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Exploring the crowded central region of ten Galactic globular clusters using EMCCDs Variable star searches and new discoveries
Jaimes, R. Figuera1,2; Bramich, D. M.3; Skottfelt, J.4,5; Kains, N.6; Jorgensen, U. G.5; Horne, K.1; Dominik, M.1; Alsubai, K. A.3; Bozza, V.7,8; Novati, S. Calchi7,9,10; Ciceri, S.11; D'Ago, G.10; Galianni, P.1; Gu SH(顾盛宏)12,13; Harpsoe, K. B. W.5; Haugbolle, T.5; Hinse, T. C.14; Hundertmark, M.1,5; Juncher, D.5; Korhonen, H.5,15; Mancini, L.11; Popovas, A.5; Rabus, M.11,16; Rahvar, S.17; Scarpetta, G.7,8,10; Schmidt, R. W.18; Snodgrass, C.19,20; Southworth, J.21; Starkey, D.1; Street, R. A.22; Surdej, J.23; Wang XB(王晓彬)12,13; Wertz, O.23; MiNDSTEp Consortium
Source PublicationASTRONOMY & ASTROPHYSICS
2016-04-01
Volume588
DOI10.1051/0004-6361/201527641
Contribution Rank第12完成单位
Indexed BySCI ; EI
Keywordblue stragglers galaxies: star clusters: general globular clusters: general stars: variables: RR Lyrae novae, cataclysmic variables instrumentation: high angular resolution
Abstract

Aims. We aim to obtain time-series photometry of the very crowded central regions of Galactic globular clusters; to obtain better angular resolution than has been previously achieved with conventional CCDs on ground-based telescopes; and to complete, or improve, the census of the variable star population in those stellar systems. 

Methods. Images were taken using the Danish 1.54-m Telescope at the ESO observatory at La Silla in Chile. The telescope was equipped with an electron-multiplying CCD, and the short-exposure-time images obtained (ten images per second) were stacked using the shift-and-add technique to produce the normal-exposure-time images (minutes). Photometry was performed via difference image analysis. Automatic detection of variable stars in the field was attempted. 

Results. The light curves of 12 541 stars in the cores of ten globular clusters were statistically analysed to automatically extract the variable stars. We obtained light curves for 31 previously known variable stars (3 long-period irregular, 2 semi-regular, 20 RR Lyrae, 1 SX Phoenicis, 3 cataclysmic variables, 1 W Ursae Majoris-type and 1 unclassified) and we discovered 30 new variables (16 long-period irregular, 7 semi-regular, 4 RR Lyrae, 1 SX Phoenicis and 2 unclassified). Fluxes and photometric measurements for these stars are available in electronic form through the Strasbourg astronomical Data Center.

