Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988esasp.281a.369b&link_type=abstract
In ESA, A Decade of UV Astronomy with the IUE Satellite, Volume 1 p 369-372 (SEE N89-10682 01-89)
Astronomy and Astrophysics
Astronomy
1
Iue, Line Spectra, Magnesium, Spaceborne Astronomy, Ultraviolet Astronomy, Ultraviolet Spectra, Emission Spectra, Shock Waves, Stellar Atmospheres
Scientific paper
High-dispersion IUE observations obtained to investigate the evolution of the shock structure of the Mira S Carinae (S Car) produced, despite very limited phase coverage, a set of five spectra of the Mg II h and k lines. There is significant emission from both the h and k lines at velocities of -150 km/sec relative to the stellar photosphere. The h-to-k ratio of the Mg II doublet remains below the theoretically predicated values of 2:1 to 1:1, and shows a smooth dependence on the optical phase. Archival studies of other Miras (e.g., R Car) indicate that S Car is not unique in possessing unusual and highly variable Mg II h and k line profiles.
Bookbinder Jay A.
Brown Alexander
Brugel Edward W.
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