Neutral hydrogen absorption by high-velocity clouds

Details Neutral hydrogen absorption by high-velocity clouds Neutral hydrogen absorption by high-velocity clouds

Apr 1978

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...221l..95p&link_type=abstract

Astrophysical Journal, Part 2 - Letters to the Editor, vol. 221, Apr. 15, 1978, p. L95-L98.

Astronomy and Astrophysics

Astronomy

15

Absorption Spectra, Hydrogen Clouds, Interstellar Gas, Astronomical Spectroscopy, Emission Spectra, Radio Sources (Astronomy)

Scientific paper

Neutral hydrogen emission-absorption observations are reported for some high-velocity clouds at moderately low galactic latitudes. Absorption features have been detected in the direction of the background source 3C 123 at -57 and -73 km/s, and possibly in the direction of 4C 33.48 at -128 km/s. From these observations a temperature range from about 75 K to a few hundred K is suggested. Some H I spatial variations on a small scale (at most approximately 4 arcmin) have been found.

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