Color excesses, intrinsic colors, and absolute magnitudes of Galactic and Large Magellanic Cloud Wolf-Rayet stars

Details Color excesses, intrinsic colors, and absolute magnitudes of Galactic and Large Magellanic Cloud Wolf-Rayet stars Color excesses, intrinsic colors, and absolute magnitudes of Galactic and Large Magellanic Cloud Wolf-Rayet stars

Aug 1990

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990apjs...73..685v&link_type=abstract

Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 73, Aug. 1990, p. 685-708. Research supported by the Mericos Foun

Astronomy and Astrophysics

Astrophysics

52

Magellanic Clouds, Stellar Color, Stellar Magnitude, Ultraviolet Spectra, Wolf-Rayet Stars, Interstellar Extinction, Iue, Milky Way Galaxy, Spectral Line Width, Stellar Spectra, Stellar Spectrophotometry

Scientific paper

A new method of determining the color excesses of WR stars in the Galaxy and the LMC has been developed and is used to determine the excesses for 44 Galactic and 32 LMC WR stars. The excesses are combined with line-free, narrow-band spectrophotometry to derive intrinsic colors of the WR stars of nearly all spectral subtypes. No correlation of UV spectral index or intrinsic colors with spectral subtype is found for the samples of single WN or WC stars. There is evidence that early WN stars in the LMC have flatter UV continua and redder intrinsic colors than early WN stars in the Galaxy. No separation is found between the values derived for Galactic WC stars and those obtained for LMC WC stars. The intrinsic colors are compared with those calculated from model atmospheres of WR stars and generally good agreement is found. Absolute magnitudes are derived for WR stars in the LMC and for those Galactic WR stars located in clusters and associations for which there are reliable distance estimates.

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