Constraints on helium enhancement in the globular cluster m4 (NGC 6121): the horizontal branch test
Recent pieces of evidence have revealed that most, and possibly all, globular star clusters are composed of groups of stars that formed in multiple episodes with different chemical compositions. In this sense, it has also been argued that variations in the initial helium abundance (Y) from one popul...
Gorde:
| Egile Nagusiak: | , , , , |
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| Formatua: | article |
| Hizkuntza: | English |
| Argitaratua: |
American Astronomical Society
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| Gaiak: | |
| Sarrera elektronikoa: | https://repositorio.ufrn.br/jspui/handle/123456789/29026 http://dx.doi.org/10.1088/0004-637X/782/2/85 |
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