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Hubble Space Telescope observations of an outer field in omega Centauri: A definitive helium abundance

King, I R; Bedin, L R; Cassisi, S; Milone, Antonino; Bellini, A; Piotto, G; Anderson, Jay; Pietrinferni, A; Cordier, D

Description

We revisit the problem of the split main sequence (MS) of the globular cluster ω Centauri, and report the results of two-epoch Hubble Space Telescope observations of an outer field, for which proper motions give us a pure sample of cluster members, and a

CollectionsANU Research Publications
Date published: 2012
Type: Journal article
URI: http://hdl.handle.net/1885/78134
Source: Astronomical Journal
DOI: 10.1088/0004-6256/144/1/5

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