Astronomy and Astrophysics – Astrophysics
Scientific paper
May 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987apjs...64..241s&link_type=abstract
Astrophysical Journal Supplement Series (ISSN 0067-0049), vol. 64, May 1987, p. 241-267. Research supported by the University of
Astronomy and Astrophysics
Astrophysics
40
Open Clusters, Stellar Evolution, Stellar Luminosity, Supergiant Stars, Color-Magnitude Diagram, Interstellar Extinction, Stellar Envelopes
Scientific paper
This paper describes a program in which Galactic cluster post-AGB candidates were first identified and then analyzed for cluster membership via radial velocities, monitored for possible photometric variations, examined for evidence of mass loss, and classified as completely as possible in terms of their basic stellar parameters. The intrinsically brightest supergiants are found in the youngest clusters. With increasing cluster age, the absolute luminosities attained by the supergiants decline. It appears that the evolutionary tracks of luminosity class II stars are more similar to those of class I than of class III. Only two superluminous giant star candidates are found in open clusters.
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