H-alpha and near-infrared spectra of late-type Be and A F-type shell stars

Details H-alpha and near-infrared spectra of late-type Be and A F-type shell stars H-alpha and near-infrared spectra of late-type Be and A F-type shell stars

Sep 1986

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1986pasp...98..867s&link_type=abstract

Astronomical Society of the Pacific, Publications (ISSN 0004-6280), vol. 98, Sept. 1986, p. 867-871.

Astronomy and Astrophysics

Astronomy

22

B Stars, F Stars, H Alpha Line, Infrared Spectra, Shell Stars, Stellar Envelopes, Stellar Spectra, A Stars, Absorption Spectra, Late Stars, Near Infrared Radiation, Oxygen Spectra

Scientific paper

Profiles of H-alpha and the near-infrared lines of O I and Ca II in the spectra of a number of bright Be stars of later type, and A - F shell stars were obtained with a CCD detector at the Kitt Peak coude feed telescope in November 1984. The lines studied show sharp absorption cores in the shell stars, as expected, and there appears to be a smooth transition from the late-type Be stars to the A-type shell stars. However, the H-alpha line changes from emission to absorption rather abruptly from the late Be stars to the early A-type shell stars.

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