The H-R Diagram of the Open Cluster IC 2602
Abstract
Revised spectral types have been determined for Whiteoak's cluster members of types A0 and earlier. The resulting H-R diagram shows a rather narrow main sequence and a previously known silicon star, HD 92664; the spectrum of the latter shows well-marked absorption lines over the excitation range from C II x4267 to Sr ii X4077. The most remarkable feature of the cluster is the spectrum of its brightest star, 0 Car: lines of N rn are abnormally strong, while C iii is abnormally weak; these characteristics suggest membership in a peculiar spectral category described by Walborn.
- Publication:
-
The Astrophysical Journal
- Pub Date:
- June 1972
- DOI:
- 10.1086/180965
- Bibcode:
- 1972ApJ...174L.131A