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The Galactic Distribution of Wolf-Rayet Stars∗

Published online by Cambridge University Press:  14 August 2015

B. Hidayat ,
K. Supelli  and
K.A. van der Hucht
B. Hidayat
Affiliation:
1Observatorium Bosscha, Institut Teknology Bandung Indonesia
K. Supelli
Affiliation:
1Observatorium Bosscha, Institut Teknology Bandung Indonesia
K.A. van der Hucht
Affiliation:
2Laboratorium voor Ruimte-onderzoek, Rijksuniversiteit Utrecht, Nederland

Abstract

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On the basis of the most recent compilation of narrow-band photometry and absolute visual magnitudes of Wolf-Rayet stars, and adopting a normal interstellar extinction law in all directions, the galactic distribution of 132 of the 159 known galactic WR stars is presented and discussed.

The spiral structure is found to be more clearly pronounced than in earlier studies. Furthermore we find an indication of two spiral arms at r=4 and 6 kpc. There appears to be an asymmetry of the z-distribution of single stars with respect to galactic longitude.

The location of the WC8.5 and WC9 stars between 4.5 and 9 kpc from the galactic center is discussed in the context of Maeder's red supergiant to WR star scenario.

Type
SESSION 1 — THE WOLF-RAYET PHENOMENON
Information
Symposium - International Astronomical Union , Volume 99: Wolf-Rayet Stars: Observations, Physics, Evolution , 1982 , pp. 27 - 40
Copyright
Copyright © Reidel 1982 

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