DDO photometry of giants in the open cluster IC 4651
Creators
- 1. Mount Stromlo and Siding Spring Observatories, Research School of Physical Sciences, Australian National University, Private Bag, Woden Post Office, Australian Capital Territory 2606, Australia
Description
DDO photometry has been obtained for 14 stars in the open cluster IC 4651. The reddening and distance modulus derived from these data are in good agreement with the results obtained from UBV photometry by Eggen. The cluster appears to have a heavy-element abundance slightly less than that of the Hyades, although one giant shows an anomalously strong lambda4216 CN band comparable to those seen in the SMR giants. A comparison is made between this star and CN-enhanced giants in eight other open clusters. It is suggested that the CN-strong phenomenon among open cluster giants is the result of nonstandard stellar evolution, the occurrence of which is supported by the presence of blue stragglers in five out of the eight comparison clusters, as well as in IC 4651 itself
Additional details
Publishing Information
- Journal Title
- Astron. J.
- Journal Volume
- 87
- Journal Issue
- 2
- Series
- Astron. J.
- Journal Page Range
- 360-368
- ISSN
- 0004-6256
INIS
- Country of Publication
- United States
- Country of Input or Organization
- United States
- INIS RN
- 13681962
- Subject category
- S79: ASTROPHYSICS, COSMOLOGY AND ASTRONOMY;
- Descriptors DEI
- CHEMICAL COMPOSITION; CYANOGEN; GIANT STARS; PHOTOMETRY; STAR CLUSTERS
- Descriptors DEC
- STARS