ORBi: Udalski A. - OGLE-TR-211 - a new transiting inflated hot Jupiter from the OGLE survey and ESO LP666 spectroscopic follow-up program

Reference : OGLE-TR-211 - a new transiting inflated hot Jupiter from the OGLE survey and ESO LP666 s...


	Document type :	Scientific journals : Article
	Discipline(s) :	Physical, chemical, mathematical & earth Sciences : Space science, astronomy & astrophysics
	To cite this reference:	http://hdl.handle.net/2268/27441

Title :	OGLE-TR-211 - a new transiting inflated hot Jupiter from the OGLE survey and ESO LP666 spectroscopic follow-up program
Language :	English
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 - ULg > 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]
Publication date :	1-Apr-2008
Journal title :	Astronomy and Astrophysics
Publisher :	EDP Sciences
Volume :	482
Pages :	299-304
Audience :	International
ISSN :	0004-6361
e-ISSN :	1432-0746
City :	Les Ulis
Country :	France
Keywords :	[en] 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.
Permalink :	http://hdl.handle.net/2268/27441
DOI :	10.1051/0004-6361:20079143
Other URL :	http://adsabs.harvard.edu/abs/2008A%26A...482..299U
Commentary :	http://de.arxiv.org/abs/0711.3978

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