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2001MNRAS.325..257S - Mon. Not. R. Astron. Soc., 325, 257-272 (2001/July-3)
Chemical abundances and winds of massive stars in M31: a B-type supergiant and a WC star in OB 10.
SMARTT S.J., CROWTHER P.A., DUFTON P.L., LENNON D.J., KUDRITZKI R.P., HERRERO A., McCARTHY J.K. and BRESOLIN F.
Abstract (from CDS):
Observations of OB 10-WR1 are analysed using a non-LTE, line-blanketed code, to reveal approximate stellar parameters of logL/L☉∼5.7, T∗∼75kK, v∞∼3000km.s–1, M{dot}/(M☉.yr–1)∼10–4.3 adopting a clumped wind with a filling factor of 10 per cent. Quantitative comparisons are made with the Galactic WC6 star HD 92809 (WR23) revealing that OB 10-WR1 is 0.4 dex more luminous, though it has a much lower C/He ratio (∼0.1 versus 0.3 for HD 92809). Our study represents the first detailed, chemical model atmosphere analysis for either a B-type supergiant or a Wolf-Rayet (WR) star in Andromeda, and shows the potential of how such studies can provide new information on the chemical evolution of galaxies and the evolution of massive stars in the local Universe.
Abstract Copyright: The Royal Astronomical Society
Journal keyword(s): stars: abundances - stars: early-type - stars: winds, outflows - stars: Wolf-Rayet - galaxies: individual: M31
CDS comments: OB 10 =[V64] 10, OB 10-64 =MAC 3-64, OB 10-WR1 =MAC OB 10-1
Simbad objects: 22
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