AAS 197, January 2001
Session 66. When the Universe was Mostly Gas
Oral, Tuesday, January 9, 2001, 1:30-3:00pm, Royal Palm 3/4

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[66.03] A Sample of High Velocity Clouds in z ~ 1 Galaxies: What Can They Be?

C. W. Churchill (Penn State)

The debate as to the nature of Galactic high velocity clouds (HVCs) is on. Are they infalling, tidally stripped, or fountain related and located within a few kpc of the Galaxy, or are they remnants of the Local Group formation and distributed ubiquitously over a few Mpc volume in the Local Group? Are they chemically enriched, and if so what star formation histories are suggested?

The kinematics of absorbing gas in z~1 galaxies are characterized by the presence of very small, optically thin, metal enriched "high velocity" clouds. I will describe their statistical properties and discuss implications and comparisons with the Local Group / Galaxy population of HVCs.

If you would like more information about this abstract, please follow the link to http://www.astro.psu.edu/users/cwc/aas01.html. This link was provided by the author. When you follow it, you will leave the Web site for this meeting; to return, you should use the Back comand on your browser.

The author(s) of this abstract have provided an email address for comments about the abstract: cwc@astro.psu.edu

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