Deep FORS1 observations of the double Main Sequence of omega Centauri

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dc.creatorSollima, A.
dc.creatorFerraro, F. R.
dc.creatorBellazzini, M.
dc.creatorOriglia, L.
dc.creatorStraniero, O.
dc.creatorPancino, E.
dc.date2006-09-25
dc.date.accessioned2026-07-07T10:40:14Z
dc.date.available2026-07-07T10:40:14Z
dc.descriptionWe present the results of a deep photometric survey performed with FORS1@VLT aimed at investigating the complex Main Sequence structure of the stellar system omega 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.
dc.description15 pages, 10 figures, accepted for publication by ApJ
dc.identifierhttps://arxiv.org/abs/astro-ph/0609650
dc.identifierhttp://arxiv.org/abs/astro-ph/0609650
dc.identifierAstrophys.J.654:915-922,2007
dc.identifierdoi:10.1086/509711
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/181281
dc.subjectAstrophysics
dc.titleDeep FORS1 observations of the double Main Sequence of omega Centauri
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