The planet search program of the Thüringer Landessternwarte Tautenburg: searching for extrasolar planets from deep in the heart of Germany

Details The planet search program of the Thüringer Landessternwarte Tautenburg: searching for extrasolar planets from deep in the heart of Germany The planet search program of the Thüringer Landessternwarte Tautenburg: searching for extrasolar planets from deep in the heart of Germany

Oct 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003esasp.539..441h&link_type=abstract

In: Proceedings of the Conference on Towards Other Earths: DARWIN/TPF and the Search for Extrasolar Terrestrial Planets, 22-25 A

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Extrasolar Planets, Brown Dwarfs, Radial Velocity Measurements

Scientific paper

In 2001 the Thüringer Landessternwarte Tautenburg (TLS) started a program to search for extrasolar planets using precise stellar radial velocity measurements among a diverse class of stars (e.g. young stars, binary systems, metal rich stars). Precise radial velocity measurements are made using the high resolution coude echelle spectrograph of the Alfred-Jensch 2m telescope and an iodine absorption cell. To date this program is capable of achieving a best RV precision of 3 m s-1 and a mean RV precision of 12 m s-1. About 40% of our sample shows rms scatter less than 10 m s-1. Part of our program is devoted to independent confirmation of extrasolar planet discoveries. Our RV measurements confirm the extrasolar planet in a 118 day period around HD 52265 first reported by Butler et al. The TLS measurements for HD 217107 confirm the 7-day period planet found by Fischer et al., but we cannot confirm the large linear trend seen in their data taken at Keck Observatory. The TLS program has also found a candidate brown dwarf (M sin i ~ 20 MJupiter) in an eccentric orbit.

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