Metallicities of RR Lyrae stars in Omega Cen

DOI

We present new spectroscopic metal abundances for 74 RR Lyrae (RRL) stars in {omega} Cen obtained with FLAMES. The well-known metallicity spread is visible among the RRL variables. The metal-intermediate (MI) RRL stars ([Fe/H]~-1.2) are fainter than the bulk of the dominant metal-poor population ([Fe/H]~-1.7), in good agreement with the corresponding zero-age horizontal-branch models with cosmological helium abundance Y=0.246.

Cone search capability for table J/ApJ/640/L43/table1 (Metallicities and properties of the target RRLyrae)

Identifier
DOI http://doi.org/10.26093/cds/vizier.16409043
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/ApJ/640/L43
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/ApJ/640/L43
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/ApJ/640/L43
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/ApJ/640/L43
Provenance
Creator Sollima A.; Borissova J.; Catelan M.; Smith H.A.; Minniti D.; Cacciari C.,Ferraro F.R.
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; Interdisciplinary Astronomy; Natural Sciences; Physics; Stellar Astronomy