Comparison between Predicted and Empirical [FORMULA][F]ΔV[SUP][RM]bump[/RM][/SUP][INF][RM]HB[/RM][/INF][/F][/FORMULA] in Galactic Globular Clusters
Open Access
- 10 June 1999
- journal article
- research article
- Published by American Astronomical Society in The Astrophysical Journal
- Vol. 518 (1) , L49-L52
- https://doi.org/10.1086/312064
Abstract
We present observational estimates of ΔV in a sample of 28 galactic globular clusters (GGCs) observed by the Hubble Space Telescope. The photometric accuracy and the sizable number of stars measured in each cluster allowed us to single out the red giant branch bump both in metal-poor and in metal-rich GGCs. Empirical values are compared with homogeneous theoretical predictions that account for both H- and He-burning phases over a wide range of metal abundances (0.0001<ZV-[M/H] relation toward higher metal contents.Keywords
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