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Proceedings Paper

Concept and science of HiCIAO: high contrast instrument for the Subaru next generation adaptive optics
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Paper Abstract

Direct exploration of exoplanets is one of the most exciting topics in astronomy. Our current efforts in this field are concentrated on the Subaru 8.2m telescope at Mauna Kea, Hawaii. Making use of the good observing site and the excellent image quality, the infrared coronagraph CIAO (Coronagraphic Imager with Adaptive Optics) has been used for various kinds of surveys, which is the first dedicated cold coronagraph on the 8-10m class telescopes. However, its contrast is limited by the low-order adaptive optics and a limited suppression of the halo speckle noise. HiCIAO is a new high-contrast instrument for the Subaru telescope. HiCIAO will be used in conjunction with the new adaptive optics system (188 actuators and/or its laser guide star - AO188/LGSAO188) at the Subaru infrared Nasmyth platform. It is designed as a flexible camera comprising several modules that can be configured into different modes of operation. The main modules are the AO module with its future extreme AO capability, the warm coronagraph module, and the cold infrared camera module. HiCIAO can combine coronagraphic techniques with either polarization or spectral simultaneous differential imaging modes. The basic concept of such differential imaging is to split up the image into two or more images, and then use either different planes of polarization or different spectral filter band-passes to produce a signal that distinguishes faint objects near a bright central object from scattered halo or residual speckles. In this contribution, we will outline the HiCIAO instrument, its science, and performance simulations. The optical and mechanical details are described by Hodapp et al. (2006)1. We also present a roadmap of Japanese facilities and future plans, including ASTRO-F (AKARI), SPICA, and JTPF, for extrasolar planet explorations.

Paper Details

Date Published: 28 June 2006
PDF: 9 pages
Proc. SPIE 6269, Ground-based and Airborne Instrumentation for Astronomy, 62690V (28 June 2006); doi: 10.1117/12.670742
Show Author Affiliations
Motohide Tamura, National Astronomical Observatory of Japan (Japan)
Klaus Hodapp, Institute for Astronomy, Univ. of Hawaii (United States)
Hideki Takami, Subaru Telescope (United States)
Lyu Abe, National Astronomical Observatory of Japan (Japan)
Hiroshi Suto, National Astronomical Observatory of Japan (Japan)
Olivier Guyon, Subaru Telescope (United States)
Shane Jacobson, Institute for Astronomy, Univ. of Hawaii (United States)
Ryo Kandori, National Astronomical Observatory of Japan (Japan)
Jun-Ichi Morino, National Astronomical Observatory of Japan (Japan)
Naoshi Murakami, National Astronomical Observatory of Japan (Japan)
Vern Stahlberger, Institute for Astronomy, Univ. of Hawaii (United States)
Ryuji Suzuki, Subaru Telescope (United States)
Alexander Tavrov, National Astronomical Observatory of Japan (Japan)
Tokyo Univ. of Agriculture and Technology (Japan)
Hubert Yamada, Institute for Astronomy, Univ. of Hawaii (United States)
Jun Nishikawa, National Astronomical Observatory of Japan (Japan)
Nobuharu Ukita, National Astronomical Observatory of Japan (Japan)
Jun Hashimoto, National Astronomical Observatory of Japan (Japan)
Hideyuki Izumiura, OAO, National Astronomical Observatory (Japan)
Masahiko Hayashi, Subaru Telescope (United States)
Tadashi Nakajima, National Astronomical Observatory of Japan (Japan)
Tetsuo Nishimura, Subaru Telescope (United States)


Published in SPIE Proceedings Vol. 6269:
Ground-based and Airborne Instrumentation for Astronomy
Ian S. McLean; Masanori Iye, Editor(s)

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