The cosmic X-ray background
E Boldt - Physics Reports, 1987 - Elsevier
As the sky in the microwave band is dominated by a cosmic background, so too is the X-ray
sky. In this report, the experimental approach used for measuring the X-ray background is …
sky. In this report, the experimental approach used for measuring the X-ray background is …
Emission-line regions of active galaxies and QSOs
DE Osterbrock, WG Mathews - … . Volume 24 (A87-26730 10-90) …, 1986 - adsabs.harvard.edu
Recently acquired narrow-and broad-line spectroscopic data on active galactic nuclei and
QSOs are reviewed, along with models which have been developed for the physical …
QSOs are reviewed, along with models which have been developed for the physical …
The emission-line properties of low-redshift quasi-stellar objects
TA Boroson, RF Green - … Series (ISSN 0067-0049), vol. 80, no …, 1992 - adsabs.harvard.edu
Spectra covering the region λλ4300-5700 have been obtained of all 87 QSOs in the BQS
catalog having redshifts less than 0.5. An empirical technique which allows the …
catalog having redshifts less than 0.5. An empirical technique which allows the …
Reverberation measurements for 17 quasars and the size-mass-luminosity relations in active galactic nuclei
Correlated variations in the line and continuum emission from active galactic nuclei (AGNs)
can be used to determine the size and geometry of the broad emission-line regions (BLRs) …
can be used to determine the size and geometry of the broad emission-line regions (BLRs) …
The Sloan Digital Sky Survey Reverberation Mapping Project: estimating masses of black holes in quasars with single-epoch spectroscopy
E Dalla Bontà, BM Peterson, MC Bentz… - The Astrophysical …, 2020 - iopscience.iop.org
It is well known that reverberation mapping of active galactic nuclei (AGNs) reveals a
relationship between AGN luminosity and the size of the broad-line region, and that use of …
relationship between AGN luminosity and the size of the broad-line region, and that use of …
Active galactic nucleus black hole masses and bolometric luminosities
Black hole mass, along with mass accretion rate, is a fundamental property of active galactic
nuclei (AGNs). Black hole mass sets an approximate upper limit to AGN energetics via the …
nuclei (AGNs). Black hole mass sets an approximate upper limit to AGN energetics via the …
The mass of quasars
Y Shen - arXiv preprint arXiv:1302.2643, 2013 - arxiv.org
I review the current status of quasar black hole (BH) mass estimations. Spectroscopic
methods have been developed to estimate BH mass in broad line quasars to an accuracy …
methods have been developed to estimate BH mass in broad line quasars to an accuracy …
Central masses and broad-line region sizes of active galactic nuclei. I. Comparing the photoionization and reverberation techniques
A Wandel, BM Peterson, MA Malkan - The Astrophysical Journal, 1999 - iopscience.iop.org
The masses and emission-line region sizes of active galactic nuclei (AGNs) can be
measured by" reverberation-mapping" techniques, and we use these results to calibrate …
measured by" reverberation-mapping" techniques, and we use these results to calibrate …
Collapse of primordial gas clouds and the formation of quasar black holes
The formation of quasar black holes during the hydrodynamic collapse of protogalactic gas
clouds is discussed. The dissipational collapse and long-term dynamical evolution of these …
clouds is discussed. The dissipational collapse and long-term dynamical evolution of these …
Determining central black hole masses in distant active galaxies
M Vestergaard - The Astrophysical Journal, 2002 - iopscience.iop.org
An empirical relationship, of particular interest for studies of high-redshift active galactic
nuclei (AGNs) and quasars, between the masses of their central black holes and rest-frame …
nuclei (AGNs) and quasars, between the masses of their central black holes and rest-frame …