scholarly journals THE LICK AGN MONITORING PROJECT: BROAD-LINE REGION RADII AND BLACK HOLE MASSES FROM REVERBERATION MAPPING OF Hβ

2009 ◽  
Vol 705 (1) ◽  
pp. 199-217 ◽  
Author(s):  
Misty C. Bentz ◽  
Jonelle L. Walsh ◽  
Aaron J. Barth ◽  
Nairn Baliber ◽  
Vardha Nicola Bennert ◽  
...  
Keyword(s):  
Black Hole ◽  
Broad Line ◽  
Reverberation Mapping ◽  
Broad Line Region ◽  
Line Region ◽  
Black Hole Masses

A Photoionization Method for Estimating Black Hole Masses in Quasars

2018 ◽  
Vol 14 (S342) ◽  
pp. 270-271
Author(s):  
C. Alenka Negrete ◽  
Deborah Dultzin ◽  
Paola Marziani ◽  
Jack W. Sulentic ◽  
M. L. Martínez-Aldama
Keyword(s):  
Black Hole ◽  
High Redshift ◽  
Broad Line ◽  
Reverberation Mapping ◽  
Physical Conditions ◽  
Broad Line Region ◽  
Supermassive Black Hole ◽  
Line Region ◽  
Black Hole Masses

AbstractWe present a method that uses photoionization codes (CLOUDY) to estimate the supermassive black hole masses (MBH) for quasars at low and high redshift. This method is based on the determination of the physical conditions of the broad line region (BLR) using observational diagnostic diagrams from line ratios in the UV. We also considered that the density and metallicity of the BLR in quasars at high z could be different from those at the nearby Universe. The computed black hole masses obtained using this method are in agreement with those derived from the method of reverberation mapping.

scholarly journals Reverberation Mapping Measurements of Black Hole Masses and Broad-line Region Kinematics in Mrk 817 and NGC 7469

2021 ◽  
Vol 918 (2) ◽  
pp. 50
Author(s):  
Kai-Xing Lu ◽  
Jian-Guo Wang ◽  
Zhi-Xiang Zhang ◽  
Ying-Ke Huang ◽  
Liang Xu ◽  
...  
Keyword(s):  
Black Hole ◽  
Broad Line ◽  
Reverberation Mapping ◽  
Broad Line Region ◽  
Line Region ◽  
Black Hole Masses ◽  
Ngc 7469

scholarly journals Reverberation Mapping of Two Luminous Quasars: The Broad-line Region Structure and Black Hole Mass

2021 ◽  
Vol 920 (1) ◽  
pp. 9
Author(s):  
Sha-Sha Li ◽  
Sen Yang ◽  
Zi-Xu Yang ◽  
Yong-Jie Chen ◽  
Yu-Yang Songsheng ◽  
...  
Keyword(s):  
Black Hole ◽  
Broad Line ◽  
Black Hole Mass ◽  
Reverberation Mapping ◽  
Broad Line Region ◽  
Line Region

scholarly journals High-Redshift Quasar Monitoring Campaign: Preliminary Results

2009 ◽  
Vol 5 (S267) ◽  
pp. 198-198 ◽  
Author(s):  
Ismael Botti ◽  
Paulina Lira ◽  
Hagai Netzer ◽  
Shai Kaspi
Keyword(s):  
Black Hole ◽  
High Redshift ◽  
Broad Line ◽  
Black Hole Mass ◽  
High Luminosity ◽  
Monitoring Campaign ◽  
Reverberation Mapping ◽  
Broad Line Region ◽  
Line Region ◽  
Region Size

AbstractWe present a monitoring campaign on high-luminosity quasars which will extend the existing reverberation mapping results by two orders of magnitude in luminosity, probing the broad-line region size and black hole mass of luminous AGN at redshift ~ 2 – 3.

scholarly journals Modelling the AGN broad line region using single-epoch spectra – I. The test case of Arp 151

2019 ◽  
Vol 489 (2) ◽  
pp. 1899-1918 ◽  
Author(s):  
S I Raimundo ◽  
A Pancoast ◽  
M Vestergaard ◽  
M R Goad ◽  
A J Barth
Keyword(s):  
Black Hole ◽  
High Redshift ◽  
Monitoring Data ◽  
Test Case ◽  
Broad Line ◽  
Broad Line Region ◽  
Line Region ◽  
Single Epoch ◽  
Black Hole Masses ◽  
Dynamical Modelling

ABSTRACT We show that individual (single-epoch) spectra of active galactic nuclei (AGNs) can constrain some of the geometry and dynamics of the AGN broad line region. Studies of the cosmic influence of supermassive black holes are limited by the current large uncertainties in the determination of black hole masses. One dominant limitation is the unknown geometry, dynamics, and line-of-sight inclination of the broad line region, used to probe the central black hole mass. Recent progress has been made to constrain the spatial and kinematic structure of the broad line region using dynamical modelling of AGN monitoring data and an underlying physical model for the broad line region. In this work we test the ability of a modified version of this dynamical modelling code to constrain the broad line region structure using single-epoch spectra. We test our modelling code on single-epoch spectra of nearby Arp 151 by comparing our results with those obtained with monitoring data of this same object. We find that a significant fraction of the broad line region parameters can indeed be adequately constrained, with uncertainties that are comparable to, or at most a factor of approximately a few higher than those obtained from modelling of monitoring data. Considering the wealth of available single-epoch spectroscopic observations, this method is promising for establishing the overall AGN population trends in the geometry and dynamics of the broad line region. This method can be applied to spectra of AGNs at low and high redshift making it valuable for studies of cosmological black hole and AGN evolution.

scholarly journals Toward Precision Measurement of Central Black Hole Masses

2009 ◽  
Vol 5 (S267) ◽  
pp. 151-160 ◽  
Author(s):  
Bradley M. Peterson
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Host Galaxy ◽  
Reverberation Mapping ◽  
Line Region ◽  
The Masses ◽  
The Relationship ◽  
Black Hole Masses ◽  
Intrinsic Scatter ◽  
Direct And Indirect Methods

AbstractWe review briefly direct and indirect methods of measuring the masses of black holes in galactic nuclei, and then focus attention on supermassive black holes in active nuclei, with special attention to results from reverberation mapping and their limitations. We find that the intrinsic scatter in the relationship between the AGN luminosity and the broad-line region size is very small, ~0.11 dex, comparable to the uncertainties in the better reverberation measurements. We also find that the relationship between reverberation-based black hole masses and host-galaxy bulge luminosities also seems to have surprisingly little intrinsic scatter, ~0.17 dex. We note, however, that there are still potential systematics that could affect the overall mass calibration at the level of a factor of a few.

scholarly journals Reverberation Mapping and Broad-Line Region Models

1997 ◽  
Vol 159 ◽  
pp. 138-145
Author(s):  
D. Maoz
Keyword(s):  
Broad Line ◽  
Future Directions ◽  
Reverberation Mapping ◽  
Broad Line Region ◽  
Line Region ◽  
Mapping Point

AbstractI review what we have learned about the BLR from reverberation mapping, point to some problems and complications that have emerged, and outline some future directions.

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