Volume 407, Number 2, August IV 2003
|Page(s)||679 - 684|
|Section||Stellar structure and evolution|
|Published online||17 November 2003|
The CORALIE survey for southern extra-solar planets*
X. A Hot Jupiter orbiting HD 73256
Observatoire de Genève, 51 ch. des Maillettes, 1290 Sauverny, Switzerland
2 Niels Bohr Institute for Astronomy, Physics and Geophysics; Astronomical Observatory, Juliane Maries Vej 30, 2100 Copenhagen Ø, Denmark
3 Royal Observatory of Belgium, Ringlaan 3, 1180 Brussel and Vrije Universiteit Brussel, Pleinlaan 2, 1050 Brussels, Belgium
4 Centro de Astronomia e Astrofísica da Universidade de Lisboa, Observatório Astronómico de Lisboa, Tapada da Ajuda, 1349-018 Lisboa, Portugal
Corresponding author: S. Udry, firstname.lastname@example.org
Accepted: 27 May 2003
Recent radial-velocity measurements obtained with the CORALIE spectrograph on the 1.2-m Euler Swiss telescope at La Silla unveil the presence of a new Jovian-mass Hot Jupiter around HD 73256. The 1.85-MJup planet moves on an extremely short-period (P = 2.5486 d), quasi-circular orbit. The best Keplerian orbital solution is presented together with an unsuccessful photometric planetary-transit search performed with the SAT Danish telescope at La Silla. Over the time span of the observations, the photometric follow-up of the candidate has nevertheless revealed a -d photometric periodicity corresponding to the rotational period of the star. This variation as well as the radial-velocity jitter around the Keplerian solution are shown to be related to the fair activity level known for HD 73256.
Key words: techniques: radial velocities / techniques: photometric / stars: binaries: spectroscopic / stars: individual: HD 73256 / stars: activity / stars: planetary systems
© ESO, 2003
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