Other
Scientific paper
Jul 1979
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1979mnras.188...19t&link_type=abstract
Monthly Notices of the Royal Astronomical Society, vol. 188, July 1979, p. 19-24. Research supported by the Australian Research
Other
13
Absorption Spectra, B Stars, Oxygen Atoms, Oxygen Spectra, Stellar Luminosity, X Ray Sources, Energy Spectra, Light Emission, Shell Stars, Spectral Energy Distribution
Scientific paper
The existence of a correlation between the absorption equivalent width of the O I absorption triplet at 7773 A and stellar luminosity is confirmed by using a sample of 14 B1-B5 stars. This correlation is employed to investigate the luminosities of six X-ray source counterparts of known spectral type. It is shown that measurement of the equivalent width of the O I 7773-A absorption feature offers a valuable technique for determining a star's luminosity class, that this technique requires only knowledge of a star's spectral type and is applicable to types in the range from B1 to about G7, and that X-ray luminosities and source distances may be obtained independently of other methods. The identification of the star MMV (= 4U 1258-61 = 2S 1258-613) as a shell star is confirmed.
Morton Donald C.
Murdin P. G.
Thomas Rajat M.
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