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

• Type: Article in International Scientific Journal
• Date: 2008

Authors

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

Journal

Title: Astronomy and Astrophysics

Vol. 482

Pages: 299-304

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 31 Citations

Scopus - 32 Citations

Other information

Authenticus ID: 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.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6