Other
Scientific paper
Jul 1989
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989apj...342..516b&link_type=abstract
Astrophysical Journal, Part 1 (ISSN 0004-637X), vol. 342, July 1, 1989, p. 516-520.
Other
14
Line Shape, Metallicity, Mira Variables, Stellar Envelopes, Ultraviolet Spectroscopy, Emission Spectra, Iue, Magnesium, Radiative Transfer, Resonance Lines
Scientific paper
A series of high-dispersion IUE observations obtained to investigate the evolution of the shock structure of the Mira variable S Carinae have produced (despite limited phase coverage) a set of five exceptionally interesting spectra of the Mg II h and k lines. The two primary findings of these observations are (1) there is significant emission from both the h and k lines at positions corresponding to velocities of -150 km/s relative to the stellar photosphere and (2) the k/h flux ratio of the Mg II doublet remains below the theoretically predicted values which lie in the range 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. Several possible physical processes that may explain these results, including radiative transfer effects in a shocked atmosphere, circumstellar scattering, and circumstellar absorption, are discussed.
Bookbinder Jay A.
Brown Alexander
Brugel Edward W.
No associations
LandOfFree
MG II line profiles of the Mira S Carinae does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with MG II line profiles of the Mira S Carinae, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and MG II line profiles of the Mira S Carinae will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1703646