evolution of black hole mass and spin in active galactic nuclei

evolution of black hole mass and spin in active galactic

Numerical simulation of black hole mass M (circles) and spin parameter a (solid curve) evolution versus accretion time (i.e. neglecting epochs when no mass accretes). The hole is assumed to accrete always at its current Eddington rate, through a sequence of disc accretion episodes with disc angular momentum J d randomly oriented with respect to that of the hole, J h .

The Evolution of Black Hole Mass and Spin in Active

The Evolution of Black Hole Mass and Spin in Active Galactic Nuclei Article in Monthly Notices of the Royal Astronomical Society 385(3) · January 2008 with 8 Reads DOI: 10.1111/j.1365-2966.2008

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The Evolution of Black Hole Mass and Spin in Active

slowly drains on to the black hole and powers the AGN. KP07 show that for local, low–luminosity AGN, fuelling by well separated episodes of this type explains observational features such as the luminosity function for moderate–mass black holes, and the presence and location of a ring of young stars observed about the Galactic Centre.

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The evolution of black hole mass and spin in active

The evolution of black hole mass and spin in active galactic nuclei A. R. King, 1 J. E. Pringle , 2 and J. A. Hofmann 3 1 Theoretical Astrophysics Group, University of Leicester, Leicester LE1 7RH

The Evolution of Black Hole Mass and Spin in Active

CiteSeerX – Document Details (Isaac Councill, Lee Giles, Pradeep Teregowda): Observations show that the central black hole in galaxies has a mass M only ∼ 10 −3 of the stellar bulge mass. Thus whatever process grows the black hole also promotes star formation with far higher efficiency. We interpret this in terms of the generic tendency of AGN accretion discs to become self–gravitating outside some small …

Published in: Monthly Notices of the Royal Astronomical Society · 2008Authors: A R King · J E Pringle · J E Pringle · J A HofmannAffiliation: University of Leicester · University of CambridgeAbout: Low Mass · Black hole · Viscosity · Oscillation · Accretion disc · Active galactic nucl…

The Evolution of Black Hole Mass and Spin in Active

We argue that supermassive black hole growth in AGN occurs via sequences of randomly–oriented accretion discs with angular momentum limited by self–gravity. Skip to main content Search the history of over 343 billion web pages on the Internet.

Title: The Evolution of Black Hole Mass and Spin in Active

Abstract: We argue that supermassive black hole growth in AGN occurs via sequences of randomly–oriented accretion discs with angular momentum limited by self–gravity. These stably co– or counter–align with the black hole spin with almost equal frequency.

The evolution of black hole mass and spin in active

Abstract Observations show that the central black hole in galaxies has a mass M of only ~10-3 of the stellar bulge mass. Thus, whatever process grows the black hole also promotes star …

Published in: Monthly Notices of the Royal Astronomical Society · 2008Authors: A R King · J E Pringle · J E Pringle · J A HofmannAffiliation: University of Leicester · University of CambridgeAbout: Low Mass · Black hole · Viscosity · Oscillation · Accretion disc · Active galactic nucl…
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THE INTEGRATED RELATIVISTIC IRON LINE FROM ACTIVE …

the SMBH spin distribution and evolution is necessary to develop a comprehensive theory of the growth of SMBHs and their impact on galaxy formation. Currently, the only direct measurement of SMBH spin is through fitting the broad Fe Kα line in active galactic nuclei (AGNs). The evolution of spins could be determined by fitting the broad

Published in: The Astrophysical Journal · 2010Authors: D R BallantyneAffiliation: Georgia Institute of TechnologyAbout: International X-ray Observatory · Black hole · Cosmic ray · X-ray background · Activ…

chap 21 Flashcards | Quizlet

1 billion solar masses – Models show that the luminosity of a bright active galactic nucleus can be explained through the accretion of matter toward a 1 billion (or so) solar mass black hole.

Galaxy Evolution Flashcards | Quizlet

– We do not know how the black hole mass determines the black hole galaxy. – Connection between galaxy evolution and origins of supermassive black holes = mysterious. Overview Facts of Galaxy Evolution – Starbursts, active galactic nuclei and quasars are temporary phases in the evolution …

Active galactic nucleus – Wikipedia

Supermassive black holes are now believed to exist in the centres of most if not all massive galaxies since the mass of the black hole correlates well with the velocity dispersion of the galactic bulge (the M-sigma relation) or with bulge luminosity.

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EVOLUTION OF WARPED ACCRETION DISKS IN ACTIVE …

black hole spin and the lifetime for which the feeding persists, which determines the observable episodic lifetimes of active galactic nuclei. We conclude that careful inclusion of the disk feeding at the outer boundaries is crucial for modeling the evolution of the black hole spin.

Published in: The Astrophysical Journal · 2013Authors: Yanrong Li · Jianmin Wang · Cheng Cheng · Jie QiuAffiliation: Chinese Academy of SciencesAbout: Radio galaxy · Spin-½ · Quasar · Accretion disc · Accretion · Black hole

Rapidly spinning massive black holes in active galactic

It is believed that quasars are powered by accretion on to massive black holes, and the growth of the massive black holes could be governed by mass accretion in quasars. The massive black holes [active galactic nuclei (AGN) relics] should be present in the centres of galaxies.