scholarly journals Finding Local Low-mass Supermassive Black Holes

2008 ◽  
Author(s):  
Smita Mathur ◽  
Himel Ghosh ◽  
Laura Ferrarese ◽  
Fabrizio Fiore ◽  
Sandip K. Chakrabarti ◽  
...  
Keyword(s):  
Black Holes ◽  
Supermassive Black Holes ◽  
Low Mass

AGN and the necessity of feedback

2005 ◽  
Vol 363 (1828) ◽  
pp. 695-704 ◽  
Author(s):  
Andrew J. Benson
Keyword(s):  
Black Holes ◽  
Star Formation ◽  
Galaxy Formation ◽  
Supermassive Black Holes ◽  
Observational Evidence ◽  
Theoretical Studies ◽  
Feedback Process ◽  
Low Mass

There is now good observational evidence that some type of feedback process must operate within galaxies. Such a process has long been thought to exist on the basis of theoretical studies of galaxy formation. This feedback is responsible for regulating the rate of star formation and thereby preventing the formation of an overabundance of low–mass galaxies. There is gathering evidence that this feedback process must somehow involve the supermassive black holes thought to dwell in the centres of galaxies.

scholarly journals Searching for Low-Mass Supermassive Black Holes

1999 ◽  
Vol 194 ◽  
pp. 422-423
Author(s):  
Michele Cappellari ◽  
Francesco Bertola ◽  
Enrico M. Corsini ◽  
José G. Funes ◽  
Alessandro Pizzella ◽  
...  
Keyword(s):  
Black Holes ◽  
Supermassive Black Holes ◽  
Low Mass

It has become generally accepted that most or possibly all ellipticals and bulges of spirals harbor supermassive black holes in their center (see Ho 1998 for a recent review).

scholarly journals The fates of merging supermassive black holes and a proposal for a new class of X-ray sources

2020 ◽  
Vol 498 (3) ◽  
pp. 3807-3816
Author(s):  
Charles Zivancev ◽  
Jeremiah Ostriker ◽  
Andreas H W Küpper
Keyword(s):  
Black Holes ◽  
Structure Formation ◽  
Hierarchical Structure ◽  
Dynamical Evolution ◽  
Supermassive Black Holes ◽  
Host Galaxy ◽  
X Ray ◽  
Massive Galaxies ◽  
New Class ◽  
Low Mass

ABSTRACT We perform N-body simulations on some of the most massive galaxies extracted from a cosmological simulation of hierarchical structure formation with total masses in the range 1012 M⊙ < Mtot < 3 × 1013 M⊙ from 4 ≥ z ≥ 0. After galactic mergers, we track the dynamical evolution of the infalling black holes (BHs) around their host’s central BHs (CBHs). From 11 different simulations, we find that, of the 86 infalling BHs with masses >104 M⊙, 36 merge with their host’s CBH, 13 are ejected from their host galaxy, and 37 are still orbiting at z = 0. Across all galaxies, 33 BHs are kicked to a higher orbit after close interactions with the CBH binary or multiple, after which only one of them merged with their hosts. These orbiting BHs should be detectable by their anomalous (not low-mass X-ray binary) spectra. The X-ray luminosities of the orbiting massive BHs at z = 0 are in the range $10^{28}-10^{43}\, \mathrm{erg}~\mathrm{s}^{-1}$, with a currently undetectable median value of $10^{33}\, \mathrm{erg}~\mathrm{s}^{-1}$. However, the most luminous ∼5 per cent should be detectable by existing X-ray facilities.

scholarly journals CLASSICAL BULGES, SUPERMASSIVE BLACK HOLES, AND AGN FEEDBACK: EXTENSION TO LOW-MASS GALAXIES

2015 ◽  
Vol 802 (2) ◽  
pp. 110 ◽  
Author(s):  
Zhankui Lu ◽  
H. J. Mo
Keyword(s):  
Black Holes ◽  
Supermassive Black Holes ◽  
Low Mass

scholarly journals Low-mass and high-mass supermassive black holes in radio-loud AGNs are spun-up in different evolution paths

2019 ◽  
Vol 19 (10) ◽  
pp. 144 ◽  
Author(s):  
Jing Wang ◽  
Min-Zhi Kong ◽  
Shun-Fang Liu ◽  
Da-Wei Xu ◽  
Qiang Zhang ◽  
...  
Keyword(s):  
Black Holes ◽  
Supermassive Black Holes ◽  
High Mass ◽  
Low Mass

scholarly journals Dissecting X-ray–Emitting Gas Around the Center of Our Galaxy

Science ◽  
2013 ◽  
Vol 341 (6149) ◽  
pp. 981-983 ◽  
Author(s):  
Q. D. Wang ◽  
M. A. Nowak ◽  
S. B. Markoff ◽  
F. K. Baganoff ◽  
S. Nayakshin ◽  
...  
Keyword(s):  
Black Holes ◽  
Massive Stars ◽  
Supermassive Black Holes ◽  
X Ray ◽  
Accretion Flow ◽  
Active Stars ◽  
The Galaxy ◽  
Low Mass ◽  
Low Levels ◽  
Rule Out

Most supermassive black holes (SMBHs) are accreting at very low levels and are difficult to distinguish from the galaxy centers where they reside. Our own Galaxy’s SMBH provides an instructive exception, and we present a close-up view of its quiescent x-ray emission based on 3 megaseconds of Chandra observations. Although the x-ray emission is elongated and aligns well with a surrounding disk of massive stars, we can rule out a concentration of low-mass coronally active stars as the origin of the emission on the basis of the lack of predicted iron (Fe) Kα emission. The extremely weak hydrogen (H)–like Fe Kα line further suggests the presence of an outflow from the accretion flow onto the SMBH. These results provide important constraints for models of the prevalent radiatively inefficient accretion state.

scholarly journals POWERFUL RADIO EMISSION FROM LOW-MASS SUPERMASSIVE BLACK HOLES FAVORS DISK-LIKE BULGES

2016 ◽  
Vol 833 (1) ◽  
pp. L2 ◽  
Author(s):  
J. Wang ◽  
Y. Xu ◽  
D. W. Xu ◽  
J. Y. Wei
Keyword(s):  
Black Holes ◽  
Radio Emission ◽  
Supermassive Black Holes ◽  
Powerful Radio ◽  
Powerful Radio Emission ◽  
Low Mass

scholarly journals THE FORMATION OF SUPERMASSIVE BLACK HOLES FROM LOW-MASS POP III SEEDS

2012 ◽  
Vol 756 (1) ◽  
pp. L19 ◽  
Author(s):  
Daniel J. Whalen ◽  
Chris L. Fryer
Keyword(s):  
Black Holes ◽  
Supermassive Black Holes ◽  
Low Mass

scholarly journals AMUSE‐Virgo. I. Supermassive Black Holes in Low‐Mass Spheroids

2008 ◽  
Vol 680 (1) ◽  
pp. 154-168 ◽  
Author(s):  
Elena Gallo ◽  
Tommaso Treu ◽  
Jeremy Jacob ◽  
Jong‐Hak Woo ◽  
Philip J. Marshall ◽  
...  
Keyword(s):  
Black Holes ◽  
Supermassive Black Holes ◽  
Low Mass
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