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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.
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