AAS 207th Meeting, 8-12 January 2006
Session 84 Planets in Binary Star Systems
Special Session, Tuesday, 10:00-11:30am, January 10, 2006, Maryland

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[84.02] The Radial Velocity Search for Extrasolar Planets in Binary and Multiple Stellar Systems

M. Konacki (Nicolaus Copernicus Astronomical Center, Polish Academy of Sciences)

A spectroscopic technique employing an iodine absorption cell (I2) to superimpose a reference spectrum onto a stellar spectrum is currently the most widely adopted approach to obtain precision radial velocities (RVs) of solar-type stars. Yet in its original version, it only allows us to measure precise RVs of single stars. I will present a novel method employing an I2 absorption cell that enables us to accurately determine radial velocities of both components of double-lined binaries. The data from the Keck I telescope and HIRES spectrograph demonstrate that ~20 m/s radial velocity precision can be routinely obtained for ``early" type double-lined binaries (F3-F8). For later type binaries, the precision reaches ~10 m/s. I will discuss my ongoing search for extrasolar planets in multiple stellar systems and the recent detection of a hot Jupiter in a close triple-star system HD188753.

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