2 papers
astro-ph2001
Optical emission from high velocity clouds and the ionization sources in the Galactic halo
Benjamin J. Weiner, Stuart N. Vogel, T. B. Williams
Optical emission lines have now been detected from about 20 high velocity clouds. These emission lines -- primarily H-alpha, secondarily [N II] and [S II] -- are very faint and dif…
astro-ph2000
The Bar Pattern Speed in NGC 7079
V. P. Debattista, T. B. Williams
We have used 2D Fabry-Perot absorption-line spectroscopy of the SB0 galaxy NGC 7079 to measure its bar pattern speed, $\om$. As in all previous cases of bar pattern speed measureme…