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Proceedings Paper

Conceptual design of the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) for the Subaru telescope
Author(s): Mary Anne Peters; Tyler Groff; N. Jeremy Kasdin; Michael W. McElwain; Michael Galvin; Michael A. Carr; Robert Lupton; James E. Gunn; Gillian Knapp; Qian Gong; Alexis Carlotti; Timothy Brandt; Markus Janson; Olivier Guyon; Frantz Martinache; Masahiko Hayashi; Naruhisa Takato
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Paper Abstract

Recent developments in high-contrast imaging techniques now make possible both imaging and spectroscopy of planets around nearby stars. We present the conceptual design of the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS), a lenslet-based, cryogenic integral field spectrograph (IFS) for imaging exo-planets on the Subaru telescope. The IFS will provide spectral information for 140x140 spatial elements over a 1.75 arcsecs x 1.75 arcsecs field of view (FOV). CHARIS will operate in the near infrared (λ = 0.9-2.5μm) and provide a spectral resolution of R = 14, 33, and 65 in three separate observing modes. Taking advantage of the adaptive optics systems and advanced coronagraphs (AO188 and SCExAO) on the Subaru telescope, CHARIS will provide sufficient contrast to obtain spectra of young self-luminous Jupiter-mass exoplanets. CHARIS is in the early design phases and is projected to have first light by the end of 2015. We report here on the current conceptual design of CHARIS and the design challenges.

Paper Details

Date Published: 24 September 2012
PDF: 11 pages
Proc. SPIE 8446, Ground-based and Airborne Instrumentation for Astronomy IV, 84467U (24 September 2012); doi: 10.1117/12.926381
Show Author Affiliations
Mary Anne Peters, Princeton Univ. (United States)
Tyler Groff, Princeton Univ. (United States)
N. Jeremy Kasdin, Princeton Univ. (United States)
Michael W. McElwain, NASA Goddard Space Flight Ctr. (United States)
Michael Galvin, Princeton Univ. (United States)
Michael A. Carr, Princeton Univ. (United States)
Robert Lupton, Princeton Univ. (United States)
James E. Gunn, Princeton Univ. (United States)
Gillian Knapp, Princeton Univ. (United States)
Qian Gong, NASA Goddard Space Flight Ctr. (United States)
Alexis Carlotti, Princeton Univ. (United States)
Timothy Brandt, Princeton Univ. (United States)
Markus Janson, Princeton Univ. (United States)
Olivier Guyon, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Frantz Martinache, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Masahiko Hayashi, Subaru Telescope, National Astronomical Observatory of Japan (United States)
Naruhisa Takato, Subaru Telescope, National Astronomical Observatory of Japan (United States)


Published in SPIE Proceedings Vol. 8446:
Ground-based and Airborne Instrumentation for Astronomy IV
Ian S. McLean; Suzanne K. Ramsay; Hideki Takami, Editor(s)

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