The ELODIE survey for northern extra-solar planets II. A Jovian planet on a long-period orbit around GJ 777 A

Details The ELODIE survey for northern extra-solar planets II. A Jovian planet on a long-period orbit around GJ 777 A The ELODIE survey for northern extra-solar planets II. A Jovian planet on a long-period orbit around GJ 777 A

2003-06-27

arxiv.org/abs/astro-ph/0306586v1

Astron.Astrophys.410:1051-1054,2003

Astronomy and Astrophysics

Astrophysics

4 pages, 2 figures, accepted for publication in A&A

Scientific paper

10.1051/0004-6361:20031341

We present radial-velocity measurements obtained with the ELODIE and AFOE spectrographs for GJ 777 A (HD 190360), a metal-rich ([Fe/H]=0.25) nearby (d=15.9 pc) star in a stellar binary system. A long-period low radial-velocity amplitude variation is detected revealing the presence of a Jovian planetary companion. Some of the orbital elements remain weakly constrained because of the smallness of the signal compared to our instrumental precision. The detailed orbital shape is therefore not well established. We present our best fitted orbital solution: an eccentric (e=0.48) 10.7--year orbit. The minimum mass of the companion is 1.33 M_Jup.

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