No Significant Evolution of Relations between Black Hole Mass and Galaxy Total Stellar Mass Up to z ∼ 2.5

Journal
Date Issued
2020
Author(s)
Suh, Hyewon
•
Civano, Francesca
•
Trakhtenbrot, Benny
•
Shankar, Francesco
•
Hasinger, Günther
•
Sanders, David B.
•
DOI
Abstract
We investigate the cosmic evolution of the ratio between black hole (BH) mass (MBH) and host galaxy total stellar mass (Mstellar) out to z ∼ 2.5 for a sample of 100 X-ray-selected moderate-luminosity, broad-line active galactic nuclei (AGNs) in the Chandra-COSMOS Legacy Survey. By taking advantage of the deep multiwavelength photometry and spectroscopy in the COSMOS field, we measure in a uniform way the galaxy total stellar mass using an spectral energy distribution decomposition technique and the BH mass based on broad emission line measurements and single-epoch virial estimates. Our sample of AGN host galaxies has total stellar masses of 1010-12M⊙, and BH masses of 107.0-9.5M⊙. Combining our sample with the relatively bright AGN samples from the literature, we find no significant evolution of the MBH-Mstellar relation with the BH-to-host total stellar mass ratio of MBH/Mstellar ∼ 0.3% at all redshifts probed. We conclude that the average BH-to-host stellar mass ratio appears to be consistent with the local value within the uncertainties, suggesting a lack of evolution of the MBH-Mstellar relation up to z ∼ 2.5.
Volume
889
Issue
1
Start page
32
Uri
Url
Issn Identifier
0004-637X
Ads BibCode
2020ApJ...889...32S
Rights
open.access
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