Na-O anticorrelation and horizontal branches. IV. Detection of He-rich and He-poor stellar populations in the globular cluster NGC 6218
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| Description | scientific article published in Astronomy and Astrophysics |
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author: Francesca D'antona Eugenio Carretta Raffaele Gratton Riccardo Claudi Giovanni Catanzaro Patrick Francois Giampaolo Piotto Santi Cassisi |
| Publication date | January 11, 2007 |
| Language | English |
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