Accretion disks around massive black holes - Persistent emission spectra

1978 ◽  
Vol 224 ◽  
pp. 53 ◽  
Author(s):  
D. M. Eardley ◽  
D. G. Payne ◽  
A. P. Lightman ◽  
S. L. Shapiro
Keyword(s):  
Black Holes ◽  
Accretion Disks ◽  
Emission Spectra ◽  
Massive Black Holes

scholarly journals Gaseous Disks in the Nuclei of Elliptical Galaxies

1997 ◽  
Vol 163 ◽  
pp. 620-625 ◽  
Author(s):  
H. Ford ◽  
Z. Tsvetanov ◽  
L. Ferrarese ◽  
G. Kriss ◽  
W. Jaffe ◽  
...  
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Angular Momentum ◽  
Accretion Disks ◽  
Large Scale ◽  
Elliptical Galaxies ◽  
Central Mass ◽  
Massive Black Holes ◽  
Radio Jets

AbstractHST images have led to the discovery that small (r ~ 1″ r ~ 100 – 200 pc), well-defined, gaseous disks are common in the nuclei of elliptical galaxies. Measurements of rotational velocities in the disks provide a means to measure the central mass and search for massive black holes in the parent galaxies. The minor axes of these disks are closely aligned with the directions of the large–scale radio jets, suggesting that it is angular momentum of the disk rather than that of the black hole that determines the direction of the radio jets. Because the disks are directly observable, we can study the disks themselves, and investigate important questions which cannot be directly addressed with observations of the smaller and unresolved central accretion disks. In this paper we summarize what has been learned to date in this rapidly unfolding new field.

Nucleosynthesis inside thick accretion disks around black holes. II - Results for massive black holes

1989 ◽  
Vol 336 ◽  
pp. 572 ◽  
Author(s):  
Liping Jin ◽  
W. David Arnett ◽  
Sandip K. Chakrabarti
Keyword(s):  
Black Holes ◽  
Accretion Disks ◽  
Massive Black Holes

scholarly journals A Consequence of the Asymmetry of Jets in Quasars and Active Nuclei of Galaxies

1982 ◽  
Vol 97 ◽  
pp. 475-481
Author(s):  
I. S. Shklovsky
Keyword(s):  
Black Holes ◽  
Radio Emission ◽  
Accretion Disks ◽  
Radio Galaxies ◽  
Powerful Radio ◽  
Recoil Momentum ◽  
Massive Black Holes ◽  
Powerful Radio Emission ◽  
The Asymmetry ◽  
Quasars And Radio Galaxies

It is concluded that many, if not most, jets are truly one-sided. The hypothesis that the powerful radio emission of quasars and radio galaxies is caused by ejections of “plasmoids” originating in super-critical accretion on massive black holes is discussed. Because of asymmetry in the ejection of plasmoids from the thick accretion disks which form around massive black holes, the latter acquire considerable recoil momentum and should escape from the nuclei of the galaxies with large velocities. This provides a possibility for explaining a number of evolutionary effects and an approach to solving the problem of “dead” quasars.

A TWO-STEP MECHANISM FOR PARTICLE ACCELERATION IN THE MAGNETOSPHERE OF ACCRETING BLACK HOLES

2008 ◽  
Vol 17 (09) ◽  
pp. 1585-1590
Author(s):  
YA. ISTOMIN ◽  
H. SOL
Keyword(s):  
Black Holes ◽  
Black Hole ◽  
Active Galactic Nuclei ◽  
Accretion Disks ◽  
Gamma Rays ◽  
Galactic Nuclei ◽  
Massive Black Holes ◽  
Relativistic Beaming ◽  
Ejection Process ◽  
Step Mechanism

Fast variability now observed in VHE gamma-rays from active galactic nuclei (PKS 2155–304, M87, Mkn 501) seems to require very small TeV emitting zones, even in the presence of a significant relativistic beaming. We explore the possibility to accelerate particles up to VHE energies in such small compact regions around massive black holes, taking into account the two places in the black hole surroundings where efficient acceleration can be expected during the accretion-ejection process, namely turbulent low-luminosity accretion disks and rotating magnetospheres.

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