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Catalog Service:
RR Lyr variable stars in M32

Short name: J/A+A/539/A138
IVOA Identifier: ivo://CDS.VizieR/J/A+A/539/A138
DOI (Digital Object Identifier): 10.26093/cds/vizier.35390138
Publisher: CDS[+][Pub. ID]
More Info: https://cdsarc.cds.unistra.fr/viz-bin/cat/J/A+A/539/A138
VO Compliance: Level 2: This is a VO-compliant resource.
Status: active
Registered: 2012 Mar 12 15:43:25Z
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Description


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.

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