Bibliographic Details
| Title: |
The Pan-Pacific Planet Search VI: Giant planets orbiting HD 86950 and HD 222076 |
| Authors: |
Wittenmyer, Robert A., Jones, M. I., Zhao, Jinglin, Marshall, J. P., Butler, R. P., Tinney, C. G., Wang, Liang, Johnson, John Asher |
| Publication Year: |
2016 |
| Collection: |
Astrophysics |
| Subject Terms: |
Astrophysics - Earth and Planetary Astrophysics |
| More Details: |
We report the detection of two new planets orbiting the K giants HD 86950 and HD 222076, based on precise radial velocities obtained with three instruments: AAT/UCLES, FEROS, and CHIRON. HD 86950b has a period of 1270$\pm$57 days at $a=2.72\pm$0.08 AU, and m sin $i=3.6\pm$0.7 Mjup. HD 222076b has $P=871\pm$19 days at $a=1.83\pm$0.03 AU, and m sin $i=1.56\pm$0.11 Mjup. These two giant planets are typical of the population of planets known to orbit evolved stars. In addition, we find a high-amplitude periodic velocity signal ($K\sim$50 m/s) in HD 29399, and show that it is due to stellar variability rather than Keplerian reflex motion. We also investigate the relation between planet occurrence and host-star metallicity for the 164-star Pan-Pacific Planet Search sample of evolved stars. In spite of the small sample of PPPS detections, we confirm the trend of increasing planet occurrence as a function of metallicity found by other studies of planets orbiting evolved stars.
Comment: Accepted for publication in AJ |
| Document Type: |
Working Paper |
| DOI: |
10.3847/1538-3881/153/2/51 |
| Access URL: |
http://arxiv.org/abs/1611.07648 |
| Accession Number: |
edsarx.1611.07648 |
| Database: |
arXiv |
