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Luminosity and mass functions of the three main sequences of the globular cluster NGC 2808

Milone, Antonino; Piotto, G; Bedin, L R; Cassisi, S; Anderson, Jay; Marino, Anna; Pietrinferni, A; Aparcio, A


High-precision HST photometry has revealed that the globular cluster (GC) NGC 2808 hosts a triple main sequence (MS) corresponding to three stellar populations with different helium abundances. We carried out photometry on ACS/WFC HST images of NGC 2808 with the main purpose of measuring the luminosity function (LF) of stars in the three different MSs, and the binary fraction in the cluster. We used isochrones to transform the observed LFs into mass functions (MFs). We estimate that the...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Astronomy and Astrophysics
DOI: 10.1051/0004-6361/201116539
Access Rights: Open Access


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