Impact of Stellar Dynamics on the Frequency of Giant Planets in Close Binaries

Hostile tidal forces may inhibit the formation of Jovian planets in binarieswith semimajor axes of $\la$$50\au$, binaries that might be called ``close'' inthis context. As an alternative to in situ planet formation, a binary canacquire a giant planet when one of its original members is replaced in adynamical interaction with another star that hosts a planet. Simple scalingrelations for the structure and evolution of star clusters, coupled withanalytic arguments regarding binary-single and binary-binary scattering,indicate that dynamical processes can deposit Jovian planets in $<$1% of closebinaries. If ongoing and future exoplanet surveys measure a much largerfraction, it may be that giant planets do somehow form frequently in suchsystems.Comment: 4 pages; Accepted by ApJ, minor changes from origina