The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458 | Zendy

T. Mazeh | Zendy; Dominique Naef | Zendy; Guillermo Torres | Zendy; David W. Latham | Zendy; M. Mayor | Zendy; Jean-Luc Beuzit | Zendy; Timothy M. Brown | Zendy; Lars A. Buchhave | Zendy; M. Burnet | Zendy; Bruce W. Carney | Zendy; David Charbonneau | Zendy; G. A. Drukier | Zendy; John B. Laird | Zendy; F. Pepe | Zendy; Christian Perrier | Zendy; D. Queloz | Zendy; N. C. Santos | Zendy; J. P. Sivan | Zendy; S. Udry | Zendy; S. Zucker | Zendy

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The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458

Author(s) -

T. Mazeh,

Dominique Naef,

Guillermo Torres,

David W. Latham,

M. Mayor,

Jean-Luc Beuzit,

Timothy M. Brown,

Lars A. Buchhave,

M. Burnet,

Bruce W. Carney,

David Charbonneau,

G. A. Drukier,

John B. Laird,

F. Pepe,

Christian Perrier,

D. Queloz,

N. C. Santos,

J. P. Sivan,

S. Udry,

S. Zucker

Publication year - 2000

Publication title -

the astrophysical journal

Language(s) - English

Resource type - Journals

SCImago Journal Rank - 2.376

H-Index - 489

eISSN - 1538-4357

pISSN - 0004-637X

DOI - 10.1086/312558

Subject(s) - physics , astrophysics , radius , metallicity , orbit (dynamics) , planet , orbital period , planetary system , transit (satellite) , orbital inclination , absolute magnitude , star (game theory) , orbital eccentricity , effective temperature , circular orbit , orbital elements , stellar mass , astronomy , stars , star formation , binary number , mathematics , public transport , computer security , arithmetic , computer science , law , political science , engineering , aerospace engineering

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&sqbr0;=0.00+/-0.02, M*=1.1+/-0.1 M middle dot in circle, and R*=1.2+/-0.1 R middle dot in circle. 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=86&fdg;1+/-1&fdg;6. 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 rho=0.31+/-0.07 g cm-3.

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