Frontier of Planetary Science Revealed by Terahertz Wave Observations in Deep-space Explorations

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  • KURODA Takeshi
    National Institute of Information and Communications Technology Graduate School of Science, Tohoku University
  • SAGAWA Hideo
    Faculty of Science, Kyoto Sangyo University
  • SEKINE Yasuhito
    School of Science, The University of Tokyo
  • KASAI Yasuko
    National Institute of Information and Communications Technology School of Materials and Chemical Technology, Tokyo Institute of Technology Graduate School of Pure and Applied Sciences, University of Tsukuba
  • HARTOGH Paul
    Max Planck Institute for Solar System Research

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Other Title
  • 深宇宙探査機によるテラヘルツ波帯観測が拓く惑星科学
  • シンウチュウ タンサキ ニ ヨル テラヘルツ ハタイ カンソク ガ ヒラク ワクセイ カガク

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Abstract

<p>Terahertz waves have been utilized for new and/or better understandings of the earth and planetary sciences through observations of atmospheric molecules and the physical properties of surfaces, but applications in the field of planetary science using observations from terahertz instruments on board spacecraft going into deep space are still at the initiation stage. In this review paper, we describe the scientific achievements of Rosetta/MIRO, which was the first terahertz instrument on board a deep-space spacecraft for the observation of the nucleus of comet 67P/Churyumov-Gerasimenko, the expected scientific achievements of JUICE/SWI, which will be launched to observe Jupiter and its icy satellites, and expectations for a future terahertz instrument on a Mars orbiter. Keeping in mind these achievements and expectations, we discuss the expansion of planetary science allowed by the observations made by terahertz instruments on board deep-space spacecraft.</p>

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