Pierce Prize Lecture: High Velocity Clouds: Cosmological and Galactic Weather

Details Pierce Prize Lecture: High Velocity Clouds: Cosmological and Galactic Weather Pierce Prize Lecture: High Velocity Clouds: Cosmological and Galactic Weather

Dec 2001

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2001aas...19911301s&link_type=abstract

American Astronomical Society, 199th AAS Meeting, #113.01; Bulletin of the American Astronomical Society, Vol. 33, p.1478

Astronomy and Astrophysics

Astronomy

4

Scientific paper

The Milky Way and its surrounding environs contain gas moving at high velocities with respect to the Sun. For the past half century, most of the information available for these high velocity clouds (HVCs) has come from H I 21cm surveys. Improvements in these surveys have recently led to the idea that some of the high velocity H I clouds may be located outside the Milky Way within the Local Group. Such a hypothesis is testable by various means, but the neutral gas content of the clouds tells only half of a much more complex story. In this talk I will present new information about the ionized gas within HVCs, their impact on the gaseous atmosphere of the Galaxy, and their relevance to the cosmic web of hot gas that may contain a significant fraction of the baryonic material in the low-redshift universe.

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