The cepheid SV Crucis and the cluster Ruprecht 97.
UBV photometry of Ruprecht 97 is consistent with the assumption that this sparse cluster has (m - M)v = 13.7 + 0.3, = 0.21 + 0.02, and an age T 1 x l0 yr. Cluster membership of SV Cru is ruled out because (1) the cluster is much older than this 7 day Cepheid, (2) the Cepheid is much more distant and more heavily reddened than the cluster, and (3) significant numbers of cluster stars are not observed near the Cepheid, which is located 110" from the cluster center. The period of the Cepheid was found to be 7d.0044 + 0d.0001. Subject headings: clusters: open - stars: Cepheids
The Astrophysical Journal
- Pub Date:
- September 1976