Variables in metal-rich clusters. IV. NGC 6496

DOI

We present VI-band photometry for stars in the metal-rich globular cluster NGC 6496. Our time-series data were cadenced to search for long-period variables (LPVs) over a span of nearly two years, and our variability search yielded the discovery of 13 new variable stars, of which 6 are LPVs, 2 are suspected LPVs, and 5 are short-period eclipsing binaries. An additional star was found in the ASAS database, and we clarify its type and period. We argue that all of the eclipsing binaries are field stars, while five to six of the LPVs are members of NGC 6496. We compare the period-luminosity distribution of these LPVs with those of LPVs in the Large Magellanic Cloud and 47 Tucanae, and with theoretical pulsation models. We also present a VI color-magnitude diagram, display the evolutionary states of the variables, and match isochrones to determine a reddening of E(B-V)=0.21+/-0.02mag and apparent distance modulus of 15.60+/-0.15mag.

Cone search capability for table J/AJ/149/40/table2 (Mean photometry of NGC 6496)

Cone search capability for table J/AJ/149/40/variables (Variable stars })

Identifier
DOI http://doi.org/10.26093/cds/vizier.51490040
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/AJ/149/40
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/AJ/149/40
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/AJ/149/40
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/AJ/149/40
Provenance
Creator Abbas M.A.; Layden A.C.; Guldenschuh K.A.; Reichart D.E.; Ivarsen K.M.; Haislip J.B.; Nysewander M.C.; LaCluyze A.P.; Welch D.L.
Publisher CDS
Publication Year 2015
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