A limit on the presence of Earth-mass planets around a Sun-like star

Details A limit on the presence of Earth-mass planets around a Sun-like star A limit on the presence of Earth-mass planets around a Sun-like star

2006-10-05

arxiv.org/abs/astro-ph/0610159v1

Mon.Not.Roy.Astron.Soc.374:941-948,2007

Astronomy and Astrophysics

Astrophysics

Accepted for publication in MNRAS. 16 pages, 9 figures

Scientific paper

10.1111/j.1365-2966.2006.11213.x

We present a combined analysis of all publicly available, visible HST observations of transits of the planet HD 209458b. We derive the times of transit, planet radius, inclination, period, and ephemeris. The transit times are then used to constrain the existence of secondary planets in the system. We show that planets near an Earth mass can be ruled out in low-order mean-motion resonance, while planets less than an Earth mass are ruled out in interior, 2:1 resonance. We also present a combined analysis of the transit times and 68 high precision radial velocity measurements of the system. These results are compared to theoretical predictions for the constraints that can be placed on secondary planets.

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