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 exoplanets 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 (lambda = 0.9 - 2.5 microns) 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.
@article{arxiv.1208.3190,
title = {Conceptual Design of the Coronagraphic High Angular Resolution Imaging Spectrograph (CHARIS) for the Subaru Telescope},
author = {Mary Anne Peters and Tyler Groff and N. Jeremy Kasdin and Michael W. McElwain and Michael Galvin and Michael A. Carr and Robert Lupton and James E. Gunn and Gillian Knapp and Qian Gong and Alexis Carlotti and Timothy Brandt and Markus Janson and Olivier Guyon and Frantz Martinache and Masahiko Hayashi and Naruhisa Takato},
journal= {arXiv preprint arXiv:1208.3190},
year = {2015}
}