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The WR/OB Number Ratio within 2.5 kpc from the Sun

Published online by Cambridge University Press:  04 August 2017

D. Vanbeveren
D. Vanbeveren*
Affiliation:
K.I.H. Group T Campus Blauwput Vuurkruisenlaan 4 3000 Leuven Belgium Vrije Universiteit Brussel Dept. of Physics Pleinlaan 2 1050 Brussels Belgium

Abstract

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Comparing the observed and theoretical HR diagram for massive stars, it is concluded that at least 34 % of the stars within 2.5 kpc from the sun with initial ZAMS mass larger than 35 MO have not yet been detected. It is argued that the number of core helium burning pop I WR stars within 2.5 kpc from the sun may be as low as 26. If the progenitors of WR stars have initial ZAMS masses larger than 35 MO, one then concludes that the observed number ratio (core helium burning pop I WR stars) / (WR progenitors) within 2.5 kpc from the sun ranges between 0.05 and 0.09.

Type
Poster Papers 2
Information
Symposium - International Astronomical Union , Volume 116: Luminous Stars and Associations in Galaxies , 1986 , pp. 237 - 238
Copyright
Copyright © Reidel 1986