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          Institute: MPI für Astronomie     Collection: Publikationen_mpia     Display Documents



ID: 693520.0, MPI für Astronomie / Publikationen_mpia
Precision near-infrared radial velocity instrumentation I: absorption gas cells
Authors:Plavchan, P. P.; Anglada-Escude, G.; White, R.; Gao, P.; Davison, C.; Mills, S.; Beichman, C.; Brinkworth, C.; Johnson, J.; Bottom, M.; Ciardi, D.; Wallace, K.; Mennesson, B.; von Braun, K.; Vasisht, G.; Prato, L.; Kane, S.; Tanner, A.; Walp, B.; Crawford, S.; Lin, S.
Publisher:SPIE
Date of Publication (YYYY-MM-DD):2013
Title of Proceedings:Techniques and Instrumentation for Detection of Exoplanets VI
Start Page:id. 88641J (19 pp)
Volume (in Series):8864
Name of Conference/Meeting:Techniques and Instrumentation for Detection of Exoplanets VI
Audience:Not Specified
Abstract / Description:We have built and commissioned gas absorption cells for precision spectroscopic radial velocity measurements in the near-infrared in the H and K bands. We describe the construction and installation of three such cells filled with 13CH4, 12CH3D, and 14NH3 for the CSHELL spectrograph at the NASA Infrared Telescope Facility (IRTF). We have obtained their high-resolution laboratory Fourier Transform spectra, which can have other practical uses. We summarize the practical details involved in the construction of the three cells, and the thermal and mechanical control. In all cases, the construction of the cells is very affordable. We are carrying out a pilot survey with the 13CH4 methane gas cell on the CSHELL spectrograph at the IRTF to detect exoplanets around low mass and young stars. We discuss the current status of our survey, with the aim of photon-noise limited radial velocity precision. For adequately bright targets, we are able to probe a noise floor of 7 m/s with the gas cell with CSHELL at cassegrain focus. Our results demonstrate the feasibility of using a gas cell on the next generation of near-infrared spectrographs such as iSHELL on IRTF, iGRINS, and an upgraded NIRSPEC at Keck.
Comment of the Author/Creator:Date: 2013, September 1, 2013
External Publication Status:published
Document Type:Conference-Paper
Communicated by:N. N.
Affiliations:MPI für Astronomie
Identifiers:URL:http://cdsads.u-strasbg.fr/abs/2013SPIE.8864E..1JP
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