Astronomy and Astrophysics – Astrophysics
Scientific paper
2004-05-07
Astronomy and Astrophysics
Astrophysics
11 pages, 8 figures
Scientific paper
An analysis of available Galactic globular cluster data on metallicity, ages, the distribution of stars on the horizontal branch and the distribution of the periods of RR0 Lyr variables showed that: 1. The latter two characteristics can be used for determining the Oosterhoff type. 2. The metallicities of the observed OoI and OoII clusters overlap in a narrow interval -1.65$<$[Fe/H]$<$1.52. 3. The OoII clusters are characterized by R-B$<$0, a statistically significant relation (r=0.97) between the relative number of B(BS) and V(VS) stars on the horizontal branch. 4. The OoI clusters divide into two groups: R-B$<$0 and R-B$>$0 with a relation between B and R (r=0.90). The former clusters do not show a relation between VS and RS stars and the latter a relation between VS and BS stars on the horizontal branch. 5. The oldest clusters are characterized by BS close to 1 and the youngest by R close to 1.
No associations
LandOfFree
Globular Clusters and Horizontal Branch does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Globular Clusters and Horizontal Branch, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Globular Clusters and Horizontal Branch will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-469756