Deep FORS1 BR photometry of omega Cen

DOI

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.

Cone search capability for table J/ApJ/654/915/fors1 ({omega} Cen BR catalog)

Identifier
DOI http://doi.org/10.26093/cds/vizier.16540915
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/654/915
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/654/915
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/654/915
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/654/915
Provenance
Creator Sollima A.; Ferraro F.R.; Bellazzini M.; Origlia M.; Straniero O.,Pancino E.
Publisher CDS
Publication Year 2007
Rights https://cds.unistra.fr/vizier-org/licences_vizier.html
OpenAccess true
Contact CDS support team <cds-question(at)unistra.fr>
Representation
Resource Type Dataset; AstroObjects
Discipline Astrophysics and Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy