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Session 70 - Searching for Other Planetary Systems.
Display session, Wednesday, January 17
North Banquet Hall, Convention Center

[70.09] Stellar Radial Velocities at a Precision of 3 m/s

R. P. Butler, G. W. Marcy (UC Berkeley, San Francisco State U.)

Some results are presented from the Lick Observatory precision velocity search for extrasolar planets. We have been surveying 120 stars over the last 8 years at a precision of 15 m/s. This sample includes main sequence dwarf stars from spectral classes F5 to M3.

In November of 1994 the Schmidt camera optics on the "Hamilton" spectograph at Lick Observatory were upgraded. This has increased the intrinsic resolution of the "Hamilton" from 40,000 to 120,000. As a result of this, radial velocity errors have been reduced to 3 m/s over the last year. In contrast, Jupiter causes the Sun to wobble with an amplitude of 13 m/s.

Program listing for Wednesday