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The ACS survey of galactic globular clusters. IX. Horizontal branch morphology and the second parameter phenomenon

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Dotter, Aaron; Sarajedini, A; Anderson, Jay; Aparicio, A; Bedin, L R; Chaboyer, Brian; Majewski, S; Marin-Franch, A; Milone, Antonino; Paust, Nathaniel; Piotto, G; Reid, I Neill

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The horizontal branch (HB) morphology of globular clusters (GCs) is most strongly influenced by metallicity. The second parameter phenomenon, first described in the 1960s, acknowledges that metallicity alone is not enough to describe the HB morphology of

CollectionsANU Research Publications
Date published: 2010
Type: Journal article
URI: http://hdl.handle.net/1885/79058
Source: Astrophysical Journal Letters
DOI: 10.1088/0004-637X/708/1/698

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