[2304.06764] What Does the Virial Coefficient of the \Hb Broad-Line Region Depend On? Skip to main content Search Submit Donate Log in Search arXiv Press Enter to search · Advanced search Astrophysics > Astrophysics of Galaxies arXiv:2304.06764 (astro-ph) [Submitted on 13 Apr 2023] Title: What Does the Virial Coefficient of the \Hb Broad-Line Region 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 , Raul 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 View a PDF of the paper titled What Does the Virial Coefficient of the \Hb Broad-Line Region Depend On?, by Lizvette Villafa\~na and 39 other authors View PDF HTML (experimental) 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 log10(fmean,{\sigma}) and black hole mass, (ii) marginal evidence for a similar correlation between log10(frms,{\sigma}) and black hole mass, (iii) marginal evidence for an anti-correlation of BLR disk thickness with log10(fmean,FWHM)and log10(frms,FWHM), and (iv) marginal evidence for an anti-correlation of inclination angle with log10(fmean,FWHM), log10(frms,{\sigma}), and log10(fmean,{\sigma}). Lastly, we find marginal evidence for a correlation between line-profile shape, when using the root-meansquare spectrum, log10(FWHM/{\sigma})rms, and the virial coefficient, log10(frms,{\sigma}), and investigate how BLR properties might be related to line-profile shape using caramel models. Comments: 17 pages, 10 figures Subjects: Astrophysics of Galaxies (astro-ph.GA) Cite as: arXiv:2304.06764 [astro-ph.GA] (or arXiv:2304.06764v1 [astro-ph.GA] for this version) https://doi.org/10.48550/arXiv.2304.06764 Focus to learn more arXiv-issued DOI via DataCite Related DOI : https://doi.org/10.3847/1538-4357/accc84 Focus to learn more DOI(s) linking to related resources Submission history From: Lizvette Villafaña [ view email ] [v1] Thu, 13 Apr 2023 18:05:54 UTC (6,808 KB) Full-text links: Access Paper: View a PDF of the paper titled What Does the Virial Coefficient of the \Hb Broad-Line Region Depend On?, by Lizvette Villafa\~na and 39 other authors View PDF HTML (experimental) TeX Source view license Current browse context: astro-ph.GA < prev | next > new | recent | 2023-04 Change to browse by: astro-ph References & Citations NASA ADS Google Scholar Semantic Scholar export BibTeX citation Loading... BibTeX formatted citation × loading... 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