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The most irradiated transiting hot Jupiters are characterized by anomalouslyinflated radii, sometimes exceeding Jupiter's size by more than 60%. Whiledifferent theoretical explanations have been applied, none of them provide auniversal resolution to this observation, despite significant progress in thepast years. We refine the photometric transit light curve analysis of 115Kepler giant planet candidates based on public Q0-Q2 photometry. We find that14% of them are likely false positives, based on their secondary eclipse depth.We report on planet radii vs. stellar flux. We find an increase in planet radiiwith increased stellar irradiation for the Kepler giant planet candidates, ingood agreement with existing hot Jupiter systems. We find that in the case ofmodest irradiation received from the stellar host, giant planets do not haveinflated radii, and appear to have radii independent of the host star incidentflux. This finding suggests that the physical mechanisms inflating hot Jupitersbecome ineffective below a given orbit-averaged stellar irradiation level of ~210^8 erg s^-1 cm^-2.

Lack of Inflated Radii for Kepler Giant Planet Candidates Receiving Modest Stellar Irradiation