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Post-Newtonian simulations of super-massive black hole binaries in galactic nuclei
(Wiley-VCH Verlag Berlin: Astronomische Nachrichten, 2008-12)
We present some preliminary results from recent numerical simulations that model the evolution of super-massive black
hole (SMBH) binaries in galactic nuclei. Including the post-Newtonian terms for the binary system and ...
The Black hole mass of NGC 4151: comparison of reverberation mapping and stellar dynamical measurements
(American Astronomical Society - The Astrophysical Journal, 2007-11-20)
We present a stellar dynamical estimate of the black hole (BH) mass in the Seyfert 1
galaxy, NGC 4151. We analyze ground-based spectroscopy as well as imaging data
from the ground and space, and we construct 3-integral ...
Supermassive black hole mass measurements for NGC 1300 and NGC 2748 based on HST [Hubble Space Telescope] emission-line gas kinematics
(Blackwell Publishing: Monthly Notices of the Royal Astronomical Society, 2005-05)
We present Space Telescope Imaging Spectrograph emission-line spectra of the central regions of the spiral galaxies NGC 1300 and NGC 2748. From the derived kinematics of the nuclear gas we have found evidence for central ...
The supermassive black hole in the Seyfert 2 galaxy NGC 5252
(EDP Sciences: Astronomy & Astrophysics, 2005-02)
We present results from HST/STIS long-slit spectroscopy of the gas motions in the nuclear region of the Seyfert 2 galaxy NGC 5252. The observed velocity field is consistent with gas in regular rotation with superposed ...
The host galaxies of luminous quasars
(Blackwell Publishing, 2004-11)
We present the results of a deep HST/WFPC2 imaging study of 17 quasars at z~=0.4, designed to determine the properties of their host galaxies. The sample consists of quasars with absolute magnitudes in the range −24 ≥ MV ...
Quasars, their host galaxies, and their central black holes
(Blackwell Publishing, 2003-04-09)
We present the final results from our deep HST imaging study of the host galaxies of radio-quiet quasars (RQQs), radio-loud quasars (RLQs) and radio galaxies (RGs). We describe and analyze new WFPC2 R-band observations for ...
HST [Hubble Space Telescope] observations of NGC 6240
(University of Chicago Press: Astronomical Society of the Pacific, 2001-05)
WFPC2 images and STIS spectroscopic observations are presented of the double nucleus in the merger system NGC 6240. We find that: (a) the kinematics of the ionized gas is similar to that of the molecular gas, despite a ...