Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations
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 an...
| Main Authors: | , , , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
EDP Sciences
2017-01-01
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| Series: | EPJ Web of Conferences |
| Online Access: | https://doi.org/10.1051/epjconf/201715207005 |
| _version_ | 1818655183282896896 |
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| author | Navarrete Camila Catelan Márcio Contreras Ramos Rodrigo Alonso-García Javier Gran Felipe Dékány István Minniti Dante |
| author_facet | Navarrete Camila Catelan Márcio Contreras Ramos Rodrigo Alonso-García Javier Gran Felipe Dékány István Minniti Dante |
| author_sort | Navarrete Camila |
| collection | DOAJ |
| description | 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. |
| first_indexed | 2024-12-17T03:05:38Z |
| format | Article |
| id | doaj.art-55fb4b24fe874e8990d25c07e27a1fb7 |
| institution | Directory Open Access Journal |
| issn | 2100-014X |
| language | English |
| last_indexed | 2024-12-17T03:05:38Z |
| publishDate | 2017-01-01 |
| publisher | EDP Sciences |
| record_format | Article |
| series | EPJ Web of Conferences |
| spelling | doaj.art-55fb4b24fe874e8990d25c07e27a1fb72022-12-21T22:05:57ZengEDP SciencesEPJ Web of Conferences2100-014X2017-01-011520700510.1051/epjconf/201715207005epjconf_puls2017_07005Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relationsNavarrete CamilaCatelan MárcioContreras Ramos RodrigoAlonso-García JavierGran FelipeDékány István0Minniti DanteAstronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelbergω 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.https://doi.org/10.1051/epjconf/201715207005 |
| spellingShingle | Navarrete Camila Catelan Márcio Contreras Ramos Rodrigo Alonso-García Javier Gran Felipe Dékány István Minniti Dante Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations EPJ Web of Conferences |
| title | Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations |
| title_full | Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations |
| title_fullStr | Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations |
| title_full_unstemmed | Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations |
| title_short | Pulsating stars in ω Centauri. Near-IR properties and period-luminosity relations |
| title_sort | pulsating stars in ω centauri near ir properties and period luminosity relations |
| url | https://doi.org/10.1051/epjconf/201715207005 |
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