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Planetary Nebulae, Globular Clusters and the Galactic Halo

Published online by Cambridge University Press:  12 April 2016

Sidney Van Den Bergh
Sidney Van Den Bergh*
Affiliation:
David Dunlap Observatory, University of Toronto, Richmond Hill, Ontario, Canada

Abstract

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Planetary nebulae are used as a tracer for halo Population II stars. A comparison of the number of planetary nebulae in the galactic pole caps (|b| ≥ 45°) with the number of planetaries in globular clusters suggests that (to within a factor of 2 or 3) the galactic halo has a luminosity LB ⋍ 2 × 108L⊙. From the work of Oort it is estimated that the galactic halo has a mass of at least so that for the galactic halo.

Type
Part I / General Problems of Variables in Population II Systems
Information
International Astronomical Union Colloquium , Volume 21: Variable Stars in Globular Clusters and in Related Systems , August 1973 , pp. 26 - 28
Copyright
Copyright © Reidel 1973

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