Physics
Scientific paper
Dec 1980
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1980apj...242..576f&link_type=abstract
Astrophysical Journal, Part 1, vol. 242, Dec. 1, 1980, p. 576-583.
Physics
47
Absorption Spectra, Interstellar Gas, Line Of Sight, Ultraviolet Spectra, Abundance, Argon, Cloud Physics, Hydrogen, Interstellar Chemistry, Oxygen Spectra, Spectrum Analysis
Scientific paper
The interstellar medium on the Gamma Cas line of sight is studied through the observations of O I, H2, H I, D I, and Ar I absorption features with the Copernicus satellite. By using the velocity structure of the line of sight previously determined through atomic nitrogen, it is demonstrated that these neutrals are located in the same physical regions and that the O I and Ar I abundances could be solar, on the average, relative to N I in all components. The 1066.660 A Ar I line profile is contaminated by an unidentified line, already detected in the spectrum of Zeta Pup. Furthermore, a peculiar behavior of the Ar I abundance in the different components is reported, possibly associated with high-velocity interstellar gas present on the line of sight. It is concluded that the Gamma Cas line of sight could intercept a dense cloud which has been engulfed and disrupted by a shock.
Ferlet Roger
Laurent Camille
Vidal-Madjar Alfred
York Don G.
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