The CORALIE survey for southern extra-solar planets. X. A Hot Jupiter orbiting HD73256

Details The CORALIE survey for southern extra-solar planets. X. A Hot Jupiter orbiting HD73256 The CORALIE survey for southern extra-solar planets. X. A Hot Jupiter orbiting HD73256

2003-04-14

arxiv.org/abs/astro-ph/0304248v2

Astron.Astrophys. 407 (2003) 679-684

Astronomy and Astrophysics

Astrophysics

7 pages, 7 figures. Accepted in A&A

Scientific paper

10.1051/0004-6361:20030815

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-M_Jup 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 P=14-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.

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