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Proceedings Paper

Precise infrared radial velocimetry with the Triplespec Exoplanet Discovery Instrument: current performance and results
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Paper Abstract

The TripleSpec Exoplanet Discovery Instrument (TEDI) is optimized to detect extrasolar planets orbiting midto- late M dwarfs using the Doppler technique at infrared wavelengths. TEDI is the combination of a Michelson interferometer and a moderate-resolution near-infrared spectrograph, TripleSpec, mounted on the Cassegrain focus of the Palomar 200-inch Hale Telescope. Here we present results from observations of a radial velocity standard star and a laboratory source over the past year. Our results indicate that focus effects within the interferometer, combined with non-common-path errors between the ThAr calibration source and starlight, limit our performance to several 100 m/s. An upgraded version of TEDI, TEDI 2.0, will eliminate this behavior by mixing ThAr with starlight in a scrambled fiber before a redesigned interferometer with minimal focal effects.

Paper Details

Date Published: 20 July 2010
PDF: 8 pages
Proc. SPIE 7735, Ground-based and Airborne Instrumentation for Astronomy III, 77357X (20 July 2010); doi: 10.1117/12.857196
Show Author Affiliations
Philip S. Muirhead, Cornell Univ. (United States)
Jerry Edelstein, Univ. of California, Berkeley (United States)
Jason T. Wright, The Pennsylvania State Univ. (United States)
David J. Erskine, Lawrence Livermore National Lab. (United States)
Matthew W. Muterspaugh, Tennessee State Univ. (United States)
Kevin R. Covey, Cornell Univ. (United States)
Mario R. Marckwordt, Univ. of California, Berkeley (United States)
Samuel Halverson, Univ. of California, Berkeley (United States)
Daniel Mondo, Univ. of California, Berkeley (United States)
James P. Lloyd, Cornell Univ. (United States)

Published in SPIE Proceedings Vol. 7735:
Ground-based and Airborne Instrumentation for Astronomy III
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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