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

• Tipo: Artigo em Revista Científica Internacional
• Data: 2008

Autores

Udalski, A (Autor) Outra; Pont, F (Autor) Outra; Naef, D (Autor) Outra; Melo, C (Autor) Outra; Bouchy, F (Autor) Outra; N.C. Santos (Autor) Outra; Moutou, C (Autor) Outra; Diaz, RF (Autor) Outra; Gieren, W (Autor) Outra; Gillon, M (Autor) Outra; Hoyer, S (Autor) Outra; Mayor, M (Autor) Outra; Mazeh, T (Autor) Outra; Minniti, D (Autor) Outra; Pietrzynski, G (Autor) Outra; Queloz, D (Autor) Outra; Ramirez, S (Autor) Outra; Ruiz, MT (Autor) Outra; Shporer, A (Autor) Outra; Tamuz, O (Autor) Outra; Udry, S (Autor) Outra; Zoccali, M (Autor) Outra; Kubiak, M (Autor) Outra; Szymanski, MK (Autor) Outra; Soszynski, I (Autor) Outra; Szewczyk, O (Autor) Outra; Ulaczyk, K (Autor) Outra; Wyrzykowski, L (Autor) Outra

Revista

Título: Astronomy and Astrophysics

Vol. 482

Páginas: 299-304

ISSN: 0004-6361

Editora: EDP Sciences

Indexação

ISI Web of Knowledge - 31 Citações

Scopus - 32 Citações

Outras Informações

ID Authenticus: P-004-09B

DOI: 10.1051/0004-6361:20079143

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/NVLT/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(-0.09)(+0.18) 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.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6