The double sub-giant branch of NGC 6656 (M 22): a chemical characterization⋆⋆

Author: Marino A. F.   Milone A. P.   Sneden C.   Bergemann M.   Kraft R. P.   Wallerstein G.   Cassisi S.   Aparicio A.   Asplund M.   Bedin R. L.   Hilker M.   Lind K.   Momany Y.   Piotto G.   Roederer I. U.   Stetson P. B.   Zoccali M.  

Publisher: Edp Sciences

E-ISSN: 1432-0746|541|issue|A15-A15

ISSN: 0004-6361

Source: Astronomy & Astrophysics, Vol.541, Iss.issue, 2012-04, pp. : A15-A15

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