A Planetary Companion to the Intermediate-Mass Giant HD 100655
Abstract
A precise radial-velocity survey conducted by a Korean-Japanese planet search program revealed a planetary companion around the intermediate-mass clump giant HD 100655. The radial velocity of the star exhibits a periodic Keplerian variation with a period, semi-amplitude, and eccentricity of 157.57 d, 35.2 m s-1, and 0.085, respectively. Adopting an estimated stellar mass of 2.4M☉, we confirmed the presence of a planetary companion with a semi-major axis of 0.76 AU and a minimum mass of 1.7MJ. The planet is the lowest-mass planet yet discovered around clump giants with masses greater than 1.9M☉.
- Publication:
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Publications of the Astronomical Society of Japan
- Pub Date:
- April 2012
- DOI:
- arXiv:
- arXiv:1111.3746
- Bibcode:
- 2012PASJ...64...34O
- Keywords:
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- stars: individual (HD 100655);
- stars: planetary systems;
- techniques: radial velocities;
- Astrophysics - Earth and Planetary Astrophysics
- E-Print:
- 17 pages, 8 figures, accepted for publication in PASJ