The ¿666¿ collaboration on OGLE transits

• Type: Article in International Scientific Journal
• Date: 2007

Authors

Pont, F (Author) Other; Moutou, C (Author) Other; Gillon, M (Author) Other; Udalski, A (Author) Other; Bouchy, F (Author) Other; Fernandes, JM (Author) Other; Gieren, W (Author) Other; Mayor, M (Author) Other; Mazeh, T (Author) Other; Minniti, D (Author) Other; Melo, C (Author) Other; Naef, D (Author) Other; Pietrzynski, G (Author) Other; Queloz, D (Author) Other; Ruiz, MT (Author) Other; N.C. Santos (Author) Other; Udry, S (Author) Other

Journal

Title: Astronomy and Astrophysics

Vol. 465

Pages: 1069-1074

ISSN: 0004-6361

Publisher: EDP Sciences

Indexing

ISI Web of Knowledge - 38 Citations

Scopus - 37 Citations

Other information

Authenticus ID: P-00H-KRZ

DOI: 10.1051/0004-6361:20066645

Abstract (EN): Transiting planets are essential to study the structure and evolution of extra-solar planets. For that purpose, it is important to measure precisely the radius of these planets. Here we report new high-accuracy photometry of the transits of OGLE-TR-10 and OGLE-TR-56 with VLT/FORS1. One transit of each object was covered in Bessel V and R filters, and treated with the deconvolution-based photometry algorithm DECPHOT, to ensure accurate millimagnitude light curves. Together with earlier spectroscopic measurements, the data imply a radius of 1.22(-0.07)(+0.12) R-J for OGLE-TR-10b and 1.30 +/- 0.05 R-J for OGLE-TR-56b. A re-analysis of the original OGLE photometry resolves an earlier discrepancy about the radius of OGLE-TR-10. The transit of OGLE-TR-56 is almost grazing, so that small systematics in the photometry can cause large changes in the derived radius. Our study confirms both planets as inflated hot Jupiters, with large radii comparable to that of HD 209458b and at least two other recently discovered transiting gas giants.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6