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Transit (TR) surveys for extrasolar planets have recently uncovered apopulation of ``very hot Jupiters,'' planets with orbital periods of P< 3 d. Atfirst sight this may seem surprising, given that radial velocity (RV) surveyshave found a dearth of such planets, despite the fact that their sensitivityincreases with decreasing P. We examine the confrontation between RV and TRsurvey results, paying particular attention to selection biases that favorshort-period planets in transit surveys. We demonstrate that, when such biasesand small-number statistics are properly taken into account, the perioddistribution of planets found by RV and TR surveys are consistent at betterthan the 1-sigma level. This consistency holds for a large range of reasonableassumptions. In other words, there are not enough planets detected to robustlyconclude that the RV and TR short-period planet results are inconsistent.Assuming a logarithmic distribution of periods, we find that the relativefrequency of very hot Jupiters (VHJ: P=1-3 d) to hot Jupiters (HJ: P=3-9 d) is10-20%. Given an absolute frequency of HJ of ~1%, this implies thatapproximately one star in ~500-1000 has a VHJ. We also note that VHJ and HJappear to be distinct in terms of their upper mass limit. We discuss theimplications of our results for planetary migration theories, as well aspresent and future TR and RV surveys.Comment: 11 pages, 4 figures, 2 tables. Minor changes. Accepted to ApJ, to  appear in the April 20, 2005 issue (v623

On the Period Distribution of Close‐in Extrasolar Giant Planets