Other
Scientific paper
Aug 1978
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1978apj...224..143a&link_type=abstract
Astrophysical Journal, Part 1, vol. 224, Aug. 15, 1978, p. 143-148.
Other
35
Binary Stars, Hydrogen Clouds, Interstellar Matter, Lyman Alpha Radiation, Satellite Observation, Ultraviolet Radiation, Abundance, Astronomical Spectroscopy, Magnesium, Oao 3
Scientific paper
Results are reported for high-resolution Copernicus U1 and V2 scans of the bright RS CVn spectroscopic binary HR 1099. The observations reveal strong UV emission lines at L-alpha and Mg II h and k from the stars as well as interstellar H I and D I L-alpha absorption lines and interstellar Mg II h and k absorption in the direction of the binary system. Column densities, bulk velocities, and temperatures are derived for the interstellar features. A comparison of the derived number density of interstellar H I with data for the nearby star Epsilon Eri indicates an inhomogeneous distribution of interstellar hydrogen along the line of sight. The range of values obtained for the D/H ratio is shown to be consistent with results of other studies. A depletion factor of at least 5 with respect to the solar abundance is estimated for the interstellar magnesium.
Anderson Robert C.
Weiler Edward J.
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