Astronomy and Astrophysics – Astronomy
Scientific paper
Sep 1983
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1983a%26a...126..192z&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 126, no. 1, Sept. 1983, p. 192-204.
Astronomy and Astrophysics
Astronomy
14
B Stars, Far Ultraviolet Radiation, Satellite Observation, Stellar Color, Ultraviolet Astronomy, Balmer Series, Early Stars, Spectral Correlation, Stellar Rotation, Stellar Spectrophotometry, Td-1 Satellite
Scientific paper
A far-UV color index, G, which is free of interstellar reddening effects is applied to TD-1 satellite observations of B and Be stars listed in the catalogs of Jamar et al. (1976) and Macau-Hercot et al. (1978). The expressions defining G(in terms of the wavelengths 146, 235, and 274 nm) and the S70 index of spectral type are set forth. Tables of mean and individual-star G and S70 indices and plots of G versus S70, Delta-G versus spectral type, Delta-G versus H-alpha and H-beta intensity, and G versus V(sin i) are presented and discussed. The Be stars are classified as strong if they show strong Balmer emission, some Paschen and Fe II emission, and IR excess; otherwise they are 'weak'. Weak Be stars are found to have G similar to that of B stars, while G in strong Be stars is either much more negative or much less negative than in the B stars. No correlation is found between G and V(sin i) for either B or Be stars.
Briot Danielle
Divan Lucienne
Zorec Jean
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