A NEW COLOR-MAGNITUDE DIAGRAM FOR 47 TUCANAE: A STATISTICAL ANALYSIS
Journal Article
·
· Astronomical Journal (New York, N.Y. Online)
- Department of Physics, University of Regina, Regina, Saskatchewan S4S 0A2 (Canada)
We present a statistical analysis of color-magnitude diagrams of 47 Tuc derived from original and archival BVI photometry that produces the most probable locus for single stars. After adopting E(B-V) = 0.04, we derive an apparent distance modulus (m - M) {sub V} = 13.375 and achieve good matches to the most probable locus in the [B - V, V], [V - I, I], and [B - I, I] planes with 12 Gyr, [{alpha}/Fe] = +0.3, [Fe/H] = -0.83 isochrones from the Victoria-Regina models. This metallicity is generally lower than recent spectroscopically derived estimates for the cluster, but it is reinforced by the main-sequence match with a sample of subdwarfs.
- OSTI ID:
- 21301546
- Journal Information:
- Astronomical Journal (New York, N.Y. Online), Journal Name: Astronomical Journal (New York, N.Y. Online) Journal Issue: 5 Vol. 138; ISSN 1538-3881
- Country of Publication:
- United States
- Language:
- English
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