Precise infrared radial velocimetry with the Triplespec Exoplanet Discovery Instrument: current performance and results | Zendy

Philip S. Muirhead | Zendy; Jerry Edelstein | Zendy; Jason T. Wright | Zendy; David J. Erskine | Zendy; Matthew W. Muterspaugh | Zendy; Kevin R. Covey | Zendy; Mario Marckwordt | Zendy; Samuel Halverson | Zendy; Daniel Mondo | Zendy; James P. Lloyd | Zendy

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

Author(s) -

Philip S. Muirhead,

Jerry Edelstein,

Jason T. Wright,

David J. Erskine,

Matthew W. Muterspaugh,

Kevin R. Covey,

Mario Marckwordt,

Samuel Halverson,

Daniel Mondo,

James P. Lloyd

Publication year - 2010

Publication title -

proceedings of spie, the international society for optical engineering/proceedings of spie

Language(s) - English

Resource type - Conference proceedings

SCImago Journal Rank - 0.192

H-Index - 176

eISSN - 1996-756X

pISSN - 0277-786X

DOI - 10.1117/12.857196

Subject(s) - exoplanet , starlight , spectrograph , physics , interferometry , michelson interferometer , optics , cassegrain reflector , planet , near infrared spectroscopy , radial velocity , telescope , astronomy , remote sensing , geology , stars , spectral line

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.

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