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astro-ph2001
Measuring Black Hole Masses Using Ionized Gas Kinematics
Aaron J. Barth, Marc Sarzi, Luis C. Ho +5
We describe techniques for measuring the central masses of galaxies using emission-line kinematics observed with the Hubble Space Telescope. For accurate results, it is necessary t…
astro-ph2001
X-Ray Absorption Associated with High-Velocity UV Absorbers
B. M. Sabra, F. Hamann, J. C. Shields +2
We present Chandra observations of two radio-quiet QSOs, PG 2302+029 and PG 1254+047. PG 2302+029 has an ultra high-velocity UV absorption system -56,000 km/s, while PG 1254+047 is…
astro-ph2001
Calibrating nebular diagnostics of T_* and abundance
M. S. Oey, J. C. Shields, M. A. Dopita +1
We obtained nebular spectroscopy of LMC HII regions having classified stellar populations, thereby strongly constraining the ionization input parameters. Using photoionization mode…