Astronomy and Astrophysics – Astrophysics
Scientific paper
Dec 1987
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1987a%26as...71..431m&link_type=abstract
Astronomy and Astrophysics Supplement Series (ISSN 0365-0138), vol. 71, no. 3, Dec. 1987, p. 431-440.
Astronomy and Astrophysics
Astrophysics
5
Electrophotometry, Open Clusters, Peculiar Stars, Main Sequence Stars, Star Distribution, Stellar Composition, Stellar Evolution, Stellar Motions
Scientific paper
Δa-photometry was carried out for 164 stars in NGC 3532 (the most populous cluster studied so far in this series) and 27 stars in NGC 5662. Surprisingly, only one mildly peculiar star (Koelbloed 232) was identified this way among the roughly hundred cluster members of NGC 3532. Three photometrically peculiar objects were found among the approximately 60 field stars in the cluster area. This is about the average frequency of CP2-stars, in contrast to the pronounced shortage of CP2-stars in the rather old cluster NGC 3532. In NGC 5662 two CP2-objects, MV6 and MV10, were identified. MV6, however, is a probable non-member based on its proper motion data. As in some previous cases again a negative Δa-object was found with reported Be-characteristics (NGC 5662-MV29).
Maitzen Hans Michael
Schneider Harald
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