Abstract
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 L B ≃ 2 × 108 L ⊙. From the work of Oort it is estimated that the galactic halo has a mass of at least 6 ×109M⊙ so that M/L > 30 for the galactic halo.
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© 1973 D. Reidel Publishing Company, Dordrecht, Holland
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Van Den Bergh, S. (1973). Planetary Nebulae, Globular Clusters and the Galactic Halo. In: Fernie, J.D. (eds) Variable Stars in Globular Clusters and in Related Systems. Astrophysics and Space Science Library, vol 36. Springer, Dordrecht. https://doi.org/10.1007/978-94-010-2590-4_4
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DOI: https://doi.org/10.1007/978-94-010-2590-4_4
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