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RR Lyrae stars in omega Centauri: Near-IR properties and period-luminosity relations

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Abstract

Omega Centauri contains a rich harvest of variable stars. Here we report on a deep, wide-field, near-infrared (IR) variability survey for this cluster, carried out using ESO's 4.1m VISTA telescope. Our time-series data includes more than 180 RR Lyrae light curves in both J and Ks, allowing us to derive an unprecedented homogeneous and complete near-IR catalog of RR Lyrae in the field of omega Cen. Near-IR period-luminosity relations are derived and used to determine an updated (pulsational) distance modulus for the cluster
Original languageUndefined/Unknown
JournalCommmunications of the Konkoly Observatory Hungary
StatePublished - May 2016

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