| Autor: |
SOLLIMA, ANTONIO, FERRARO, FRANCESCO ROSARIO, Bellazzini M., Origlia L., Straniero O., Pancino E. |
| Přispěvatelé: |
Sollima A., Ferraro F. R., Bellazzini M., Origlia L., Straniero O., Pancino E. |
| Jazyk: |
angličtina |
| Rok vydání: |
2007 |
| Popis: |
We present the results of a deep photometric survey performed with the VLT FORS1 aimed at investigating the complex main-sequence structure of the stellar system ? Centauri. We confirm the presence of a double main sequence and identify its blue component (bMS) over a large field of view up to 26' from the cluster center. We found that bMS stars are significantly more concentrated toward the cluster center than the other ``normal'' MS stars. The bMS morphology and its position in the CMD have been used to constrain the helium overabundance required to explain the observed MS morphology. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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