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Observations of emission lines in M supergiants

Author
Lambert, D. L.
Published
Aug 1, 1979.
Physical Description
1 electronic document
Online Version

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Summary
Copernicus observations of Mg 2 h and k emission lines from M giants and supergiants are described. Supergiants with extensive circumstellar gas shells show an asymmetric k line. The asymmetry is ascribed to superimposed lines of Fe 1 and Mn 1. The Mg 2 line width fit the Wilson-Bappu relation derived from observations of G and K Stars. Results of correlated ground-based observations include (1) the discovery of K 1 fluorescent emission from the Betelgeuse shell; (2) extimates of the mass-loss rates; and (3) the proposal that silicate dust grains must account for the major fraction of the Si atoms in the Betelgeuse shell.
Other Subject(s)
Collection
NASA Technical Reports Server (NTRS) Collection.
Note
Document ID: 19800019770.
Accession ID: 80N28271.
NASA-CR-163359.
Terms of Use and Reproduction
No Copyright.
View MARC record | catkey: 15721903