The Tautenburg radial velocity survey for extrasolar planets

Details The Tautenburg radial velocity survey for extrasolar planets The Tautenburg radial velocity survey for extrasolar planets

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003eaeja.....6093h&link_type=abstract

EGS - AGU - EUG Joint Assembly, Abstracts from the meeting held in Nice, France, 6 - 11 April 2003, abstract #6093

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Currently there are several programs detecting extrasolar planets indirectly by means of precise stellar radial-velocity measurements. Most of these surveys however are strongly biased towards inactive, predominantly single (or in wide binary pairs), solar-like stars. From the current data it is thus quite difficult to deduce which properties of the stars influence the formation the planets. In 2001 we started a radial-velocity survey using the 2-m-Alfred-Jensch-telescope of the Thüringer Landessternwarte Tautenburg (TLS). The TLS survey differs from others in that its program sample consists of classes of stars ignored by current surveys. These include binary stars, young active stars, and earlier F-type stars. Each class of stars should answer specific questions about the process of planet formation. Planet searches around binary stars will yield clues about the relationship between planet and binary star formation. What are the characteristics of planets as a function of binary orbital period? Are there circumbinary planets. Does the binary star process help or hinder the process of planets formation? It expected that migration and the dynamical evolution of extrasolar planets are important. Searching for extrasolar planets around young stars provides observational data for these theoretical studies. Finally, the host stars of known extrasolar planets have a slightly higher metal abundance. To probe the relationship between metallicity and planet formation we have been surveying a sample of super metal rich stars. Preliminary results from our program will be presented.

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