Low-amplitude and long-period radial velocity variations in giants HD 3574, 63 Cygni, and HD 216946
Abstract
Aims: We study the low-amplitude and long-period variations in evolved stars using precise radial velocity measurements.
Methods: The high-resolution, fiber-fed Bohyunsan Observatory Echelle Spectrograph (BOES) was used from September 2004 to May 2014 as part of the exoplanet search program at the Bohyunsan Optical Astronomy Observatory (BOAO).
Results: We report the detection of low-amplitude and long-period orbital radial velocity variations in three evolved stars, HD 3574, 63 Cyg, and HD 216946. They have periods of 1061, 982, and 1382 days and semi-amplitudes of 376, 742, and 699 m s-1, respectively.
- Publication:
-
Astronomy and Astrophysics
- Pub Date:
- June 2014
- DOI:
- 10.1051/0004-6361/201321863
- arXiv:
- arXiv:1405.5955
- Bibcode:
- 2014A&A...566A.124L
- Keywords:
-
- brown dwarfs;
- stars: late-type;
- techniques: radial velocities;
- stars: individual: HD 3574;
- stars: individual: 63 Cygni;
- stars: individual: HD 216946;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 6 pages, 7 figures, 4 tables, accepted for publisation in Astronomy &