Funding ProjectDanish Natural Science Foundation (FNU) ; NPRP from the Qatar National Research Fund (a member of Qatar Foundation)[X-019-1-006] ; STFC[ST/M001296/1] ; Regione Campania from POR-FSE Campania ; Sapere Aude Starting Grant from the Danish Council for Independent Research ; Danish National Research Foundation ; Korea Research Council of Fundamental Science & Technology (KRCF) via the KRCF Young Scientist Research Fellowship Programme ; KASI[2013-9-400-00] ; Korea Research Council of Fundamental Science & Technology (KRCF) via the KRCF Young Scientist Research Fellowship Programme ; KASI[2014-1-400-06] ; Communaute francaise de Belgique - Actions de recherche concertees - Academie Wallonie-Europe
Funding OrganizationDanish Natural Science Foundation (FNU) ; NPRP from the Qatar National Research Fund (a member of Qatar Foundation)[X-019-1-006] ; STFC[ST/M001296/1] ; Regione Campania from POR-FSE Campania ; Sapere Aude Starting Grant from the Danish Council for Independent Research ; Danish National Research Foundation ; Korea Research Council of Fundamental Science & Technology (KRCF) via the KRCF Young Scientist Research Fellowship Programme ; KASI[2013-9-400-00, 2014-1-400-06] ; Communaute francaise de Belgique - Actions de recherche concertees - Academie Wallonie-Europe
Language英语
Subject Area天文学 ; 天体物理学 ; 高能天体物理学 ; 星系与宇宙学 ; 星系际物质
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:000373207800140
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS KeywordDIFFERENCE IMAGE-ANALYSIS ; RR LYRAE STARS ; MILLISECOND PULSARS ; OMEGA-CENTAURI ; DWARF NOVAE ; CATALOG ; CORE ; FIELD ; PHOTOMETRY ; MASS
EI Accession Number20161702293557
EI KeywordsStars
EI Classification Number657.2Extraterrestrial Physics and Stellar Phenomena - 941.4Optical Variables Measurements
Citation statistics
Cited Times:4[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.ynao.ac.cn/handle/114a53/9581
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 AuthorJaimes, R. Figuera
Affiliation1.SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews, KY16 9SS, UK
2.European Southern Observatory, Karl-Schwarzschild-Straße 2, 85748 Garching bei München, Germany
3.Qatar Environment and Energy Research Institute (QEERI), HBKU, Qatar Foundation, Doha, Qatar
4.Centre for Electronic Imaging, Dept. of Physical Sciences, The Open University, Milton Keynes MK7 6AA, UK
5.Niels Bohr Institute and Centre for Star and Planet Formation, University of Copenhagen, Øster Voldgade 5, 1350 Copenhagen K, Denmark
6.Space Telescope Science Institute, 3700 San Martin Drive, Baltimore, MD 21218, USA
7.Dipartimento di Fisica “E. R. Caianiello”, Università di Salerno, via Giovanni Paolo II 132, 84084 - Fisciano (SA), Italy
8.Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Napoli, Italy
9.NASA Exoplanet Science Institute, MS 100-22, California Institute of Technology, Pasadena CA 91125, USA
10.Istituto Internazionale per gli Alti Studi Scientifici (IIASS), 84019 Vietri Sul Mare (SA), Italy
11.Max Planck Institute for Astronomy, Königstuhl 17, 69117 Heidelberg, Germany
12.Yunnan Observatories, Chinese Academy of Sciences, 650011 Kunming, PR China
13.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, PR China
14.Korea Astronomy and Space Science Institute, 305-348 Daejeon, Republic of Korea
15.Finnish Centre for Astronomy with ESO (FINCA), University of Turku, Väisäläntie 20, 21500 Piikkiö, Finland
16.Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile
17.Department of Physics, Sharif University of Technology, PO Box 11155-9161, Tehran, Iran
18.Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg, Mönchhofstr. 12-14, 69120 Heidelberg, Germany
19.Planetary and Space Sciences, Department of Physical Sciences, The Open University, Milton Keynes, MK7 6AA, UK
20.Max-Planck-Institute for Solar System Research, Justus-von-Liebig-Weg 3, 37077 Göttingen, Germany
21.Astrophysics Group, Keele University, Staffordshire, ST5 5BG, UK
22.Las Cumbres Observatory Global Telescope Network, 6740 Cortona Drive, Suite 102, Goleta, CA 93117, USA
23.Institut d’Astrophysique et de Géophysique, Université de Liège, Allée du 6 Août, Bât. B5c, 4000 Liège, Belgium
Recommended Citation
GB/T 7714
Jaimes, R. Figuera,Bramich, D. M.,Skottfelt, J.,et al. Exploring the crowded central region of ten Galactic globular clusters using EMCCDs Variable star searches and new discoveries[J]. ASTRONOMY & ASTROPHYSICS,2016,588.
APA Jaimes, R. Figuera.,Bramich, D. M..,Skottfelt, J..,Kains, N..,Jorgensen, U. G..,...&MiNDSTEp Consortium.(2016).Exploring the crowded central region of ten Galactic globular clusters using EMCCDs Variable star searches and new discoveries.ASTRONOMY & ASTROPHYSICS,588.
MLA Jaimes, R. Figuera,et al."Exploring the crowded central region of ten Galactic globular clusters using EMCCDs Variable star searches and new discoveries".ASTRONOMY & ASTROPHYSICS 588(2016).
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