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Interaction of supermassive black holes with their stellar and dark matter environments
(Springer, 2005-06-22)
While supermassive black holes probably gained most of their mass via accretion
of gas, the galactic nuclei in which they are currently situated are dominated
by stars. This article reviews recent theoretical work on the ...
Tracing black hole mergers through radio lobe morphology
(American Association for the Advancement of Science: Science, 2002-08-23)
Binary supermassive black holes are produced by galactic mergers as the black holes from the two galaxies fall to the center of the merged system and form a bound pair. The two black holes will eventually coalesce in an ...
Dark matter spikes and annihilation radiation from the galactic center
(American Physical Society, 2002-05-13)
The annihilation rate of weakly interacting cold dark matter particles at the galactic center could be greatly enhanced by the growth of a density spike around the central supermassive black hole (SBH). Here we discuss the ...
No supermassive black hole in M33?
(Science, 2001-08-10)
We analyze optical long-slit spectroscopy of the nucleus of M33 obtained from the Space Telescope Imaging Spectrograph aboard the Hubble Space Telescope. Rather than the steep rise expected within the radius of influence ...
Supermassive black holes in active galactic nuclei. I. The Consistency of black hole masses in quiescent and active galaxies
(University of Chicago Press: Astrophysical Journal Letters, 2001-07-10)
We report the first results of a program to measure accurate stellar velocity dispersions in the bulges of the host galaxies of active galactic nuclei (AGNs) for which accurate black hole (BH) masses have been determined ...
Relationship of black holes to bulges
(University of Chicago Press: Astronomical Society of the Pacific, 2001-01)
Supermassive black holes appear to be uniquely associated with galactic bulges. The mean ratio of black hole mass to bulge mass was until recently very uncertain, with ground-based, stellar kinematical data giving a value ...
Black hole demographics from the M•[BH] − σ[sigma] relation
(Monthly Notices of the Royal Astronomical Society, 2001-01)
We analyze a sample of 32 galaxies for which a dynamical estimate of the mass of the hot stellar component, Mbulge, is available. For each of these galaxies, we calculate the mass of the central black hole, M•, using the ...
Regular and chaotic dynamics of triaxial stellar systems
(Astrophysical Journal, 1998-10-20)
We use Laskar’s frequency mapping technique to study the dynamics of triaxial galaxies with central density cusps and nuclear black holes. For ensembles of 104 orbits, we numerically compute the three fundamental ...
Self-consistent gravitational chaos
(Annals of the New York Academy of Sciences, 1998-05)
The motion of stars in the gravitational potential of a triaxial galaxy is generically chaotic. However, the timescale over which the chaos
manifests itself in the orbital motion is a strong function of the degree of ...
Chaos and elliptical galaxies
(Kluwer Academic Publishers, 1996)
Recent results on chaos in triaxial galaxy models are reviewed. Central mass concentrations like those observed in early-type galaxies - either stellar cusps, or massive black holes - render most of the box orbits in a ...