Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984a%26as...58..595l&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 58, Dec. 1984, p. 595-599.
Astronomy and Astrophysics
Astrophysics
6
Main Sequence Stars, Open Clusters, Peculiar Stars, A Stars, Comparison, Stellar Rotation, Stellar Spectrophotometry
Scientific paper
The open cluster NGC 6475 has been investigated with respect to possible physical properties common to its members and hence useful for discrimination purposes. As comparison objects the author used two loose clusterings of A-type stars. The investigation includes studies of both intermediate-dispersion spectra (20 Å/mm) and UBV photometry. The general impression is that the high frequency of multiple stars, visual as well as spectroscopic, will constitute a very serious obstacle as far as physical discrimination of cluster members is concerned and to a large extent also in the case of other studies. The CP stars appearing in NGC 6475 have also been subject to some discussion. If continued investigations should prove multiplicity among cluster stars to be considerably less frequent than in the present cases, the attractive idea to find a membership criterion might be fruitful. Otherwise it probably has to be abandoned.
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