The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458

Article Article scientifique Lettre The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458 eng 2000 author Mazeh Tsevi 655179 author Naef Dominique Daniel 82389 author Torres Guillermo author Latham David W. author Mayor Michel 24719 author Beuzit Jean-Luc author Brown Timothy M. author Buchhave Lars author Burnet Michel 25519 author Carney Bruce W. author Charbonneau David 811631 author Drukier Gordon A. author Laird John B. author Pepe Francesco Alfonso 124203 author Perrier Christian author Queloz Didier 27139 author Santos Nuno C. author Sivan Jean-Pierre author Udry Stéphane 23409 author Zucker Shay L55-L58 10.1086/312558 2041-8205 http://stacks.iop.org/1538-4357/532/i=1/a=L55 We report a spectroscopic orbit with period P = 3.52433 ± 0.00027 days for the planetary companion that transits the solar-type star HD 209458. For the metallicity, mass, and radius of the star, we derive [Fe/H] = 0.00 ± 0.02, M* = 1.1 ± 0.1 M☉, and R* = 1.2 ± 0.1 R☉. This is based on a new analysis of the iron lines in our HIRES template spectrum and also on the absolute magnitude, effective temperature, and color of the star, and it uses isochrones from four different sets of stellar evolution models. Using these values for the stellar parameters, we reanalyze the transit data and derive an orbital inclination of i = 86fdg1 ± 1fdg6. For the planet, we derive a mass of Mp = 0.69 ± 0.05 MJup, a radius of Rp = 1.40 ± 0.17 RJup, and a density of ρ = 0.31 ± 0.07 g cm⁻³. Dewey 520 26 Département d'astronomie 12 false Astrophysical Journal Letters 532 1 e5e67714-2f58-4946-a584-16dcad811abd Article (Published version) Public Mazeh_2000_ApJ_532_L55.pdf 54333 application/pdf openAccess Faculté des sciences / Département d'astronomie

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The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458	Astrophysical Journal Letters			2000	343	455

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Burnet, Michel