Astronomy & Astrophysics (A&A)

A&A, 464 3 (2007) 939-951

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Na-O anticorrelation and horizontal branches - IV. Detection of He-rich and He-poor stellar populations in the globular cluster NGC 6218

E. Carretta, A. Bragaglia, R. G. Gratton, G. Catanzaro, F. Leone, E. Sabbi, S. Cassisi, R. Claudi, F. D'Antona, P. François et al. (2 more)

A&A, 464 3 (2007) 939-951

Published online: 11 January 2007

DOI: 10.1051/0004-6361:20065730

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