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Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry
Kains, N1; Bramich, DM1; Ferro, AA2; Jaimes, RF1,3; Jorgensen, UG4,5; Giridhar, S6; Penny, MT7; Alsubai, KA8; Andersen, JM5,9; Bozza, V10,11; Browne, P3; Burgdorf, M12; Novati, SC10,13; Damerdji, Y14; Diehl, C15,16; Dodds, P3; Dominik, M3; Elyiv, A14,17; Fang XS(房祥松)18,19; Giannini, E15; Gu SH(顾盛宏)18,19; Hardis, S4; Harpsoe, K4,5; Hinse, TC4,20; Hornstrup, A; Hundertmark, M3; Jessen-Hansen, J; Juncher, D4,5; Kerins, E; Kjeldsen, H; Korhonen, H4,5; Liebig, C3; Lund, MN; Lundkvist, M; Mancini, L; Martin, R; Mathiasen, M4; Rabus, M; Rahvar, S; Ricci, D; Sahu, K; Scarpetta, G; Skottfelt, J4,5; Snodgrass, C; Southworth, J; Surdej, J14; Tregloan-Reed, J; Vilela, C; Wertz, O14; Williams, A; Kains, N (reprint author), European So Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany.
发表期刊ASTRONOMY & ASTROPHYSICS
2013-07
卷号555
DOI10.1051/0004-6361/201321819
产权排序第18完成单位
收录类别SCI ; EI
关键词Stars: Variables: General Stars: Variables: Rr Lyrae Globular Clusters: Individual: m 30 (Ngc 7099)
摘要Aims. We present the analysis of 26 nights of V and I time-series observations from 2011 and 2012 of the globular cluster M 30 (NGC 7099). We used our data to search for variable stars in this cluster and refine the periods of known variables; we then used our variable star light curves to derive values for the cluster's parameters. Methods. We used difference image analysis to reduce our data to obtain high-precision light curves of variable stars. We then estimated the cluster parameters by performing a Fourier decomposition of the light curves of RR Lyrae stars for which a good period estimate was possible. We also derive an estimate for the age of the cluster by fitting theoretical isochrones to our colour-magnitude diagram (CMD). Results. Out of 13 stars previously catalogued as variables, we find that only 4 are bona fide variables. We detect two new RR Lyrae variables, and confirm two additional RR Lyrae candidates from the literature. We also detect four other new variables, including an eclipsing blue straggler system, and an SX Phoenicis star. This amounts to a total number of confirmed variable stars in M 30 of 12. We perform Fourier decomposition of the light curves of the RR Lyrae stars to derive cluster parameters using empirical relations. We find a cluster metallicity [Fe/H](ZW) = -2.01 +/- 0.04, or [Fe/H](UVES) = -2.11 +/- 0.06, and a distance of 8.32 +/- 0.20 kpc (using RR0 variables), 8.10 kpc (using one RR1 variable), and 8.35 +/- 0.42 kpc (using our SX Phoenicis star detection in M 30). Fitting isochrones to the CMD, we estimate an age of 13.0 +/- 1.0 Gyr for M 30.
项目资助者ESO Fellowship ; European Community's Seventh Framework Programme (/FP7) [229517] ; DGAPA-UNAM [IN104612] ; CONACyT (Mexico) ; Department of Science and Technology (India) [DST/INT/MEXICO/RP001/2008] ; Communaute francaise de Belgique - Actions de recherche concertees - Academie universitaire Wallonie-Europe ; Korea Research Council for Fundamental Science and Technology (KRCF) through the Young Research Scientist Fellowship Program ; KASI (Korea Astronomy and Space Science Institute) [2012-1-410-02] ; NPRP grant from the Qatar National Research Fund [NPRP-09-476-1-78] ; Danish Natural Science Foundation (FNU) ; Danish National Research Foundation ; ASTERoseismic Investigations ; SONG ; Kepler (ASTERISK) ; European Research Council [267864] ; European Union Seventh Framework Programme (FP7) [268421] ; National Natural Science Foundation of China [10373023, 10773027] ; Marie-Curie Intra-European Fellowship
语种英语
学科领域Astronomy & Astrophysics
文章类型Article
ISSN0004-6361
URL查看原文
WOS记录号WOS:000322008600036
WOS研究方向Astronomy & Astrophysics
WOS类目Astronomy & Astrophysics
关键词[WOS]RR-LYRAE VARIABLES ; DIFFERENCE IMAGE-ANALYSIS ; LARGE-MAGELLANIC-CLOUD ; DEEP CCD PHOTOMETRY ; SX PHOENICIS STARS ; METAL ABUNDANCES ; LUMINOSITY FUNCTION ; DWARF NOVAE ; M30 ; NGC-7099
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被引频次:16[WOS]   [WOS记录]     [WOS相关记录]
文献类型期刊论文
条目标识符http://ir.ynao.ac.cn/handle/114a53/6793
专题系外行星研究组
中国科学院天体结构与演化重点实验室
通讯作者Kains, N (reprint author), European So Observ, Karl Schwarzschild Str 2, D-85748 Garching, Germany.
作者单位1.European Southern Observatory, Karl-Schwarzschild Straße 2, 85748 Garching bei München, Germany
2.Instituto de Astronomía, Universidad Nacional Autónoma de Mexico, 04510 Ciudad de Mexico, Mexico
3.SUPA School of Physics & Astronomy, University of St Andrews, North Haugh, St. Andrews, KY16 9SS, UK
4.Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, 2100 Copenhagen, Denmark
5.Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5, 1350 Copenhagen, Denmark
6.Indian Institute of Astrophysics, Koramangala, 560034 Bangalore, India
7.Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA
8.Qatar Foundation, PO Box, 5825 Doha, Qatar
9.Department of Astronomy, Boston University, 725 Commonwealth Ave, Boston, MA 02215, USA
10.Dipartimento di Fisica “E.R Caianiello”, Universit di Salerno, via Ponte Don Melillo, 84084 Fisciano, Italy
11.Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Italy
12.HE Space Operations GmbH, Flughafenallee 24, 28199 Bremen, Germany
13.Istituto Internazionale per gli Alti Studi Scientifici (IIASS), 84019 Vietri Sul Mare ( SA), Italy
14.Institut d’Astrophysique et de Géophysique, Université de Liège, Allée du 6 Août 17, Sart Tilman, Bât. B5c, 4000 Liège, Belgium
15.Astronomisches Rechen – Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12−14, 69120 Heidelberg, Germany
16.Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, 21029 Hamburg, Germany
17.Main Astronomical Observatory, Academy of Sciences of Ukraine, vul. Akademika Zabolotnoho 27, 03680 Kyiv, Ukraine
18.National Astronomical Observatories/Yunnan Observatory, Chinese Academy of Sciences, 650011 Kunming, PR China
19.Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, 650011 Kunming, PR China
20.Korea Astronomy and Space Science Institute, 305-348 Daejeon, Korea
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Kains, N,Bramich, DM,Ferro, AA,et al. Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry[J]. ASTRONOMY & ASTROPHYSICS,2013,555.
APA Kains, N.,Bramich, DM.,Ferro, AA.,Jaimes, RF.,Jorgensen, UG.,...&Kains, N .(2013).Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry.ASTRONOMY & ASTROPHYSICS,555.
MLA Kains, N,et al."Estimating the parameters of globular cluster M 30 (NGC 7099) from time-series photometry".ASTRONOMY & ASTROPHYSICS 555(2013).
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