Reference : A detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD di...
Scientific journals : Article
Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
http://hdl.handle.net/2268/158517
A detailed census of variable stars in the globular cluster NGC 6333 (M9) from CCD differential photometry
English
Arellano Ferro, A. mailto [Instituto de Astronomía, Universidad Nacional Autónoma de México, Ciudad Universitaria CP 04510, Mexico;]
Bramich, D. M. [European Southern Observatory, Karl-Schwarzschild-Straβe 2, D-85748 Garching bei München, Germany]
Figuera Jaimes, R. [European Southern Observatory, Karl-Schwarzschild-Straβe 2, D-85748 Garching bei München, Germany; SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews KY16 9SS, UK]
Giridhar, Sunetra [Indian Institute of Astrophysics, Koramangala 560034, Bangalore, India]
Kains, N. [European Southern Observatory, Karl-Schwarzschild-Straβe 2, D-85748 Garching bei München, Germany]
Kuppuswamy, K. [Indian Institute of Astrophysics, Koramangala 560034, Bangalore, India]
Jørgensen, U. G. [Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, DK-2100 Copenhagen, Denmark; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5, DK-1350 Copenhagen, Denmark]
Alsubai, K. A. [Qatar Foundation, PO Box 5825, Doha, Qatar]
Andersen, J. M. [Department of Astronomy, Boston University, 725 Commonwealth Ave, Boston, MA 02215, USA; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5, DK-1350 Copenhagen, Denmark]
Bozza, V. [Dipartimento di Fisica `E.R Caianiello', Universit di Salerno, Via Ponte Don Melillo, I-84084 Fisciano, Italy; Istituto Nazionale di Fisica Nucleare, Sezione di Napoli, Italy]
Browne, P. [SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews KY16 9SS, UK]
Calchi Novati, S. [Dipartimento di Fisica `E.R Caianiello', Universit di Salerno, Via Ponte Don Melillo, I-84084 Fisciano, Italy; Istituto Internazionale per gli Alti Studi Scientifici (IIASS), Vietri Sul Mare (SA), Italy]
Damerdji, Yassine mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Diehl, C. [Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, D-69120 Heidelberg, Germany; Hamburger Sternwarte, Universität Hamburg, Gojenbergsweg 112, D-21029 Hamburg, Germany]
Dominik, M. [SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews KY16 9SS, UK]
Dreizler, S. [Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany]
Elyiv, Andrii mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Giannini, E. [Astronomisches Rechen-Institut, Zentrum für Astronomie der Universität Heidelberg (ZAH), Mönchhofstr. 12-14, D-69120 Heidelberg, Germany]
Harpsøe, K. [Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, DK-2100 Copenhagen, Denmark; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5, DK-1350 Copenhagen, Denmark]
Hessman, F. V. [Institut für Astrophysik, Georg-August-Universität, Friedrich-Hund-Platz 1, D-37077 Göttingen, Germany]
Hinse, T. C. [Korea Astronomy and Space Science Institute, Daejeon 305-348, Korea; Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, DK-2100 Copenhagen, Denmark]
Hundertmark, M. [SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews KY16 9SS, UK]
Juncher, D. [Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, DK-2100 Copenhagen, Denmark; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5, DK-1350 Copenhagen, Denmark]
Kerins, E. [Jodrell Bank Centre for Astrophysics, University of Manchester, Oxford Road, Manchester M13 9PL, UK]
Korhonen, H. [Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, DK-2100 Copenhagen, Denmark; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5, DK-1350 Copenhagen, Denmark]
Liebig, C. [SUPA, School of Physics and Astronomy, University of St. Andrews, North Haugh, St Andrews KY16 9SS, UK]
Mancini, L. [Max Planck Institute for Astronomy, Königstuhl 17, D-69117 Heidelberg, Germany]
