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Hubble space telescope reveals multiple sub-giant branch in eight globular clusters

Piotto, G; Milone, Antonino; Anderson, Jay; Bedin, L R; Bellini, A; Cassisi, S; Marino, Anna; Aparicio, A; Nascimbeni, V


In the last few years many globular clusters (GCs) have revealed complex color-magnitude diagrams, with the presence of multiple main sequences (MSs), broad or multiple sub-giant branches (SGBs) and MS turnoffs, and broad or split red giant branches (RGBs). After a careful correction for differential reddening, high-accuracy photometry with the Hubble Space Telescope (HST) presented in this paper reveals a broadened or even split SGB in five additional Milky Way GCs: NGC362, NGC5286, NGC6656,...[Show more]

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/760/1/39
Access Rights: Open Access


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