RR Lyr variable stars in M32

DOI

Using archival multi-epoch ACS/WFC images in the F606W and F814W filters of a resolved stellar field in Local Group dwarf elliptical galaxy M 32 we have made an accurate Colour-Magnitude Diagram and a careful search for RR Lyr variable stars. We identified 416 bona fide RR Lyr stars over our field of view, and their spatial distribution shows a rising number density towards the centre of M 32. These new observations clearly confirm the tentative result of Fiorentino et al. (2010ApJ...708..817F), on a much smaller field of view, associating an ancient population of RR Lyr variables to M 32. We associate at least 83 RR Lyr stars in our field to M 32.

Cone search capability for table J/A+A/539/A138/table2 (The RR Lyr variable stars we have identified)

Identifier
DOI http://doi.org/10.26093/cds/vizier.35390138
Source https://dc.g-vo.org/rr/q/lp/custom/CDS.VizieR/J/A+A/539/A138
Related Identifier https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/539/A138
Related Identifier http://vizier.cds.unistra.fr/viz-bin/VizieR-2?-source=J/A+A/539/A138
Metadata Access http://dc.g-vo.org/rr/q/pmh/pubreg.xml?verb=GetRecord&metadataPrefix=oai_b2find&identifier=ivo://CDS.VizieR/J/A+A/539/A138
Provenance
Creator Fiorentino G.; Contreras Ramos R.; Tolstoy E.; Clementini G.; Saha A.
Publisher CDS
Publication Year 2012
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; Galactic and extragalactic Astronomy; Natural Sciences; Observational Astronomy; Physics; Stellar Astronomy