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arXiv · 1911.05830

Investigating the Planet-Metallicity Correlation for Hot Jupiters

Ares Osborn·Daniel Bayliss
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Abstract

We investigate the giant planet-metallicity correlation for a homogeneous, unbiased set of 217 hot Jupiters taken from nearly 15 years 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.

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Ares Osborn, Daniel Bayliss. 2019-11-13. Investigating the Planet-Metallicity Correlation for Hot Jupiters. https://doi.org/10.1093/mnras%2Fstz3207

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