scholarly journals SEARCHING FOR BINARY SUPERMASSIVE BLACK HOLES VIA VARIABLE BROAD EMISSION LINE SHIFTS: LOW BINARY FRACTION

2017 ◽  
Vol 834 (2) ◽  
pp. 129 ◽  
Author(s):  
Lile Wang ◽  
Jenny E. Greene ◽  
Wenhua Ju ◽  
Roman R. Rafikov ◽  
John J. Ruan ◽  
...  
Keyword(s):  
Black Holes ◽  
Emission Line ◽  
Supermassive Black Holes ◽  
Broad Emission ◽  
Broad Emission Line

scholarly journals A New Luminosity Effect in QSO Spectra

1997 ◽  
Vol 159 ◽  
pp. 260-261
Author(s):  
Michael R. Corbin ◽  
Todd A. Boroson
Keyword(s):  
Black Holes ◽  
Emission Line ◽  
Electron Scattering ◽  
Strongly Correlated ◽  
Broad Line ◽  
Ultraviolet Continuum ◽  
Broad Line Region ◽  
Broad Emission ◽  
Line Region ◽  
Broad Emission Line

AbstractComparison of the emission-line and continuum parameters of 48 low-redshift QSOs reveals the asymmetry of the C IV λ1549 broad emission line to be strongly correlated with ultraviolet continuum luminosity, such that increasing luminosity produces increasing redward asymmetry. A similar correlation has been found for broad Hβ. Redward profile asymmetries can be modeled as the result of the gravitational redshift of line photons from the very broad-line region (VBLR) by 109–1010M⊙ black holes, but blueward profile asymmetries require a competing effect such as electron scattering.

scholarly journals Near infrared hydrogen emission line ratios as diagnostics of the broad emission line region

2012 ◽  
Vol 372 ◽  
pp. 012069
Author(s):  
Andrea J Ruff ◽  
David J E Floyd ◽  
Kirk T Korista ◽  
Rachel L Webster ◽  
Ryan L Porter ◽  
...  
Keyword(s):  
Emission Line ◽  
Near Infrared ◽  
Hydrogen Emission ◽  
Broad Emission ◽  
Line Region ◽  
Broad Emission Line ◽  
Hydrogen Emission Line

scholarly journals Broad emission line variability in 3C 273 *

1989 ◽  
Vol 240 (4) ◽  
pp. 741-751 ◽  
Author(s):  
P. T. O'Brien ◽  
W. Zheng ◽  
R. Wilson
Keyword(s):  
Emission Line ◽  
Broad Emission ◽  
Broad Emission Line

scholarly journals Upper limits on the mass of supermassive black holes from STIS archival data

2007 ◽  
Vol 3 (S245) ◽  
pp. 233-234
Author(s):  
A. Beifiori ◽  
E. M. Corsini ◽  
E. Dalla Bontà ◽  
A. Pizzella ◽  
L. Coccato ◽  
...  
Keyword(s):  
Black Holes ◽  
Emission Line ◽  
Supermassive Black Holes ◽  
Archival Data ◽  
Early Type ◽  
Preliminary Results ◽  
Upper Limits ◽  
Nearby Galaxies ◽  
Line Widths

AbstractThe growth of supermassive black holes (SMBHs) appears to be closely linked with the formation of spheroids. There is a pressing need to acquire better statistics on SMBH masses, since the existing samples are preferentially weighted toward early-type galaxies with very massive SMBHs. With this motivation we started a project aimed at measuring upper limits on the mass of the SMBHs that can be present in the center of all the nearby galaxies (D < 100 Mpc) for which STIS/G750M spectra are available in the HST archive. These upper limits will be derived by modeling the central emission-line widths ([N II] λλ6548, 6583, Hα and [S II] λλ6716, 6731) observed over an aperture of ~01 (R < 50 pc). Here we present our preliminary results for a subsample of 76 bulges.

scholarly journals The X-SHOOTER/ALMA Sample of Quasars in the Epoch of Reionization. I. NIR Spectral Modeling, Iron Enrichment, and Broad Emission Line Properties

2020 ◽  
Vol 905 (1) ◽  
pp. 51
Author(s):  
Jan-Torge Schindler ◽  
Emanuele Paolo Farina ◽  
Eduardo Bañados ◽  
Anna-Christina Eilers ◽  
Joseph F. Hennawi ◽  
...  
Keyword(s):  
Emission Line ◽  
Spectral Modeling ◽  
Iron Enrichment ◽  
Broad Emission ◽  
Broad Emission Line

scholarly journals Star Clusters in Quasars: Bloated Stars as Broad Emission Line Clouds

1989 ◽  
Vol 134 ◽  
pp. 137-138
Author(s):  
R. C. Puetter
Keyword(s):  
Black Hole ◽  
Emission Line ◽  
Star Clusters ◽  
Hole Formation ◽  
Line Radiation ◽  
Black Hole Formation ◽  
Broad Emission ◽  
Broad Emission Line

Many scenarios of the evolution of star clusters in the centers of galaxies involve the formation of a central supermassive object. Since black hole formation is not 100% efficient in mass usage, stars are left over. This paper investigates the properties of such stars and proposes that their externally heated atmospheres become “bloated” due to radiative forces from trapped line radiation. Such stars would swell to many times their normal diameters and acquire densities, sizes, and mean column masses typical of QSO/AGN emission line clouds (ELCs).

scholarly journals Velocity Diagnostics of the Broad Emission-Line Region of Active Galactic Nuclei

1997 ◽  
Vol 159 ◽  
pp. 175-178 ◽  
Author(s):  
Brian Espey
Keyword(s):  
Emission Line ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Nuclear Region ◽  
Driving Mechanisms ◽  
Broad Emission ◽  
Line Region ◽  
Broad Emission Line ◽  
Ongoing Project

AbstractWe present a brief review of emission-line velocity differences, and describe an ongoing project to determine the driving mechanisms responsible. We conclude with a brief outline of the use of velocity differences as probes of the conditions in the nuclear region of AGNs.

scholarly journals Hidden Blazars In Radio Loud Quasars?

2000 ◽  
Vol 195 ◽  
pp. 411-412
Author(s):  
F. Ma
Keyword(s):  
Emission Line ◽  
Star Model ◽  
Broad Emission ◽  
Broad Emission Line ◽  
Initial Results

We present the initial results from our search for hidden blazars via CIV emission line variability among radio loud quasars. The implications on models of quasar Broad Emission Line Regions are discussed, and we focus on the tidally disrupted star model.

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