Astronomy and Astrophysics – Astronomy
Scientific paper
Dec 2005
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.8402k&link_type=abstract
American Astronomical Society Meeting 207, #84.02; Bulletin of the American Astronomical Society, Vol. 37, p.1310
Astronomy and Astrophysics
Astronomy
Scientific paper
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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