On the physical conditions in the 'high-velocity' cloud near Zeta ORI

Details On the physical conditions in the 'high-velocity' cloud near Zeta ORI On the physical conditions in the 'high-velocity' cloud near Zeta ORI

Jan 1977

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1977a%26a....54..425d&link_type=abstract

Astronomy and Astrophysics, vol. 54, no. 2, Jan. 1977, p. 425-433. Research supported by the Lockheed Independent Research Prog

Astronomy and Astrophysics

Astronomy

15

Emission Spectra, Interstellar Matter, Oao 3, Spaceborne Astronomy, Abundance, Space Density, Temperature Distribution

Scientific paper

The problem of the 'high-velocity' clouds is rediscussed. Recent OAO-C Copernicus observations of lines of four atoms and ions have been used to estimate the density and temperature in both the 'high-velocity' and 'normal' interstellar clouds in the line-of-sight to Zeta Ori. The temperature and densities in the normal cloud are similar to previous results for interstellar clouds, yielding temperatures of the order of 100 K and compositions underabundant relative to the sun by factors of 3 or more. The high-velocity cloud, however, is warmer (at least 1000 K) and appears to have a normal solar abundance.

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