Investigating the planet-metallicity correlation for hot Jupiters
Abstract
We investigate the giant planet-metallicity correlation for a homogeneous, unbiased set of 217 hot Jupiters taken from nearly 15 yr of wide-field ground-based surveys. We compare the host star metallicity to that of field stars using the Besançon Galaxy model, allowing for a metallicity measurement offset between the two sets. We find that hot Jupiters preferentially orbit metal-rich stars. However, we find the correlation consistent, though marginally weaker, for hot Jupiters (β =0.71^{+0.56}_{-0.34}) than it is for other longer period gas giant planets from radial velocity surveys. This suggests that the population of hot Jupiters probably formed in a similar process to other gas giant planets, and differ only in their migration histories.
- Publication:
-
Monthly Notices of the Royal Astronomical Society
- Pub Date:
- January 2020
- DOI:
- 10.1093/mnras/stz3207
- arXiv:
- arXiv:1911.05830
- Bibcode:
- 2020MNRAS.491.4481O
- Keywords:
-
- stars: abundances;
- stars: fundamental parameters;
- planetary systems;
- Astrophysics - Earth and Planetary Astrophysics;
- Astrophysics - Solar and Stellar Astrophysics
- E-Print:
- 8 pages, 4 figures, accepted for publication in MNRAS