TY - GEN
T1 - Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations
AU - Navarrete, Camila
AU - Catelan, Márcio
AU - Contreras Ramos, Rodrigo
AU - Alonso-García, Javier
AU - Gran, Felipe
AU - Dékány, István
AU - Minniti, Dante
N1 - Funding Information:
Acknowledgments: Support for this project is provided by the Ministry for the Economy, Development, and Tourism’s Millennium Science Initiative through grant IC 120009, awarded to the Millennium Institute of Astrophysics (MAS); by the Basal Center for Astrophysics and Associated Technologies (CATA) through grant PFB-06/2007; by CONICYT’s PCI program through grant DPI20140066; and by FONDECYT grants #1141141 and #1171273 (C.N., M.C.), #1130196 (D.M.), #1150345 (F.G.), #3130320 (R.C.R.), and #11150916 (J.A.-G.). C.N. acknowledges additional support from CONICYT-PCHA/Doctorado Nacional 2015-21151643.
PY - 2017/9/8
Y1 - 2017/9/8
N2 - ω Centauri (NGC 5139) contains many variable stars of different types, including the pulsating type II Cepheids, RR Lyrae and SX Phoenicis stars. We carried out a deep, wide-field, near-infrared (IR) variability survey of ω Cen, using the VISTA telescope. We assembled an unprecedented homogeneous and complete J and KS near-IR catalog of variable stars in the field of ω Cen. In this paper we compare optical and near-IR light curves of RR Lyrae stars, emphasizing the main differences. Moreover, we discuss the ability of near-IR observations to detect SX Phoenicis stars given the fact that the amplitudes are much smaller in these bands compared to the optical. Finally, we consider the case in which all the pulsating stars in the three different variability types follow a single period-luminosity relation in the near-IR bands.
AB - ω Centauri (NGC 5139) contains many variable stars of different types, including the pulsating type II Cepheids, RR Lyrae and SX Phoenicis stars. We carried out a deep, wide-field, near-infrared (IR) variability survey of ω Cen, using the VISTA telescope. We assembled an unprecedented homogeneous and complete J and KS near-IR catalog of variable stars in the field of ω Cen. In this paper we compare optical and near-IR light curves of RR Lyrae stars, emphasizing the main differences. Moreover, we discuss the ability of near-IR observations to detect SX Phoenicis stars given the fact that the amplitudes are much smaller in these bands compared to the optical. Finally, we consider the case in which all the pulsating stars in the three different variability types follow a single period-luminosity relation in the near-IR bands.
UR - http://www.scopus.com/inward/record.url?scp=85029548316&partnerID=8YFLogxK
U2 - 10.1051/epjconf/201715207005
DO - 10.1051/epjconf/201715207005
M3 - Conference contribution
AN - SCOPUS:85029548316
VL - 152
T3 - EPJ Web of Conferences
BT - Wide-Field Variability Surveys
A2 - Gieren, Wolfgang
A2 - Catelan, Marcio
A2 - Gieren, Wolfgang
A2 - Catelan, Marcio
PB - EDP Sciences
T2 - 22nd Los Alamos Stellar Pulsation Conference Series Meeting 2016
Y2 - 28 November 2016 through 2 December 2016
ER -