Extrasolar planets and brown dwarfs around A-F type stars
Open Access
- 21 October 2005
- journal article
- Published by EDP Sciences in Astronomy & Astrophysics
- Vol. 443 (1) , 337-345
- https://doi.org/10.1051/0004-6361:20052938
Abstract
International audienceWe present the performances of a radial velocity measurement method that we developed for A-F type stars. These perfomances are evaluated through an extensive set of simulations, together with actual radial velocity observations of such stars using the ELODIE and HARPS spectrographs. We report the case of stars constant in radial velocity, the example of a binary detection on HD 48097 (an A2V star, with v sin{i} equal to 90 km s^-1) and a confirmation of the existence of a 3.9 M_Jup planet orbiting around HD 120136 (Tau Boo). The instability strip problem is also discussed. We show that with this method, it is in principle possible to detect planets and brown dwarfs around A-F type stars, thus allowing further study of the impact of stellar masses on planetary system formation over a wider range of stellar masses than is currently doneKeywords
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