The fastest runaway Wolf-Rayet star of Population I in the Galaxy, 209 BAC - Evidence for a low mass companion

Details The fastest runaway Wolf-Rayet star of Population I in the Galaxy, 209 BAC - Evidence for a low mass companion The fastest runaway Wolf-Rayet star of Population I in the Galaxy, 209 BAC - Evidence for a low mass companion

Oct 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...114..135m&link_type=abstract

Astronomy and Astrophysics, vol. 114, no. 1, Oct. 1982, p. 135-146. Research supported by the National Research Council of Cana

Astronomy and Astrophysics

Astrophysics

33

Binary Stars, Neutron Stars, Stellar Mass, Wolf-Rayet Stars, Companion Stars, Emission Spectra, Line Spectra, Radial Velocity, Stellar Color, Stellar Spectrophotometry

Scientific paper

A 250-pc distance from the galactic plane and a minimum peculiar space velocity of about 178 km/sec are deduced for the narrow-lined WN8 star 209 BAC, whose peculiar radial velocity component is, at 156 km/sec, the highest of any known WR star. Spectroscopic and photometric observations show the star to have a low mass, and probably compact, companion. It is concluded that 209 BAC was accelerated by the recoil of a supernova explosion, in a binary system in which the present WN8 component was the original secondary while the presumed neutron star companion which was left after the explosion was the original primary. The matter associated with the H II emission nebulosity M1-67 which surrounds 209 BAC may have been ejected during rapid transition from an O-type progenitor of the present WR star, by way of nonconservative mass transfer.

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