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Current status of the coronagraphic mode for the 3.5m SPICA space telscope

Published online by Cambridge University Press:  02 May 2006

L. Abe ,
M. Tamura ,
T. Nakagawa ,
K. Enya ,
S. Tanaka ,
K. Fujita ,
J. Nishikawa ,
N. Murakami  and
H. Kataza
L. Abe
Affiliation:
Infrared and Optical Astronomy Division & Extrasolar Planet Project Office, National Astronomical Observatory of Japan, Ōsawa 2-21-1, Mitaka-city, 181-8588 Tōkyō, Japan contact email: abe@optik.mtk.nao.ac.jp
M. Tamura
Affiliation:
Infrared and Optical Astronomy Division & Extrasolar Planet Project Office, National Astronomical Observatory of Japan, Ōsawa 2-21-1, Mitaka-city, 181-8588 Tōkyō, Japan contact email: abe@optik.mtk.nao.ac.jp
T. Nakagawa
Affiliation:
Department of Infrared Astrophysics, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency Yoshinodai 3-1-1, Sagamihara, Kanagawa, 229-8510, Japan, contact email: enya@ir.isas.jaxa.jp
K. Enya
Affiliation:
Department of Infrared Astrophysics, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency Yoshinodai 3-1-1, Sagamihara, Kanagawa, 229-8510, Japan, contact email: enya@ir.isas.jaxa.jp
S. Tanaka
Affiliation:
Department of Infrared Astrophysics, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency Yoshinodai 3-1-1, Sagamihara, Kanagawa, 229-8510, Japan, contact email: enya@ir.isas.jaxa.jp
K. Fujita
Affiliation:
Graduate School of Science & Technology, Kobe University, Nada Kobe 657-8501 Japan
J. Nishikawa
Affiliation:
MIRA Project, National Astronomical Observatory of Japan, Ōsawa 2-21-1, Mitaka-city, 181-8588 Tōkyō, Japan
N. Murakami
Affiliation:
MIRA Project, National Astronomical Observatory of Japan, Ōsawa 2-21-1, Mitaka-city, 181-8588 Tōkyō, Japan
H. Kataza
Affiliation:
Department of Infrared Astrophysics, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency Yoshinodai 3-1-1, Sagamihara, Kanagawa, 229-8510, Japan, contact email: enya@ir.isas.jaxa.jp
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Abstract

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As of early $\sim$2010's, the Japanese SPace Infrared telescope for Cosmology and Astrophysics (SPICA) space observatory will be launched. This actively cooled, cryogenic (4.5K), 3.5m telescope will operate in the mid and far infrared spectral regions. With its very high sensitivity, one of SPICA's aims will be the direct detection and characterization of extra-solar outer planets of nearby stars. The goal contrast ranges from $10^5$ to $10^6$ up to an angular separation of ${\sim}5$ arcsec. The relatively low angular resolution at MIR (5 to 20 $\mu$m) requires an efficient and robust coronagraphic mode working at cryogenic temperatures. In this presentation we describe several envisaged preliminary designs and assess their performance against the science goals and host telescope specifications. These are compared against numerical simulations and instrumental environment considerations, such as the need for an actively corrected wavefront.

Keywords

Instrumentation: adaptive opticsInstrumentation: high angular resolutionTechnique: high angular resolutionTelescopes
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 1 , Colloquium C200: Direct Imaging of Exoplanets: Science & Techniques , October 2005 , pp. 329 - 334
Copyright
© 2006 International Astronomical Union