The Lick AGN Monitoring Project 2016: Dynamical Modeling of Velocity-resolved Hβ Lags in Luminous Seyfert Galaxies
Lizvette Villafaña, P. R. Williams, Tommaso Treu, Brendon J. Brewer, Aaron J. Barth, U Vivian, Vardha N. Bennert, Heiko Vogler, Hengxiao Guo, Misty C. Bentz, Gabriela Canalizo, A. V. Filippenko, E. L. Gates, Frederick Hamann, M. D. Joner, Matthew A. Malkan, Jong-Hak Woo, Bela Abolfathi, Louis E. Abramson, Stephen F. Armen, Hyun‐Jin Bae, Thomas Bohn, Benjamin D. Boizelle, K. Azalee Bostroem, Andrew Brandel, Thomas G. Brink, Sanyum Channa, Michael C. Cooper, Maren Cosens, Edward Donohue, Sean P. Fillingham, D. González–Buitrago, Goni Halevi, Andrew Halle, Carol E. Hood, K. Horne, J. Chuck Horst, Maxime de Kouchkovsky, Benjamin Kuhn, Sahana Kumar, Douglas C. Leonard, Donald Loveland, Christina Manzano-King, I. M. McHardy, R. Michel, Melanie Kae B. Olaes, Daeseong Park, Songyoun Park, Liuyi Pei, Timothy W. Ross, Jordan N. Runco, Javier Sánchez, Bryan R. Scott, Remington O. Sexton, Jaejin Shin, I. Shivvers, Chance L. Spencer, Benjamin E. Stahl, Samantha Stegman, Isak Stomberg, S. Valenti, Jonelle L. Walsh, Heechan Yuk, WeiKang Zheng
Abstract
Abstract We have modeled the velocity-resolved reverberation response of the H β broad emission line in nine Seyfert 1 galaxies from the Lick Active Galactic Nucleus (AGN) Monitoring Project 2016 sample, drawing inferences on the geometry and structure of the low-ionization broad-line region (BLR) and the mass of the central supermassive black hole. Overall, we find that the H β BLR is generally a thick disk viewed at low to moderate inclination angles. We combine our sample with prior studies and investigate line-profile shape dependence, such as <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:msub> <mml:mrow> <mml:mi>log</mml:mi> </mml:mrow> <mml:mrow> <mml:mn>10</mml:mn> </mml:mrow> </mml:msub> <mml:mo stretchy="false">(</mml:mo> <mml:mi>FWHM</mml:mi> <mml:mrow> <mml:mo stretchy="true">/</mml:mo> </mml:mrow> <mml:mi>σ</mml:mi> <mml:mo stretchy="false">)</mml:mo> </mml:math> , on BLR structure and kinematics and search for any BLR luminosity-dependent trends. We find marginal evidence for an anticorrelation between the profile shape of the broad H β emission line and the Eddington ratio, when using the rms spectrum. However, we do not find any luminosity-dependent trends, and conclude that AGNs have diverse BLR structure and kinematics, consistent with the hypothesis of transient AGN/BLR conditions rather than systematic trends.