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Updated census of RR Lyrae stars in the globular cluster ω Centauri (NGC 5139)
(EDP Sciences, 2015-05)
Aims. ω Centauri (NGC 5139) contains many variable stars of different types and, in particular, more than one hundred RR Lyrae stars. This enabled gathering a homogeneous sample (in terms of instrument, image quality, and ...
Near-IR period-luminosity relations for pulsating stars in ω Centauri (NGC 5139)
(Astronomy and Astrophysics, 2017-08)
Aims. The globular cluster ω Centauri (NGC 5139) hosts hundreds of pulsating variable stars of different types, thus representing a treasure trove for studies of their corresponding period-luminosity (PL) relations. Our ...
On the RR Lyrae Stars in Globulars. V. the Complete Near-infrared (JHK s) Census of ω Centauri RR Lyrae Variables
(nstitute of Physics Publishing, 2018-03)
We present a new complete near-infrared (NIR, JHK s) census of RR Lyrae stars (RRLs) in the globular ω Cen (NGC 5139). We collected 15,472 JHK s images with 4-8 m class telescopes over 15 years (2000-2015) covering a sky ...