| Title: |
THE PAN-PACIFIC PLANET SEARCH. VI. GIANT PLANETS ORBITING HD 86950 and HD 222076 |
| Authors: |
Wittenmyer, RA; Jones, MI; Zhao, J; Marshall, JP; Butler, RP; Tinney, CG; Wang, L; Johnson, JA |
| Source: |
urn:ISSN:0004-6256 ; urn:ISSN:1538-3881 ; Astronomical Journal, 153, 2, 51 |
| Publisher Information: |
American Astronomical Society |
| Publication Year: |
2017 |
| Collection: |
UNSW Sydney (The University of New South Wales): UNSWorks |
| Subject Terms: |
5109 Space Sciences; 51 Physical Sciences; 5101 Astronomical Sciences; anzsrc-for: 5109 Space Sciences; anzsrc-for: 51 Physical Sciences; anzsrc-for: 5101 Astronomical Sciences; anzsrc-for: 0201 Astronomical and Space Sciences; anzsrc-for: 5107 Particle and high energy physics |
| Description: |
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 ± 57 days at a = 2.72 ± 0.08 au, and m sin i = 3.6 ± 0.7 M jup . HD 222076b has P = 871 ± 19 days at a = 1.83 ± 0.03 au, and m sin i = 1.56 ± 0.11 M Jup . 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 ∼ 50 m s -1 ) 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 (PPPS) 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. |
| Document Type: |
article in journal/newspaper |
| Language: |
unknown |
| Relation: |
http://purl.org/au-research/grants/arc/DP130102695; https://hdl.handle.net/1959.4/unsworks_50816 |
| DOI: |
10.3847/1538-3881/153/2/51 |
| Availability: |
https://hdl.handle.net/1959.4/unsworks_50816; https://doi.org/10.3847/1538-3881/153/2/51 |
| Rights: |
metadata only access ; http://purl.org/coar/access_right/c_14cb ; CC-BY-NC-ND ; https://creativecommons.org/licenses/by-nc-nd/4.0/ |
| Accession Number: |
edsbas.F00325A0 |
| Database: |
BASE |