A Sub-stellar Companion around the F7 V Star HD 8673
Abstract
In order to investigate the dependence of planet formation on stellar mass, we have been monitoring a sample of F-type main-sequence stars with the 2.0 m Alfred-Jensch telescope of the Thüringer Landessternwarte Tautenburg. This survey is based on high-precision radial velocity (RV) measurements using the coudé échelle spectrograph and an iodine absorption cell. We present RV measurements of the F7 V star HD 8673 that show a long-term variability of 1634 days with a semi-amplitude K = 288 m s-1 that can be explained most reasonably by an orbiting sub-stellar companion with a minimum mass of 14.2 M Jup in a high-eccentricity (e = 0.723) Keplerian orbit.
Based on observations obtained at the 2.0-m Alfred-Jensch telescope at the Thüringer Landessternwarte Tautenburg.- Publication:
-
The Astrophysical Journal
- Pub Date:
- July 2010
- DOI:
- Bibcode:
- 2010ApJ...717..348H
- Keywords:
-
- brown dwarfs;
- planetary systems;
- stars: individual: HD 8673;
- stars: low-mass;
- techniques: radial velocities
