Previous | Session 84 | Next | Author Index | Block Schedule
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.
Previous | Session 84 | Next
Bulletin of the American Astronomical Society, 37 #4
© 2005. The American Astronomical Soceity.