The SOPHIE search for northern extrasolar planets. II. A multiple planet system around HD 9446
Abstract
We report the discovery of a planetary system around HD 9446, performed from radial velocity measurements secured with the spectrograph SOPHIE at the 193-cm telescope of the Haute-Provence Observatory for more than two years. At least two planets orbit this G5V, active star: HD 9446b has a minimum mass of 0.7 MJup and a slightly eccentric orbit with a period of 30 days, whereas HD 9446c has a minimum mass of 1.8 MJup and a circular orbit with a period of 193 days. As for most of the known multiple planet systems, the HD 9446-system presents a hierarchical disposition with a massive outer planet and a lighter inner planet.
Based on observations collected with the SOPHIE spectrograph on the 1.93-m telescope at Observatoire de Haute-Provence (CNRS), France, by the SOPHIE Consortium (program 07A.PNP.CONS). The full version of Table 1 (SOPHIE measurements of HD 9446) is only available in electronic form at the CDS via anonymous ftp to cdsarc.u-strasbg.fr (130.79.128.5) or via http://cdsweb.u-strasbg.fr/cgi-bin/qcat?J/A+A/513/A69- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- April 2010
- DOI:
- 10.1051/0004-6361/200913790
- arXiv:
- arXiv:1001.0682
- Bibcode:
- 2010A&A...513A..69H
- Keywords:
-
- planetary systems;
- techniques: radial velocities;
- stars: individual: HD 9446;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 7 pages, 6 figures, 3 tables, accepted for publication in A&