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- W55446429 abstract "The recent VIIth Catalogue of Galactic Wolf-Rayet Stars (van der Hucht 2001), lists 227 Population I WR stars, comprising 127 WN, 87 WC, 10 WN/WC and 3 WO stars. Additional discoveries since then bring the census to ≳ 253 WR stars, including ≳ 27 WNL and 13 WCL stars within 50 pc of the Galactic Center. A re-determination of the optical photometric distances and the galactic distribution of WR stars shows in the solar neighbourhood ( d < 3 kpc) a projected surface density of 2.7 WR stars per kpc 2 , a N WC / N WN number ratio of 1.3, and a WR binary frequency of 40%. Compared with other Local Group galaxies, the N WC / N WN number ratio in the solar neighborhood is a factor ~2 above the observed metallicity-dependent trend. This could imply that some 30 galactic WN stars in the d < 3 kpc volume are still hiding. Preliminary results of infrared photometric distance determinations are shown. The galactocentric distance ( R WR ) distribution per subtype shows RWN and RWC decreasing with later WN and WC subtypes. The observed trend is more indicative of WNE → WCE and WNL → WCL subtype evolution than of WNL → WNE and WCL → WCE subtype evolution." @default.
- W55446429 created "2016-06-24" @default.
- W55446429 creator A5015890055 @default.
- W55446429 date "2003-01-01" @default.
- W55446429 modified "2023-09-27" @default.
- W55446429 title "The Galactic distribution of Wolf-Rayet stars: an optical and infrared approach" @default.
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- W55446429 doi "https://doi.org/10.1017/s007418090021262x" @default.
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