Citations Only: Recent submissions
Now showing items 961-980 of 990
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High-resolution radio observations of Seyfert galaxies in the extended 12-micron sample - I. The Observations
(Blackwell Publishing, 2000-05)We present 8.4 GHz VLA A–configuration observations of 87 sources from the mid–infrared–selected AGN sample of Rush et al. (1993). These 0.25 arcsec resolution observations allow elongated radio structures tens of parsecs ... -
High-resolution radio observations of Seyfert galaxies in the extended 12-micron sample - II. The Properties of compact radio components
(Blackwell Publishing, 2001-08)We discuss the properties of compact nuclear radio components in Seyfert galaxies from the extended 12 µm AGN sample of Rush et al. (1993). Our main results can be summarised as follows. Type 1 and type 2 Seyferts produce ... -
The Parsec-scale radio structure of NGC 1068 and the nature of the nuclear radio source
(American Astronomical Society, 2004-10-01)We present sensitive, multifrequency Very Long Baseline Array (VLBA2) images of the nuclear radio sources of NGC 1068. At 5 GHz and 8.4 GHz, the radio continuum source S1, argued to mark the location of the hidden active ... -
BIMA millimeter-wave observations of the core-jet and molecular gas in the FR I radio galaxy NGC 3801
(Astrophysical Journal, 2005-08-20)We present BIMA 3 mm observations of the radio continuum source and the molecular gas disk in the radio loud Fanaroff & Riley Type I (FR I) galaxy NGC 3801. We have detected a continuum source in the nucleus and determined ... -
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 ... -
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 ... -
Galaxy cores as relics of black hole mergers
(Blackwell Pubilshing, 2002-04)We investigate the hypothesis that the cores of elliptical galaxies and bulges are created from the binding energy liberated by the coalescence of supermassive binary black holes during galaxy mergers. Assuming that the ... -
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 ... -
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 ... -
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 ...