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Variability Survey of ω Centauri in the Near-IR: Period-Luminosity Relations

Published online by Cambridge University Press:  31 March 2017

C. Navarrete ,
M. Catelan ,
R. Contreras Ramos ,
F. Gran ,
J. Alonso-García  and
I. Dékány
C. Navarrete
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile email: [cnavarre@astro.puc.cl, mcatelan@astro.puc.cl] Millennium Institute of Astrophysics, Santiago, Chile
M. Catelan
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile email: [cnavarre@astro.puc.cl, mcatelan@astro.puc.cl] Millennium Institute of Astrophysics, Santiago, Chile
R. Contreras Ramos
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile email: [cnavarre@astro.puc.cl, mcatelan@astro.puc.cl] Millennium Institute of Astrophysics, Santiago, Chile
F. Gran
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile email: [cnavarre@astro.puc.cl, mcatelan@astro.puc.cl] Millennium Institute of Astrophysics, Santiago, Chile
J. Alonso-García
Affiliation:
Millennium Institute of Astrophysics, Santiago, Chile Unidad de Astronomía, Fac. Cs. Básicas, Universidad de Antofagasta, Avda. U. de Antofagasta 02800, Antofagasta, Chile
I. Dékány
Affiliation:
Instituto de Astrofísica, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 782-0436 Macul, Santiago, Chile email: [cnavarre@astro.puc.cl, mcatelan@astro.puc.cl] Millennium Institute of Astrophysics, Santiago, Chile
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Abstract

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ω Centauri is by far the most massive globular star cluster in the Milky Way, and possibly the remnant of a dwarf galaxy. As such, it contains a large number of variable stars of different classes. Here we report on an extensive, wide-field time-series study of ω Cen in the J and KS bands, which has allowed us to study the near-IR period-luminosity relations for different variability classes, including the first such relations for the SX Phoenicis stars.

Keywords

stars: variables: RR Lyraestars: variables: SX Phoenicisstars: variables: generalglobular clusters: individual: ω Centauriinfrared: starssurveysstars: horizontal-branch
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 12 , Symposium S316: Formation, evolution, and survival of massive star clusters , August 2015 , pp. 351 - 352
Copyright
Copyright © International Astronomical Union 2017 

References

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