CCD Photometry of the Globular Cluster NGC 288
Abstract
Observations obtained in 1983 with a CCD at the University of Hawaii 2.2-m Mauna Kea telescope are used to produce a BV color-magnitude diagram for main-sequence stars in NGC 288. Results indicate an Fe/H abundance ratio of -1.30 + or - 0.10 dex. If NGC 288 has a reddening of E(B-V) = 0.03, a true distance modulus of 14.46 + or - 0.2 is obtained. It is found from a comparison of the present color-magnitude diagram to theoretical isochrones that the data are not in agreement with the models for the assumed parameters. Abundance variations other than the Fe/H abundance ratio may explain the discrepancy between the main-sequence turnoff of NCD 288 and that of NGC 362.
- Publication:
-
The Astronomical Journal
- Pub Date:
- November 1987
- DOI:
- 10.1086/114556
- Bibcode:
- 1987AJ.....94.1185P
- Keywords:
-
- Astronomical Photometry;
- Color-Magnitude Diagram;
- Globular Clusters;
- Main Sequence Stars;
- Interstellar Extinction;
- Metallicity;
- Tables (Data);
- Astrophysics;
- CLUSTERS: GLOBULAR