Luminosities and Rates of Mass Loss of Some Galactic Wolf-Rayet Stars

Details Luminosities and Rates of Mass Loss of Some Galactic Wolf-Rayet Stars Luminosities and Rates of Mass Loss of Some Galactic Wolf-Rayet Stars

Dec 1989

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1989pkas....4...16w&link_type=abstract

Publications of the Korean Astronomical Society, vol.4, no.1, p.16-30

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Scientific paper

We present recent data of absolute measurements of flux emitted in the visible continua of some galactic Wolf-Rayet stars, carried out by means of a two-channel scanner built up cooperatively by the Observatoire de Lyon and the laboratoire d'Astronomie Spatiale. Our measurements lead to the determination of stellar angular diameters which enable us to compute log L*/Lo and to locate the WR stars in the HR diagram: The WR stars are cooler than the zero age main sequence (ZAMS) and the WN7, WN8 types appear more luminous than other subclasses. The stellar wind terminal velocities, Vinf, deduced from the empirical relation of the effective temperatures by Underhill(1983) and Vinf adopted from the world Willis(1982) show about 2000 kms/s. We derived the rate of mass loss for the program stars from the formula, Mdot = e(Teff) L/(Vinf x c) by using the obtained effective temperatures, luminosities and Vinf in this work. Their values range from Mdot = 1.4e-5 to Mdot = 5.8e-5 Mo/yr.

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