The "666" collaboration on OGLE transits I. Accurate radius of the planets OGLE-TR-10b and OGLE-TR-56b with VLT deconvolution photometry

F. Pont, C. Moutou, M. Gillon, A. Udalski, F. Bouchy, J. M. Fernandas, W. Gieren, M. Mayor, T. Mazeh, D. Minniti, C. Melo, D. Naef, G. Pietrzynsk, D. Queloz, M. T. Ruiz, N. C. Santos, S. Udry

Resultado de la investigación: Contribución a una revistaArtículo

32 Citas (Scopus)

Resumen

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 RJ for OGLE-TR-10b and 1.30±0.05 RJ 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.

Idioma originalInglés
Páginas (desde-hasta)1069-1074
Número de páginas6
PublicaciónAstronomy and Astrophysics
Volumen465
N.º3
DOI
EstadoPublicada - abr 2007

Áreas temáticas de ASJC Scopus

  • Ciencias planetarias y espacial
  • Astronomía y astrofísica

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    Pont, F., Moutou, C., Gillon, M., Udalski, A., Bouchy, F., Fernandas, J. M., Gieren, W., Mayor, M., Mazeh, T., Minniti, D., Melo, C., Naef, D., Pietrzynsk, G., Queloz, D., Ruiz, M. T., Santos, N. C., & Udry, S. (2007). The "666" collaboration on OGLE transits I. Accurate radius of the planets OGLE-TR-10b and OGLE-TR-56b with VLT deconvolution photometry. Astronomy and Astrophysics, 465(3), 1069-1074. https://doi.org/10.1051/0004-6361:20066645