Mathiasen, M. [Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, DK-2100 Copenhagen, Denmark]
Penny, M. T. [Department of Astronomy, Ohio State University, 140 West 18th Avenue, Columbus, OH 43210, USA]
Rabus, M. [Instituto de Astrofísica, Facultad de Física, Pontificia Universidad Católica de Chile, Av. Vicuña Mackenna 4860, 7820436 Macul, Santiago, Chile]
Rahvar, S. [Department of Physics, Sharif University of Technology, PO Box 11155-9161, Tehran, Iran; Perimeter Institute for Theoretical Physics, 31 Caroline St. N., Waterloo ON N2L 2Y5, Canada]
Ricci, Davide mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Scarpetta, G. [Dipartimento di Fisica `E.R Caianiello', Universit di Salerno, Via Ponte Don Melillo, I-84084 Fisciano, Italy; INFN, Gruppo Collegato di Salerno, Sezione di Napoli, Italy]
Skottfelt, J. [Niels Bohr Institute, University of Copenhagen, Juliane Maries vej 30, DK-2100 Copenhagen, Denmark; Centre for Star and Planet Formation, Geological Museum, Øster Voldgade 5, DK-1350 Copenhagen, Denmark]
Snodgrass, C. [Max Planck Institute for Solar System Research, Max-Planck-Str. 2, D-37191 Katlenburg-Lindau, Germany]
Southworth, J. [Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK]
Surdej, Jean mailto [Université de Liège - ULiège > > >]
Tregloan-Reed, J. [Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK]
Vilela, C. [Astrophysics Group, Keele University, Staffordshire ST5 5BG, UK]
Wertz, Olivier mailto [Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astroph. extragalactique et observations spatiales (AEOS) >]
Mindstep Consortium [> >]
1-Sep-2013
Monthly Notices of the Royal Astronomical Society
434
1220-1238
Yes (verified by ORBi)
International
0035-8711
1365-2966
[en] stars: fundamental parameters ; globular clusters: individual: NGC 6333 ; stars: variables: general ; stars: variables: RR Lyrae
[en] We report CCD V and I time series photometry of the globular cluster NGC 6333 (M9). The technique of difference image analysis has been used, which enables photometric precision better than 0.05 mag for stars brighter than V ˜ 19.0 mag, even in the crowded central regions of the cluster. The high photometric precision has resulted in the discovery of two new RRc stars, three eclipsing binaries, seven long-term variables and one field RRab star behind the cluster. A detailed identification chart and equatorial coordinates are given for all the variable stars in the field of our images of the cluster. Our data together with the literature V-data obtained in 1994 and 1995 allowed us to refine considerably the periods for all RR Lyrae stars. The nature of the new variables is discussed. We argue that variable V12 is a cluster member and an Anomalous Cepheid. Secular period variations, double-mode pulsations and/or the Blazhko-like modulations in some RRc variables are addressed. Through the light-curve Fourier decomposition of 12 RR Lyrae stars we have calculated a mean metallicity of [Fe/H][SUB]ZW[/SUB] = -1.70 ± 0.01(statistical) ± 0.14(systematic) or [Fe/H]_{text{UVES}}=-1.67 ± 0.01(statistical) ± 0.19(systematic). Absolute magnitudes, radii and masses are also estimated for the RR Lyrae stars. A detailed search for SX Phe stars in the Blue Straggler region was conducted but none were discovered. If SX Phe exist in the cluster then their amplitudes must be smaller than the detection limit of our photometry. The colour-magnitude diagram has been corrected for heavy differential reddening using the detailed extinction map of the cluster of Alonso-García et al. This has allowed us to set the mean cluster distance from two independent estimates; from the RRab and RRc absolute magnitudes, we find 8.04 ± 0.19 and 7.88 ± 0.30 kpc, respectively.
http://hdl.handle.net/2268/158517
10.1093/mnras/stt1080
http://esoads.eso.org/abs/2013MNRAS.434.1220A
http://de.arxiv.org/abs/1306.3206

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