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What Does the Geometry of the Hβ BLR Depend On?

Authors :
Lizvette Villafaña
Peter R. Williams
Tommaso Treu
Brendon J. Brewer
Aaron J. Barth
Vivian U
Vardha N. Bennert
Hengxiao Guo
Misty C. Bentz
Gabriela Canalizo
Alexei V. Filippenko
Elinor Gates
Michael D. Joner
Matthew A. Malkan
Jong-Hak Woo
Bela Abolfathi
Thomas Bohn
K. Azalee Bostroem
Andrew Brandel
Thomas G. Brink
Sanyum Channa
Maren Cosens
Edward Donohue
Goni Halevi
Carol E. Hood
J. Chuck Horst
Maxime de Kouchkovsky
Benjamin Kuhn
Douglas C. Leonard
Raúl Michel
Melanie Kae B. Olaes
Daeseong Park
Jordan N. Runco
Remington O. Sexton
Isaac Shivvers
Chance L. Spencer
Benjamin E. Stahl
Samantha Stegman
Jonelle L. Walsh
WeiKang Zheng
Source :
The Astrophysical Journal, Vol 948, Iss 2, p 95 (2023)
Publication Year :
2023
Publisher :
IOP Publishing, 2023.

Abstract

We combine our dynamical modeling black-hole mass measurements from the Lick AGN Monitoring Project 2016 sample with measured cross-correlation time lags and line widths to recover individual scale factors, f , used in traditional reverberation-mapping analyses. We extend our sample by including prior results from Code for AGN Reverberation and Modeling of Emission Lines ( caramel ) studies that have utilized our methods. Aiming to improve the precision of black-hole mass estimates, as well as uncover any regularities in the behavior of the broad-line region (BLR), we search for correlations between f and other AGN/BLR parameters. We find (i) evidence for a correlation between the virial coefficient ${\mathrm{log}}_{10}({f}_{\mathrm{mean},\sigma })$ and black-hole mass, (ii) marginal evidence for a similar correlation between ${\mathrm{log}}_{10}({f}_{\mathrm{rms},\sigma })$ and black-hole mass, (iii) marginal evidence for an anticorrelation of BLR disk thickness with ${\mathrm{log}}_{10}({f}_{\mathrm{mean},\mathrm{FWHM}})$ and ${\mathrm{log}}_{10}({f}_{\mathrm{rms},\mathrm{FWHM}})$ , and (iv) marginal evidence for an anticorrelation of inclination angle with ${\mathrm{log}}_{10}({f}_{\mathrm{mean},\mathrm{FWHM}})$ , ${\mathrm{log}}_{10}({f}_{\mathrm{rms},\sigma })$ , and ${\mathrm{log}}_{10}({f}_{\mathrm{mean},\sigma })$ . Last, we find marginal evidence for a correlation between line-profile shape, when using the root-mean-square spectrum, ${\mathrm{log}}_{10}{(\mathrm{FWHM}/\sigma )}_{\mathrm{rms}}$ , and the virial coefficient, ${\mathrm{log}}_{10}({f}_{\mathrm{rms},\sigma })$ , and investigate how BLR properties might be related to line-profile shape using caramel models.

Details

Language :
English
ISSN :
15384357
Volume :
948
Issue :
2
Database :
Directory of Open Access Journals
Journal :
The Astrophysical Journal
Publication Type :
Academic Journal
Accession number :
edsdoj.0a962c5761b7483ebb44cb11f96f24c4
Document Type :
article
Full Text :
https://doi.org/10.3847/1538-4357/accc84