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The Occurrence of Peculiar Stars in Open Clusters

Published online by Cambridge University Press:  14 August 2015

Helmut A. Abt  and
Hugo Levato
Helmut A. Abt
Affiliation:
Kitt Peak National Observatory
Hugo Levato
Affiliation:
La Plata Observatory

Extract

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We have classified on the MK system a total of 455 stars in 12 open clusters and associations. The classification is based on wide (1.2 mm) spectra of two reciprocal dispersions (39, 128 Å mm−1) obtained with the Kitt Peak 2.1 m and 90 cm reflectors, respectively. The higher dispersion is necessary to show the subtle peculiarities found in some stars. The clusters are the Orion Nebula cluster, Orion OB1 association, Lacerta OB1 association, IC 2602, IC 4665, Pleiades, M39, M34, NGC 2516, NGC 6633, NGC 6475, and Coma; two of these were done with Morgan.

Type
Part IV: HR Diagrams, Clusters
Information
Symposium - International Astronomical Union , Volume 80: The HR Diagram , 1978 , pp. 155 - 156
Copyright
Copyright © Reidel 1978