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The Lick AGN Monitoring Project 2011: Dynamical Modeling of the Broad-line Region

Peter R. Williams, Anna Pancoast, Tommaso Treu, Brendon J. Brewer, Aaron J. Barth, Vardha N. Bennert, Tabitha Buehler, Gabriela Canalizo, S. Bradley Cenko, Kelsey I. Clubb, Michael C. Cooper, Alexei V. Filippenko (+13 others)
2018 Astrophysical Journal  

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2018 pre-print
arXiv:1809.05113v1 fatcat:ejtr54gembbrnaybarttqjlryq
We present models of the Hβ-emitting broad-line region (BLR) in seven Seyfert 1 galaxies from the Lick AGN (Active Galactic Nucleus) Monitoring Project 2011 sample, drawing inferences on the BLR structure and dynamics as well as the mass of the central supermassive black hole. We find that the BLR is generally a thick disk, viewed close to face-on, with preferential emission back toward the ionizing source. The dynamics in our sample range from near-circular elliptical orbits to inflowing or
more » ... flowing trajectories. We measure black hole masses of _10(M_ BH/M_) = 6.48^+0.21_-0.18 for PG 1310-108, 7.50^+0.25_-0.18 for Mrk 50, 7.46^+0.15_-0.21 for Mrk 141, 7.58^+0.08_-0.08 for Mrk 279, 7.11^+0.20_-0.17 for Mrk 1511, 6.65^+0.27_-0.15 for NGC 4593, and 6.94^+0.14_-0.14 for Zw 229-015. We use these black hole mass measurements along with cross-correlation time lags and line widths to recover the scale factor f used in traditional reverberation mapping measurements. Combining our results with other studies that use this modeling technique, bringing our sample size to 16, we calculate a scale factor that can be used for measuring black hole masses in other reverberation mapping campaigns. When using the root-mean-square (rms) spectrum and using the line dispersion to measure the line width, we find _10(f_ rms,σ)_ pred = 0.57 ± 0.19. Finally, we search for correlations between f and other AGN and BLR parameters and find marginal evidence that f is correlated with M_ BH and the BLR inclination angle, but no significant evidence of a correlation with the AGN luminosity or Eddington ratio.
doi:10.3847/1538-4357/aae086 fatcat:4pmutzdnine57euiuczhzgzqty
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Citation

Peter R. Williams, Anna Pancoast, Tommaso Treu, Brendon J. Brewer, Aaron J. Barth, Vardha N. Bennert, Tabitha Buehler, Gabriela Canalizo, S. Bradley Cenko, Kelsey I. Clubb, Michael C. Cooper, Alexei V. Filippenko, Elinor Gates, Sebastian F. Hoenig, Michael D. Joner, Michael T. Kandrashoff, Clifton David Laney, Mariana S. Lazarova, Weidong Li, Matthew A. Malkan, Jacob Rex, Jeffrey M. Silverman, Erik Tollerud, Jonelle L. Walsh, Jong-Hak Woo. "The Lick AGN Monitoring Project 2011: Dynamical Modeling of the Broad-line Region." Astrophysical Journal 866.2 (2018) 75