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Spectroscopy and Photometry of the Southern R Stars

Published online by Cambridge University Press:  12 April 2016

T. Lloyd Evans
T. Lloyd Evans*
Affiliation:
South African Astronomical Observatory, Observatory 7935, South Africa

Extract

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UBVRI photometry and 1-2Å resolution spectra have been used to classify 85 stars listed as type R by various authors. Some are N stars, including a few characterized by strong NaD, weak C2 and enhanced 13C which are distinct from the cooler counterparts of the strong-banded 13C rich stars which are the most numerous of the R stars. The latter are also distinguished from non- C rich stars by having redder V-I at given B-V in the bifurcated distribution in the B-V, V-I diagram.

Type
1. Properties and Kinematics of the Peculiar Red Giant Stars
Information
International Astronomical Union Colloquium , Volume 106: Evolution of Peculiar Red Giant Stars , 1989 , pp. 53
Copyright
Copyright © Cambridge University Press 1989