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Searching for variable stars in the cores of five metal-rich globular clusters using EMCCD observations
Skottfelt, J1,2; Bramich, DM3; Jaimes, RF4,5; Jorgensen, UG1,2; Kains, N4,6; Ferro, AA7; Alsubai, KA3; Bozza, V8,9; Novati, SC8,10,11; Ciceri, S12; D'Ago, G8,9; Dominik, M5; Galianni, P5; Gu SH(顾盛宏)13,14; Harpsoe, KBW1,2; Haugbolle, T1,2; Hinse, TC15; Hundertmark, M1,2,5; Juncher, D1,2; Korhonen, H1,2,16; Liebig, C5; Mancini, L12; Popovas, A1,2; Rabus, M12,17; Rahvar, S18; Scarpetta, G8,9,10; Schmidt, RW19; Snodgrass, C20; Southworth, J; Starkey, D5; Street, RA; Surdej, J; Wang XB(王晓彬)13,14; Wertz, O
Source PublicationASTRONOMY & ASTROPHYSICS
2015-01
Volume573
DOI10.1051/0004-6361/201424967
Contribution Rank第13完成单位
Indexed BySCI ; EI
KeywordGlobular Clusters: Individual Stars: Variables: Rr Lyrae Stars: Variables: General Instrumentation: High Angular Resolution
Abstract

Aims. In this paper, we present the analysis of time-series observations from 2013 and 2014 of five metal-rich ([Fe /H] > 1) globular clusters: NGC 6388, NGC 6441, NGC 6528, NGC 6638, and NGC 6652. The data have been used to perform a census of the variable stars in the central parts of these clusters. Methods. The observations were made with the electron-multiplying charge-couple device (EMCCD) camera at the Danish 1.54m Telescope at La Silla, Chile, and they were analysed using di ff erence image analysis to obtain high-precision light curves of the variable stars. Results. It was possible to identify and classify all of the previously known or suspected variable stars in the central regions of the five clusters. Furthermore, we were able to identify and, in most cases, classify 48, 49, 7, 8, and 2 previously unknown variables in NGC 6388, NGC 6441, NGC 6528, NGC 6638, and NGC 6652, respectively. Especially interesting is the case of NGC 6441, for which the variable star population of about 150 stars has been thoroughly examined by previous studies, including a Hubble Space Telescope study. In this paper we are able to present 49 new variable stars for this cluster, of which one (possibly two) are RR Lyrae stars, two areWVirginis stars, and the rest are long-period semi-regular or irregular variables on the red giant branch. We have also detected the first double-mode RR Lyrae in the cluster.

Funding ProjectDanish Natural Science Research Council ; Center of Excellence Centre for Star and Planet Formation (StarPlan) ; Danish National Research Foundation ; NPRP from the Qatar National Research Fund (a member of Qatar Foundation)[X-019-1-006] ; DGAPA-UNAM grant[IN104612] ; Qatar National Research Fund (a member of Qatar Foundation)[NPRP-09-476-1-78] ; European Union[268421] ; National Natural Science Foundation of China[10373023] ; National Natural Science Foundation of China[10773027] ; National Natural Science Foundation of China[11333006] ; apere Aude Starting Grant from The Danish Council for Independent Research ; Korea Research Council of Fundamental Science & Technology (KRCF) via the KRCF Young Scientist Research Fellowship Programme ; KASI travel[2013-9-400-00] ; European Commission ; FONDECYT[3120097] ; Communaute francaise de Belgique - Actions de recherche concertees - Academie Wallonie-Europe ; NASA[NAS5-26555] ; NASA Office of Space Science[NNX13AC07G]
