Galactic distribution of WR stars |
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| Authors: | Karel A van der Hucht |
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| Institution: | (1) SRON National Institute for Space Research, Sorbonnelaan 2, NL-3584 CA Utrecht, The Netherlands |
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| Abstract: | The recent VIIth Catalogue of Galactic Wolf-Rayet Stars lists 227 Population I WR stars, comprising 127 WN, 87 WC, 10 WN/WC and 3 WO stars. Additional discoveries bring the census
to 234 WR stars. A re-determination of the optical photometric distances and the galactic distribution of WR stars shows in
the solar neighbourhood a projected surface density of 2.7 WR stars per kpc2, a N
WC/N
WN number ratio of 1.3, and a WR binary frequency of 40 %.The galactocentric distance (R
WR) distribution per subtype showsR
WN and R
WC decreasing with WN and WC subtypes.
This revised version was published online in September 2006 with corrections to the Cover Date. |
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| Keywords: | Galaxy: structure Stars: distances Stars: evolution Stars: statistics Stars: Wolf-Rayet |
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