H-alpha emission in F-K high luminosity stars

Details H-alpha emission in F-K high luminosity stars H-alpha emission in F-K high luminosity stars

Dec 1981

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1981rmxaa...6..233c&link_type=abstract

(International Astronomical Union, Reunion Regional Latinoamericana de Astronomia, 2nd, Merida, Venezuela, Jan. 19-23, 1981) Rev

Astronomy and Astrophysics

Astronomy

3

Emission Spectra, F Stars, H Alpha Line, K Stars, Stellar Luminosity, Stellar Spectra, Supergiant Stars, Astronomical Catalogs, Late Stars

Scientific paper

The presence and variability of H-alpha emission in very luminous F-K supergiants is investigated, and the lower limit of MV where H-alpha begins to appear in emission is determined. Basic information on the sample of eight stars is presented, including the spectral type, MV, H-alpha activity, and the shape of the H-alpha profile. The emission is variable in intensity and shape for all the stars. The very luminous supergiant HD 217476, which is both a radio star and a binary, shows particularly great variability.

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