Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1975
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1975a%26a....45..383b&link_type=abstract
Astronomy and Astrophysics, vol. 45, no. 2, Dec. 1975, p. 383-398. In French.
Astronomy and Astrophysics
Astrophysics
11
Hot Stars, O Stars, Stellar Luminosity, Stellar Spectrophotometry, Supergiant Stars, Ubv Spectra, Astronomical Catalogs, Astronomical Photometry, Colorimetry, Main Sequence Stars, Stellar Evolution, Stellar Mass, Stellar Spectra
Scientific paper
Spectrophotometric BCD and photometric UBV data are reported and analyzed for O stars and blue giants that are the brightest members of some multiple system. Spectrophotometric parameters obtained were: the visible gradient phi-rb, the blue gradient phi-b, the ultraviolet gradient phi-uv, the Balmer discontinuity D, and the position of the Balmer discontinuity. Intrinsic colors obtained are bluer than Johnson's scale, but redder than those of corresponding main sequence stars. The spectrophotometric colors of the O stars were fairly dispersed, which is not wholly attributed to the small number of measurements. Significant disagreement was obtained between the colors obtained for the O stars and the generally accepted ones or those given theoretically by the classical ETL or NETL models.
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