Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations

Camila Navarrete, Márcio Catelan, Rodrigo Contreras Ramos, Javier Alonso-García, Felipe Gran, István Dékány, Dante Minniti

Resultado de la investigación: Contribución a los tipos de informe/libroContribución a la conferenciarevisión exhaustiva

Resumen

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.

Idioma originalInglés
Título de la publicación alojadaWide-Field Variability Surveys
Subtítulo de la publicación alojadaA 21st Century Perspective - 22nd Los Alamos Stellar Pulsation - Conference Series Meeting
EditoresWolfgang Gieren, Marcio Catelan, Wolfgang Gieren, Marcio Catelan
EditorialEDP Sciences
Volumen152
ISBN (versión digital)9782759890248
DOI
EstadoPublicada - 8 sep 2017
Evento22nd Los Alamos Stellar Pulsation Conference Series Meeting 2016 - San Pedro de Atacama, Chile
Duración: 28 nov 20162 dic 2016

Serie de la publicación

NombreEPJ Web of Conferences
Volumen152
ISSN (versión impresa)2101-6275
ISSN (versión digital)2100-014X

Conferencia

Conferencia22nd Los Alamos Stellar Pulsation Conference Series Meeting 2016
País/TerritorioChile
CiudadSan Pedro de Atacama
Período28/11/162/12/16

Áreas temáticas de ASJC Scopus

  • Física y astronomía (todo)

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