Astronomy and Astrophysics – Astronomy
Scientific paper
Jan 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983ap%26ss..89..173b&link_type=abstract
Astrophysics and Space Science (ISSN 0004-640X), vol. 89, no. 1, Jan. 1983, p. 173-176.
Astronomy and Astrophysics
Astronomy
1
Hydrogen Clouds, Interstellar Gas, Milky Way Galaxy, X Ray Astronomy, Coronas, Halos, Line Of Sight, Shock Waves, Velocity Measurement
Scientific paper
It is noted that high-latitude, high-velocity clouds move at speeds from about 30 km/s to more than 250 km/s relative to the local standard of rest (Verschuur, 1975) and that they are believed to exist in the galactic halo where the pressure of the hot corona contains them (Spitzer, 1956). The existence of a hot corona has recently been confirmed by observations made with the International Ultraviolet Explorer (Savage and de Boer, 1979). The suggestion is made that observations of the soft X-ray emission in the directions of the clouds would complement the existing 21-cm observations and could be used to derive the clouds' velocities transverse to their lines of sight. It is pointed out that the detection of diffuse soft X-ray emission around a high velocity cloud would be an important indicator of high depletion in the corona gas.
Bone David A.
Hartquist Thomas W.
Sanford P.
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