Photometric binaries in 50 globular clusters

Bibcode
2008MmSAI..79..623M
Milone, A. P.; Piotto, G.; Bedin, L. R.; Sarajedini, A.
Bibliographical reference

Memorie della Società Astronomica Italiana, v.79, p.623 (2008)

Advertised on:
0
2008
Number of authors
4
IAC number of authors
0
Citations
47
Refereed citations
42
Description
The HST/ACS Survey of Galactic globular clusters (GGCs) is a HST Treasury project aimed at obtaining high precision photometry in a large sample of globular clusters. The homogeneous photometric catalogs that has been obtained from these data by Anderson et al. (2008) represents a golden mine for a lot of astrophysical studies. In this paper we used the catalog to analyze the properties of MS-MS binary systems from a sample of fifty GGCs. We measured the fraction of binaries (divided in different groups), studied their radial distribution and constrained the mass ratio distribution. We investigated possible relations between the fraction of binaries and the main parameters of their host GGCs. We found a significant anti-correlation between the binary fraction in a cluster and its absolute luminosity (mass).
Type
Non-refereed
Stellar dynamics
Methods
Techniques

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