVcontent shows a clear dependence on galaxy sSFR but notMBH. Our results do not indicate an obvious causal link between CGM CIVand the mass of the galaxy’s SMBH; however, through comparisons to the EAGLE, Romulus25, and IllustrisTNG simulations, we find that our sample is likely too small to constrain such causality.

 
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Award ID(s):
2009230
PAR ID:
10553013
Author(s) / Creator(s):
; ; ; ; ; ; ; ; ; ; ;
Publisher / Repository:
Astrophysical Journal
Date Published:
Journal Name:
The Astrophysical Journal
Volume:
970
Issue:
2
ISSN:
0004-637X
Page Range / eLocation ID:
115
Format(s):
Medium: X
Sponsoring Org:
National Science Foundation
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