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A Study of the Direct-Fitting Method for Measurement of Galaxy Velocity Dispersions
A. J. Barth, L. C. Ho, W. L. W. Sargent
We have measured the central stellar velocity dispersions of 33 nearby spiral and elliptical galaxies, using a straightforward template-fitting algorithm operating in the pixel dom…
The Black Hole Masses and Host Galaxies of BL Lac Objects
A. J. Barth, L. C. Ho, W. L. W. Sargent
We have measured the central stellar velocity dispersion in the host galaxies of 11 BL Lac objects with redshifts z <= 0.125. The range of velocity dispersions, 170-370 km/s, is si…
Characterizing the Warm-Hot IGM at High Redshift: A High Resolution Survey for O VI at z = 2.5
Robert A. Simcoe, Wallace L. W. Sargent, Michael Rauch
We describe a survey for OVI absorption in the spectra of 5 high redshift quasars (2.2 < z < 2.8). We identify 12 cosmological systems, and 6 systems that are either ejected from t…
Small Scale Structure at High Redshift: IV. Low Ionization Gas Intersecting Three Lines of Sight to Q2237+0305
M. Rauch, W. L. W. Sargent, T. A. Barlow +1
We have obtained Keck HIRES spectra of three images of the gravitationally lensed QSO 2237+0305 to study low ionization absorption systems and their differences in terms of project…
Stellar Velocity Dispersion and Black Hole Mass in the Blazar Markarian 501
A. J. Barth, L. C. Ho, W. L. W. Sargent
The recently discovered correlation between black hole mass and stellar velocity dispersion provides a new method to determine the masses of black holes in active galaxies. We have…