Massive stars in galaxies (The 1990 George DARWIN Lecture)

Details Massive stars in galaxies (The 1990 George DARWIN Lecture) Massive stars in galaxies (The 1990 George DARWIN Lecture)

Sep 1991

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1991qjras..32..217m&link_type=abstract

Royal Astronomical Society, Quarterly Journal (ISSN 0035-8738), vol. 32, Sept. 1991, p. 217-231.

Astronomy and Astrophysics

Astronomy

17

Massive Stars, Stellar Evolution, Stellar Mass, Wolf-Rayet Stars, Evaporation, Galactic Evolution, Metallicity, Supernovae

Scientific paper

Recent observational evidence regarding the evolution of massive stars is reviewed in terms of its implications on understanding the stellar sequence. The evidence includes IUE observations of high evaporation levels in massive star evolution, observations of Wolf-Rayet (WR) stars as stellar cores, and the interpretation of Wolf-Rayet galaxies as starbursts. Also considered are: the differences between the numbers of O-stars, blue and red supergiants, and WR stars in galaxies characterized by star formation; the qualitative differences between supernovae progenitors in galaxies of different Z-values; and the dependence of chemical yields on the initial value of Z and mass-loss rates. The metallicity Z is found to be a highly significant variable regarding the evolution of massive stars, and the manner in which the stars explode is also linked to this denominator.

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