Funding OrganizationDanish Natural Science Research Council ; Center of Excellence Centre for Star and Planet Formation (StarPlan) ; Danish National Research Foundation ; NPRP from the Qatar National Research Fund (a member of Qatar Foundation)[X-019-1-006] ; DGAPA-UNAM grant[IN104612] ; Qatar National Research Fund (a member of Qatar Foundation)[NPRP-09-476-1-78] ; European Union[268421] ; National Natural Science Foundation of China[10373023, 10773027, 11333006] ; apere Aude Starting Grant from The Danish Council for Independent Research ; Korea Research Council of Fundamental Science & Technology (KRCF) via the KRCF Young Scientist Research Fellowship Programme ; KASI travel[2013-9-400-00] ; European Commission ; FONDECYT[3120097] ; Communaute francaise de Belgique - Actions de recherche concertees - Academie Wallonie-Europe ; NASA[NAS5-26555] ; NASA Office of Space Science[NNX13AC07G]
Language英语
Subject Area天文学 ; 恒星与银河系 ; 恒星天文学
MOST Discipline Catalogue理学 ; 理学::天文学
SubtypeArticle
PublisherEDP SCIENCES S A
Publication Place17, AVE DU HOGGAR, PA COURTABOEUF, BP 112, F-91944 LES ULIS CEDEX A, FRANCE
ISSN0004-6361
URL查看原文
WOS IDWOS:000350806000038
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordRR-LYRAE STARS ; IMAGE-SUBTRACTION PHOTOMETRY ; COLOR-MAGNITUDE DIAGRAM ; X-RAY BINARIES ; NGC 6652 ; OPTICAL COUNTERPART ; CCD PHOTOMETRY ; NGC-6388 ; PARAMETERS ; NGC-6441
EI Accession Number20150600503185
EI KeywordsGiant stars
EI Classification Number657.2Extraterrestrial Physics and Stellar Phenomena - 922.2Mathematical Statistics
Citation statistics
Cited Times:12[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/6812
Collection系外行星研究组
中国科学院天体结构与演化重点实验室
Corresponding AuthorSkottfelt, J
Affiliation1.Niels Bohr Institute, University of Copenhagen, Juliane Maries Vej 30, 2100 København Ø, Denmark
2.Centre for Star and Planet Formation, Natural History Museum, University of Copenhagen, Østervoldgade 5–7, 1350 København K, Denmark
3.Qatar Environment and Energy Research Institute, Qatar Foundation, Tornado Tower, Floor 19, PO Box 5825, Doha, Qatar
4.European Southern Observatory, Karl-Schwarzschild-Straße 2, 85748 Garching bei München, Germany
5.SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews, KY16 9SS, UK
6.Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
7.Instituto de Astronomía Universidad Nacional Autónomade Mexico, 04510 Mexico, Mexico
8.Dipartimento di Fisica “E. R. Caianiello”, Università di Salerno, via Giovanni Paolo II 132, 84084 - Fisciano (SA), Italy
9.Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, 680126 Napoli, Italy
10.NASA Exoplanet Science Institute, MS 100-22, California Institute of Technology, Pasadena CA 91125, USA
11.Istituto Internazionale per gli Alti Studi Scientifici (IIASS), 84019 Vietri Sul Mare (SA), Italy
12.Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
13.Yunnan Observatories, Chinese Academy of Sciences, 650011 Kunming, PR China
14.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650011, PR China
15.Korea Astronomy and Space Science Institute, 305-348 Daejeon, Republic of Korea
16.Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Väisäläntie 20, 21500 Piikkiö, Finland
17.Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
18.Department of Physics, Sharif University of Technology, PO Box 11155-9161, Tehran, Iran
19.Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, Mönchhofstr. 12-14, 69120 Heidelberg, Germany
20.Planetary and Space Sciences, Department of Physical Sciences, The Open University, Milton Keynes, MK7 6AA, UK
Recommended Citation
GB/T 7714
Skottfelt, J,Bramich, DM,Jaimes, RF,et al. Searching for variable stars in the cores of five metal-rich globular clusters using EMCCD observations[J]. ASTRONOMY & ASTROPHYSICS,2015,573.
APA Skottfelt, J.,Bramich, DM.,Jaimes, RF.,Jorgensen, UG.,Kains, N.,...&Wertz, O.(2015).Searching for variable stars in the cores of five metal-rich globular clusters using EMCCD observations.ASTRONOMY & ASTROPHYSICS,573.
MLA Skottfelt, J,et al."Searching for variable stars in the cores of five metal-rich globular clusters using EMCCD observations".ASTRONOMY & ASTROPHYSICS 573(2015).
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