Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998)

Details Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998) Wolf-Rayet and O-star runaways kinematics (Moffat+ 1998)

Apr 1999

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999ycat..33310949m&link_type=abstract

VizieR On-line Data Catalog: J/A+A/331/949. Originally published in: 1998A&A...331..949M

Physics

Stars: Wolf-Rayet, Stars: O, Proper Motions, Radial Velocities

Scientific paper

Reliable systemic radial velocities are almost impossible to secure for Wolf-Rayet stars, difficult for O stars. Therefore, to study the motions - both systematic in the Galaxy and peculiar - of these two related types of hot, luminous star, we have examined the Hipparcos proper motions of some 70 stars of each type. We find that (a) both groups follow Galactic rotation in the same way, (b) both have a similar fraction of ``runaways'', (c) mean kinetic ages based on displacement and motion away from the Galactic plane tend to slightly favour the cluster ejection over the the binary supernova hypothesis for their formation, and (d) those with significant peculiar supersonic motion relative to the ambient ISM, tend to form bow shocks in the direction of the motion. (1 data file).

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