A Doppler Search for Planets around Barnard's Star

Details A Doppler Search for Planets around Barnard's Star A Doppler Search for Planets around Barnard's Star

Jan 2012

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2012aas...21924504c&link_type=abstract

American Astronomical Society, AAS Meeting #219, #245.04

Mathematics

Probability

Scientific paper

Since 1988, we have obtained precise Doppler measurements of Barnard's star at the Lick and Keck Observatories. In particular, there are 199 Keck measurements with a precision of 2.5 m/s from the last 14 years. With this precision and time baseline, we can detect approximately Earth-mass planets for close-in orbits and sub-Jovian-mass planets for orbits of several AU. We have analyzed these Doppler measurements to search for possible signals from planets around Barnard's star. Among the analyses are false alarm probability analysis using periodograms, and a more robust version with Keplerian orbits, which includes orbital eccentricities. We will present the results of this planet-search around Barnard's star and include an assessment of the historic claim for two Jovian planets by Peter van de Kamp.

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