Transiting exoplanets from the CoRoT space mission XVII. The hot Jupiter CoRoT-17b: a very old planet

Abstract

We report on the discovery of a hot Jupiter-type exoplanet, CoRoT-17b, detected by the CoRoT satellite. It has a mass of $2.43\pm 0.30$\Mjup and a radius of $1.02\pm 0.07$\Rjup, while its mean density is $2.82\pm 0.38$ g/cm${}^3$. CoRoT-17b is in a circular orbit with a period of $3.7681\pm 0.0003$ days. The host star is an old ($10.7\pm 1.0$ Gyr) main-sequence star, which makes it an intriguing object for planetary evolution studies. The planet's internal composition is not well constrained and can range from pure H/He to one that can contain $\sim$380 earth masses of heavier elements.

Published (A&A 531, A41, 2011)