Article (Scientific journals)
OGLE-TR-211 - a new transiting inflated hot Jupiter from the OGLE survey and ESO LP666 spectroscopic follow-up program
Udalski, A.; Pont, F.; Naef, D. et al.
2008In Astronomy and Astrophysics, 482, p. 299-304
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Keywords :
planetary systems; stars: individual: OGLE-TR-211
Abstract :
[en] We present results of the photometric campaign for planetary and low-luminosity object transits conducted by the OGLE survey in the 2005 season (Campaign #5). About twenty of the most promising candidates discovered in these data were subsequently verified spectroscopically with the VLT/FLAMES spectrograph. One of the candidates, OGLE-TR-211, reveals clear changes of radial velocity with a small amplitude of 82 m/s, varying in phase with photometric transit ephemeris. Further analysis confirms the planetary nature of this system. Follow-up precise photometry of OGLE-TR-211 with VLT/FORS, together with radial velocity spectroscopy, supplemented with high-resolution, high S/N VLT/UVES spectra allowed us to derive parameters of the planet and host star. OGLE-TR-211b is a hot Jupiter orbiting an F7-8 spectral type dwarf star with a period of 3.68 days. The mass of the planet is equal to 1.03±0.20 M_Jup, while its radius 1.36[SUP]+0.18[/SUP][SUB]-0.09[/SUB] R_Jup. The radius is about 20% larger than the typical radius of hot Jupiters of similar mass. OGLE-TR-211b is, then, another example of inflated hot Jupiters - a small group of seven exoplanets with large radii and unusually low densities - objects that are a challenge to the current models of exoplanets. Based on observations made with the FORS1 camera and the FLAMES/UVES spectrograph at the VLT, ESO, Chile (program 07.C-0706, 076.C-0122, and 177.C-0666) and 1.3-m Warsaw Telescope at Las Campanas Observatory, Chile.
Disciplines :
Space science, astronomy & astrophysics
Author, co-author :
Udalski, A.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland ; The OGLE Team
Pont, F.;  Observatoire de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
Naef, D.;  European Southern Observatory, Casilla 19001, Santiago 19, Chile
Melo, C.;  European Southern Observatory, Casilla 19001, Santiago 19, Chile
Bouchy, F.;  Institut d'Astrophysique de Paris, 98bis Bd Arago, 75014 Paris, France
Santos, N. C.;  Centro de Astrofísica, Universidade do Porto, Rua das Estrelas, 4150-762 Porto, Portugal
Moutou, C.;  Laboratoire d'Astrophysique de Marseille, Traverse du Siphon, BP 8, Les Trois Lucs, 13376 Marseille Cedex 12, France
Díaz, R. F.;  Instituto de Astronomia y Física del Espacio (CONICET-UBA), Buenos Aires, Argentina
Gieren, W.;  Departamento de Fisica, Astronomy Group, Universidad de Concepción, Casilla 160-C, Concepción, Chile
Gillon, Michaël  ;  Université de Liège - ULiège > Département d'astrophys., géophysique et océanographie (AGO) > Astrophysique et traitement de l'image
Hoyer, S.;  Department of Astronomy, Universidad de Chile, Santiago, Chile
Mayor, M.;  Observatoire de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
Mazeh, T.;  School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
Minniti, D.;  Departmento de Astronomía y Astrofísica, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile
Pietrzynski, G.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland ; The OGLE Team ; Departamento de Fisica, Astronomy Group, Universidad de Concepción, Casilla 160-C, Concepción, Chile
Queloz, D.;  Observatoire de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
Ramirez, S.;  Institut d'Astrophysique de Paris, 98bis Bd Arago, 75014 Paris, France
Ruiz, M. T.;  Department of Astronomy, Universidad de Chile, Santiago, Chile
Shporer, A.;  School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
Tamuz, O.;  School of Physics and Astronomy, R. and B. Sackler Faculty of Exact Sciences, Tel Aviv University, Tel Aviv, Israel
Udry, S.;  Observatoire de Genève, 51 Chemin des Maillettes, 1290 Sauverny, Switzerland
Zoccali, M.;  Departmento de Astronomía y Astrofísica, Pontificia Universidad Católica de Chile, Casilla 306, Santiago 22, Chile
Kubiak, M.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland ; The OGLE Team
Szymanski, M. K.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
Soszynski, I.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
Szewczyk, O.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland ; The OGLE Team ; Departamento de Fisica, Astronomy Group, Universidad de Concepción, Casilla 160-C, Concepción, Chile
Ulaczyk, K.;  Warsaw University Observatory, Al. Ujazdowskie 4, 00-478 Warsaw, Poland
Wyrzykowski, L.;  The OGLE Team ; Institute of Astronomy, University of Cambridge, Madingley Road, Cambridge CB3 0HA, UK
More authors (18 more) Less
Language :
English
Title :
OGLE-TR-211 - a new transiting inflated hot Jupiter from the OGLE survey and ESO LP666 spectroscopic follow-up program
Publication date :
01 April 2008
Journal title :
Astronomy and Astrophysics
ISSN :
0004-6361
eISSN :
1432-0746
Publisher :
EDP Sciences, Les Ulis, France
Volume :
482
Pages :
299-304
Peer reviewed :
Peer Reviewed verified by ORBi
Commentary :
http://de.arxiv.org/abs/0711.3978
Available on ORBi :
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