The Frequency of Hot Jupiters Orbiting Nearby Solar-Type Stars

TL;DR

This paper estimates the occurrence rate of hot Jupiters around nearby solar-type stars using radial velocity data, finding a rate of about 1.2%, and discusses the challenges in comparing different detection methods.

Contribution

It provides a new estimate of hot Jupiter frequency in the Solar Neighborhood and analyzes the consistency and differences with other surveys and detection techniques.

Findings

Hot Jupiter occurrence rate is approximately 1.2%.

Results are consistent with some radial velocity surveys.

Differences with transit surveys are marginally significant.

Abstract

We determine the fraction of F, G, and K dwarfs in the Solar Neighborhood hosting hot jupiters as measured by the California Planet Survey from the Lick and Keck planet searches. We find the rate to be 1.2\pm0.38%, which is consistent with the rate reported by Mayor et al. (2011) from the HARPS and CORALIE radial velocity surveys. These numbers are more than double the rate reported by Howard et al. (2011) for Kepler stars and the rate of Gould et al. (2006) from the OGLE-III transit search, however due to small number statistics these differences are of only marginal statistical significance. We explore some of the difficulties in estimating this rate from the existing radial velocity data sets and comparing radial velocity rates to rates from other techniques.