Physics
Scientific paper
Aug 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999noao.prop...99m&link_type=abstract
NOAO Proposal ID #1999B-0099
Physics
Scientific paper
Evidence suggests that the binary frequencies of Galactic O-type and WR stars are similar, implying that stellar winds alone are responsible for producing most of the WR stars we know in the Milky Way. What happens, though, at lower metallicities, such as those found in the Magellanic Clouds? Is binarity an important route to becoming a WR star in environments where the mass-loss rates are low because of lack of metals? If so, this is important not only for understanding the evolution of massive stars in differing environments, but also in interpreting the O/WR ratios of WR galaxies, and in understanding how WR stars could be produced in such extremely metal-poor systems as I Zw 18. Here we propose to determine what fraction of ``WR+OB" stars in the Clouds are actually short-period binaries, and to resolve a controvery concerning the binary status of two Galactic WR+OB stars.
Garmany Catharine
Massey Philip
Wallace Debra
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