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A New Planetary Nebula with Independently Determined Distance and Mass

Published online by Cambridge University Press:  18 September 2017

K.G. Henize  and
A.P. Fairall
K.G. Henize
Affiliation:
NASA Johnson Space Center
A.P. Fairall
Affiliation:
University of Cape Town

Extract

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A low surface brightness planetary nebula with weak ring structure and a diameter 22 arcsec has been discovered in the southwest edge of the open cluster NGC 6067. A calibrated spectrum shows strong He II 4686 (80% Hβ) and an Hα/Hβ ratio of 5.8. The Hα/Hβ ratio yields c = 0.88 which corresponds to Av = 1.88. This is significantly greater than Av for the cluster (1.17) and leads to a distance for the nebula of 3370 pc assuming extinction to be uniform with distance. This leads to a radius of 0.18 pc and a mass of 0.07 solar masses (assuming ε = 0.5).

Type
Abstracts of Contributed Papers
Information
Symposium - International Astronomical Union , Volume 103: Planetary Nebulae , 1983 , pp. 544
Copyright
Copyright © Reidel 1983