en
Scientific article
Letter
Open access
English

The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458

Published inAstrophysical Journal Letters, vol. 532, no. 1, p. L55-L58
Publication date2000
Abstract

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.

Citation (ISO format)
MAZEH, Tsevi et al. The Spectroscopic Orbit of the Planetary Companion Transiting HD 209458. In: Astrophysical Journal Letters, 2000, vol. 532, n° 1, p. L55–L58. doi: 10.1086/312558
Main files (1)
Article (Published version)
accessLevelPublic
Identifiers
ISSN of the journal2041-8205
260views
120downloads

Technical informations

Creation10/14/2019 3:05:00 PM
First validation10/14/2019 3:05:00 PM
Update time03/15/2023 6:12:38 PM
Status update03/15/2023 6:12:38 PM
Last indexation01/17/2024 6:33:43 AM
All rights reserved by Archive ouverte UNIGE and the University of GenevaunigeBlack