Refined parameters and spectroscopic transit of the super-massive planet HD 147506b

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

Autores

Loeillet, B (Autor) Outra; Shporer, A (Autor) Outra; Bouchy, F (Autor) Outra; Pont, F (Autor) Outra; Mazeh, T (Autor) Outra; Beuzit, JL (Autor) Outra; Boisse, I (Autor) Outra; Bonfils, X (Autor) Outra; Da Silva, R (Autor) Outra; Delfosse, X (Autor) Outra; Desort, M (Autor) Outra; Ecuvillon, A (Autor) Outra; Forveille, T (Autor) Outra; Galland, F (Autor) Outra; Gallenne, A (Autor) Outra; Hebrard, G (Autor) Outra; Lagrange, AM (Autor) Outra; Lovis, C (Autor) Outra; Mayor, M (Autor) Outra; Moutou, C (Autor) Outra; Pepe, F (Autor) Outra; Perrier, C (Autor) Outra; Queloz, D (Autor) Outra; Segransan, D (Autor) Outra; Sivan, JP (Autor) Outra; N.C. Santos (Autor) Outra; Tsodikovich, Y (Autor) Outra; Udry, S (Autor) Outra; Vidal Madjar, A (Autor) Outra

Revista

Título: Astronomy and Astrophysics

Vol. 481

Páginas: 529-533

ISSN: 0004-6361

Editora: EDP Sciences

Indexação

ISI Web of Knowledge - 61 Citações

Scopus - 60 Citações

Outras Informações

ID Authenticus: P-004-09C

DOI: 10.1051/0004-6361:20078167

Abstract (EN): In this paper, we report a refined determination of the orbital parameters and the detection of the Rossiter-McLaughlin effect of the recently discovered transiting exoplanet HD 147506b (HAT-P-2b). The large orbital eccentricity at the short orbital period of this exoplanet is unexpected and is distinguishing from other known transiting exoplanets. We performed high-precision radial velocity spectroscopic observations of HD 147506 (HAT-P-2) with the new spectrograph SOPHIE, mounted on the 1.93 m telescope at the Haute-Provence observatory (OHP). We obtained 63 new measurements, including 35 on May 14 and 20 on June 11, when the planet was transiting its parent star. The radial velocity ( RV) anomaly observed illustrates that HAT-P-2b orbital motion is set in the same direction as its parent star spin. The sky-projected angle between the normal of the orbital plane and the stellar spin axis lambda = 0.2(-12.5)(+12.2) is consistent with zero. The planetary and stellar radii were re-determined, yielding R-p = 0.951(- 0.053)(+0.039) R-Jup, R-s = 1.416(-0.062)(+0.040) R-circle dot. The mass (M-p = 8.62(-0.55)(+0.39) M-Jup) and radius of HAT-P-2b indicate a density of 12.5(- 3.6)(+12.6) g cm(-3), suggesting an object in between the known close-in planets with typical density of the order of 1 g cm(-3), and the very low-mass stars, with density greater than 50 g cm(-3).

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 5