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Chemical Inhomogeneity in Red Giant Branch Stars and RR lyrae variables in NGC 1851: Two Subpopulations in Red Giant Branch

Lee, Jae-Woo; Lee, Jina; Kang, Y W; Lee, Young-Wook; Han, Sang-Il; Joo, Seok-Joo; Rey, Soo-Chang; Yong, David


We investigate the red giant branch (RGB) subpopulations of NGC 1851 using Ca uvby photometry. Our colormagnitude diagrams show that the RGB stars have two subpopulations and the RGB stars in NGC 1851 appear to have distinct elemental abundance patterns with the [Ca/H] abundance. We discuss that the elemental abundance patterns can be explained by the contributions from the asymptotic giant stars, confirming the previous studies by others. The RR Lyrae variables in NGC 1851 appear to have a...[Show more]

CollectionsANU Research Publications
Date published: 2009
Type: Journal article
Source: Astrophysical Journal, The
DOI: 10.1088/0004-637X/695/1/L78


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