scholarly journals Connections between Narrow Line Seyfert 1 Galaxies and Stellar Black Hole Candidates

2004 ◽  
Vol 155 ◽  
pp. 239-242
Author(s):  
Hitoshi Negoro
Keyword(s):  
Black Hole ◽  
Narrow Line ◽  
Black Hole Candidates

scholarly journals A good long look at the black hole candidates LMC X-1 and LMC X-3

2001 ◽  
Vol 320 (3) ◽  
pp. 316-326 ◽  
Author(s):  
M. A. Nowak ◽  
J. Wilms ◽  
W. A. Heindl ◽  
K. Pottschmidt ◽  
J. B. Dove ◽  
...  
Keyword(s):  
Black Hole ◽  
Black Hole Candidates

scholarly journals MODELING THE HARD STATES OF THREE BLACK HOLE CANDIDATES

2010 ◽  
Vol 717 (2) ◽  
pp. 929-936 ◽  
Author(s):  
Hui Zhang ◽  
Feng Yuan ◽  
Sylvain Chaty
Keyword(s):  
Black Hole ◽  
Black Hole Candidates

scholarly journals Observations of the γ-ray emitting narrow-line Seyfert 1, SBS 0846+513, and its host galaxy

2021 ◽  
Author(s):  
Timothy S Hamilton ◽  
Marco Berton ◽  
Sonia Antón ◽  
Lorenzo Busoni ◽  
Alessandro Caccianiga ◽  
...  
Keyword(s):  
Black Hole ◽  
Adaptive Optics ◽  
Host Galaxy ◽  
Narrow Line ◽  
Black Hole Mass ◽  
Residual Structure ◽  
Line Region ◽  
Resolution Imaging ◽  
Γ Ray ◽  
Adaptive Optics System

Abstract The γ-ray emitting galaxy SBS 0846 + 513 has been classified as a Narrow-Line Seyfert 1 (NLS1) from its spectroscopy, and on that basis would be thought likely to have a small central black hole hosted in a spiral galaxy. But very few of the γ-ray NLS1 have high-resolution imaging of their hosts, so it is unknown how the morphology expectation holds up for the γ-emitting class. We have observed this galaxy in the J-band with the Large Binocular Telescope’s LUCI1 camera and the ARGOS adaptive optics system. We estimate its black hole mass to lie between $4.2\times 10^7 \le \frac{\text{M}}{\text{M}_\odot } \le 9.7\times 10^7$, using the correlation with bulge luminosity, or $1.9\times 10^7 \le \frac{\text{M}}{\text{M}_\odot } \le 2.4\times 10^7$ using the correlation with Sérsic index. Our favoured estimate is 4.2 × 107M⊙, putting its mass at the high end of the NLS1 range in general but consistent with others that are γ-ray emitters. These estimates are independent of the Broad Line Region viewing geometry and avoid any underestimates due to looking down the jet axis. Its host shows evidence of a bulge + disc structure, from the isophote shape and residual structure in the nuclear-subtracted image. This supports the idea that γ-ray NLS1 may be spiral galaxies, like their non-jetted counterparts.

scholarly journals Independent Estimation of Black Hole Mass for the γ-ray-detected Archetypal Narrow-line Seyfert 1 Galaxy 1H 0323+342 from X-Ray Variability

2018 ◽  
Vol 866 (1) ◽  
pp. 69 ◽  
Author(s):  
Hai-Wu Pan ◽  
Weimin Yuan ◽  
Su Yao ◽  
S. Komossa ◽  
Chichuan Jin
Keyword(s):  
Black Hole ◽  
Narrow Line ◽  
Black Hole Mass ◽  
X Ray ◽  
Γ Ray
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