Energy input and HI spin temperatures in low pressure regions

Details Energy input and HI spin temperatures in low pressure regions Energy input and HI spin temperatures in low pressure regions

Jul 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990nascp3084..180c&link_type=abstract

In NASA, Ames Research Center, The Interstellar Medium in External Galaxies: Summaries of Contributed Papers p 180-181 (SEE N91-

Other

Absorption Spectra, Disk Galaxies, Emission, Galaxies, Hydrogen, Neutral Gases, Spin Temperature, Continuums, Low Pressure, Sensitivity, Telescopes

Scientific paper

Two recent (unpublished) HI emission/absorption studies carried out with good sensitivity using the Arecibo 21 cm beam are discussed. One study (Colgan, Salpeter and Terzian) looked for high velocity clouds of our own Galaxy in absorption in the directions of 63 of the brightest continuum sources reachable with the Arecibo telescope. HI emission mapping in the neighborhood of these directions was also carried out. The other study (Corbelli and Schneider) looked for absorption along lines of sight to about 50 weaker sources which pass within a few diameters of nearby disk galaxies. Neither study detected any absorption.

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