Supermassive Black Holes with High Accretion Rates in Active Galactic Nuclei. VIII. Structure of the Broad-line Region and Mass of the Central Black Hole in Mrk 142

This is the eighth in a series of papers reporting on a large reverberation mapping (RM) campaign to measure black hole (BH) mass in active galactic nuclei with high accretion rates. We employ the recently developed dynamical modeling approach for broad-line regions (BLRs) based on the method of Pan...

Full description

Saved in:
Bibliographic Details
Published in:The Astrophysical journal 2018-12, Vol.869 (2), p.137
Main Authors: Li, Yan-Rong, Songsheng, Yu-Yang, Qiu, Jie, Hu, Chen, Du, Pu, Lu, Kai-Xing, Huang, Ying-Ke, Bai, Jin-Ming, Bian, Wei-Hao, Yuan, Ye-Fei, Ho, Luis C., Wang, Jian-Min
Format: Article
Language:English
Subjects:
Accretion
Accretion disks
Active galactic nuclei
Astrophysics
Bayesian analysis
black hole physics
Black holes
Clouds
Computer simulation
Emission
Emission lines
galaxies: active
galaxies: individual (Mrk 142)
Mapping
Markov chains
Nonlinear response
Parallel processing
Parameter uncertainty
quasars: general
Random walk
Supermassive black holes
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:This is the eighth in a series of papers reporting on a large reverberation mapping (RM) campaign to measure black hole (BH) mass in active galactic nuclei with high accretion rates. We employ the recently developed dynamical modeling approach for broad-line regions (BLRs) based on the method of Pancoast et al. to analyze the RM data set of Mrk 142 observed in the first monitoring season. In this approach, continuum variations are reconstructed using a damped random walk process, and BLR structure is delineated using a flexible disk-like geometry, in which BLR clouds move around the central BH with Keplerian orbits or inflow/outflow motion. The approach also includes the possibilities of anisotropic emission from BLR clouds, nonlinear response of the line emission to the continuum, and different long-term trends in the continuum and emission-line variations. We implement the approach in a Bayesian framework that is apt for parallel computation and use a Markov chain Monte Carlo technique to recover the parameters and uncertainties for the modeling, including the mass of the central BH. We apply three BLR models with different prescriptions of BLR cloud distributions and find that the best model for fitting the data of Mrk 142 is a two-zone BLR model, consistent with the theoretical BLR model surrounding slim accretion disks. The best model yields a BH mass of , resulting in a virial factor of for the full width at half maximum of the Hβ line measured from the mean spectrum. The virial factors for the other measures of the Hβ line width are also presented.
ISSN:0004-637X
1538-4357
DOI:10.3847/1538-4357/aaee6b