scholarly journals A SCALING RELATION BETWEEN MEGAMASER DISK RADIUS AND BLACK HOLE MASS IN ACTIVE GALACTIC NUCLEI

2012 ◽  
Vol 750 (2) ◽  
pp. L38 ◽  
Author(s):  
Mark Wardle ◽  
Farhad Yusef-Zadeh
Keyword(s):  
Black Hole ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Scaling Relation ◽  
Black Hole Mass ◽  
Disk Radius

scholarly journals ON THE BLACK HOLE MASS—X-RAY EXCESS VARIANCE SCALING RELATION FOR ACTIVE GALACTIC NUCLEI IN THE LOW-MASS REGIME

2015 ◽  
Vol 808 (2) ◽  
pp. 163 ◽  
Author(s):  
Hai-Wu Pan ◽  
Weimin Yuan ◽  
Xin-Lin Zhou ◽  
Xiao-Bo Dong ◽  
Bifang Liu
Keyword(s):  
Black Hole ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Scaling Relation ◽  
Black Hole Mass ◽  
X Ray ◽  
Low Mass

scholarly journals The Jet Power, Radio Loudness, and Black Hole Mass in Radio‐loud Active Galactic Nuclei

2006 ◽  
Vol 637 (2) ◽  
pp. 669-681 ◽  
Author(s):  
Yi Liu ◽  
Dong Rong Jiang ◽  
Min Feng Gu
Keyword(s):  
Black Hole ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Black Hole Mass ◽  
Jet Power

scholarly journals X-ray variability of 104 active galactic nuclei

2012 ◽  
Vol 8 (S290) ◽  
pp. 37-40
Author(s):  
O. González-Martín ◽  
S. Vaughan
Keyword(s):  
Black Hole ◽  
Active Galactic Nuclei ◽  
Power Law ◽  
Galactic Nuclei ◽  
Power Law Model ◽  
Black Hole Mass ◽  
Periodic Oscillations ◽  
Fundamental Plane ◽  
X Ray ◽  
Single Power

AbstractWe have performed a uniform analysis of the power spectrum densities (PSDs) of 104 nearby (z<0.4) active galactic nuclei (AGN) using 209 XMM-Newton/pn observations, including several AGN classes. These PSDs span ≃ 3 decades in temporal frequencies, ranging from minutes to days. We have fitted each PSD to two models: (1) a single power-law model and (2) a bending power-law model. A fraction of 72% show significant variability. The PSD of the majority of the variable AGN was well described by a simple power-law with a mean index of α = 2.01±0.01. In 15 sources we found that the bending power law model was preferred with a mean slope of α = 3.08±0.04 and a mean bend frequency of 〈νb〉 ≃ 2 × 10−4 Hz. Only KUG 1031+398 (RE J1034+396) shows evidence for quasi-periodic oscillations. The ‘fundamental plane’ relating variability timescale, black hole mass, and luminosity is demonstrated using the new X-ray timing results presented here together with a compilation of the previously detected timescales from the literature.

scholarly journals CHARACTERIZATION OF A SAMPLE OF INTERMEDIATE-TYPE ACTIVE GALACTIC NUCLEI. II. HOST BULGE PROPERTIES AND BLACK HOLE MASS ESTIMATES

2013 ◽  
Vol 763 (2) ◽  
pp. 136 ◽  
Author(s):  
Erika Benítez ◽  
Jairo Méndez-Abreu ◽  
Isaura Fuentes-Carrera ◽  
Irene Cruz-González ◽  
Benoni Martínez ◽  
...  
Keyword(s):  
Black Hole ◽  
Active Galactic Nuclei ◽  
Galactic Nuclei ◽  
Black Hole Mass ◽  
Intermediate Type
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