Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004aas...20514215p&link_type=abstract
American Astronomical Society Meeting 205, #142.15; Bulletin of the American Astronomical Society, Vol. 36, p.1583
Astronomy and Astrophysics
Astronomy
Scientific paper
We have conducted a sensitive study of the molecular and HI components in gas associated with selected high and intermediate velocity clouds. The Arecibo Telescope was used to measure absorption of bright continuum sources at the HI and H2CO transitions, as well as to map the HI emission of a number of selected clouds. No molecular material was detected in any of the targets, to an rms of ˜8 mK. Absorption by HVCs is uncommon and we show here two HI absorption measurements which were a product of this survey. We find that gas which can be convincingly associated with HVCs shows evidence for a warm and cool component, whereas the high velocity gas found in the periphery of the clouds is generally warm, thermally homogenous and unenriched.
Lebron Mayra
Muller Eduard
Pantoja Carmen
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