Comptes Rendus
no. 3-4
Detecting extra-solar planets with the Japanese 3.5 m SPICA space telescope
[Détecter des planètes extra-solaires avec le télescope spatial japonais de 3.5 m SPICA]
Lyu Abe1  ; Keigo Enya2 ; Shinichiro Tanaka2, 3 ; Takao Nakagawa2 ; Hirokazu Kataza2 ; Motohide Tamura1 ; Olivier Guyon4
1 Optical and Infrared Astronomy Division & Extra-solar Planet Project Office, National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka-city, 181-8588 Tokyo Prefecture, Japan
2 Department of Infrared Astrophysics, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Yoshinodai 3-1-1, Sagamihara, Kanagawa 229-8510, Japan
3 Department of Physics, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
4 Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI 96720, USA
Comptes Rendus. Physique, Volume 8 (2007) no. 3-4, pp. 374-384.

Nous présentons le télescope spatial SPICA (SPace Infrared telescope for Cosmology and Astrophysics) dont la date de lancement est prévue aux alentours de 2015 grâce au lanceur japonais HII-A. Nous discutons plus spécifiquement de son utilisation pour la detection et l'observation directe des planètes extra-solaires. Ce télescope refroidi à 4,5 K, avec son miroir monolithique de 3,5 m, est principalement conçu pour observer dans l'infra-rouge moyen et lointain, et jusqu'aux longueurs d'ondes submillimétriques (200 μm). En raison de la faible résolution angulaire à ces longueurs d'ondes, la partie basse du spectre (de 5 à 20 μm) sera utilisée pour l'imagerie à très haute dynamique par coronographie. Cet article décrit le projet du coronographe de SPICA du point de vue des objectifs scientifiques, mais également de nos efforts dans l'étude d'un concept coronographique compatible avec les contraintes imposées par l'architecture du télescope.

We present the 3.5 m SPace Infrared telescope for Cosmology and Astrophysics (SPICA) space telescope, the launch of which is schedule around year 2015 by the Japanese HII-A rocket, and specifically discuss its use in the context of direct observation of extra-solar planets. This actively cooled (4.5 K), single aperture telescope will operate in the mid and far infrared spectral regions, and up to submillimetric wavelengths (200 μm). The lowest spectral region (5 to 20 μm), where the spatial resolution is the most favorable, will be dedicated to high contrast imaging with coronagraphy. This article describes the SPICA coronagraph project in terms of science, as well as our efforts to study a suitable instrumental concept, compatible with the constraints of the telescope architecture.

Publié le :
DOI : 10.1016/j.crhy.2007.02.007
Keywords: Exoplanets, Coronagraphy, Spectroscopy, Space telescope
Mot clés : Exoplanètes, Coronographie, Spectroscopie, Télescope spatial
Lyu Abe 1 ; Keigo Enya 2 ; Shinichiro Tanaka 2, 3 ; Takao Nakagawa 2 ; Hirokazu Kataza 2 ; Motohide Tamura 1 ; Olivier Guyon 4

1 Optical and Infrared Astronomy Division & Extra-solar Planet Project Office, National Astronomical Observatory of Japan, Osawa 2-21-1, Mitaka-city, 181-8588 Tokyo Prefecture, Japan
2 Department of Infrared Astrophysics, Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency, Yoshinodai 3-1-1, Sagamihara, Kanagawa 229-8510, Japan
3 Department of Physics, Graduate School of Science, University of Tokyo, Hongo 7-3-1, Bunkyo-ku, Tokyo 113-0033, Japan
4 Subaru Telescope, National Astronomical Observatory of Japan, 650 North Aohoku Place, Hilo, HI 96720, USA 
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Lyu Abe; Keigo Enya; Shinichiro Tanaka; Takao Nakagawa; Hirokazu Kataza; Motohide Tamura; Olivier Guyon. Detecting extra-solar planets with the Japanese 3.5 m SPICA space telescope. Comptes Rendus. Physique, Volume 8 (2007) no. 3-4, pp. 374-384. doi : 10.1016/j.crhy.2007.02.007. https://comptes-rendus.academie-sciences.fr/physique/articles/10.1016/j.crhy.2007.02.007/

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