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High stable spectrograph for characterization of transiting Earth-like exoplanets

Research Project

Project/Area Number 16H02164
Research Category

Grant-in-Aid for Scientific Research (A)

Allocation TypeSingle-year Grants
Section一般
Research Field Astronomy
Research InstitutionOsaka University

Principal Investigator

Matsuo Taro  大阪大学, 理学研究科, 助教 (00548464)

Co-Investigator(Kenkyū-buntansha) 芝井 広  大阪大学, 理学研究科, 教授 (70154234)
住 貴宏  大阪大学, 理学研究科, 教授 (30432214)
Project Period (FY) 2016-04-01 – 2019-03-31
Project Status Completed (Fiscal Year 2018)
Budget Amount *help
¥37,180,000 (Direct Cost: ¥28,600,000、Indirect Cost: ¥8,580,000)
Fiscal Year 2018: ¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2017: ¥15,860,000 (Direct Cost: ¥12,200,000、Indirect Cost: ¥3,660,000)
Fiscal Year 2016: ¥18,590,000 (Direct Cost: ¥14,300,000、Indirect Cost: ¥4,290,000)
Keywords地球型系外惑星 / 高精度分光測光器 / 中間赤外線 / 検出器 / 極低温 / 太陽系外惑星 / 高精度分光測光 / 地球型系外惑星の分光観測 / 高安定分光器 / 宇宙望遠鏡 / 光学赤外線天文学 / 応用光学・量子光工学 / 超高精度分光測光 / 赤外線 / 分光測光の観測技術
Outline of Final Research Achievements

Finding and characterizing the atmospheres of habitable planets orbiting nearby stars is one of the most important scientific goals for observations that will be developed in the 2020s and 2030s. Near- and mid-infrared (IR) spectral features of H2O, CH4, O3, CO2, and other molecule species in the atmospheres of Earth-like planets are expected to have amplitudes of only ~10 parts-per-million (ppm) in transmission or emission spectra when transiting late M-dwarf stars. Here, we proposed a new instrument concept for characterizing transiting Earth-like planets around nearby late-type stars. This concept was named as densified pupil spectrograph. We successfully developed a cryogenic densified pupil testbed optimized for transit observation in mid-infrared wavelength. In addition, this concept was adopted by the future large space mission concept, Origins Space Telescope, and was described as a baseline instrument in the OST proposal for submission to US 2020 decadal survey.

Academic Significance and Societal Importance of the Research Achievements

本研究は、中間赤外線での地球型系外惑星の分光観測に新しい道を切り拓くものである。中間赤外線には、オゾンやメタンといった地球生命が光合成や代謝によって生成される分子の吸収線が存在する。したがって、系外惑星の大気の非平衡性を分光観測において調査することで、生命の存在有無を推定することが可能になる。本研究において、中間赤外線での生命探査を実現する新しい装置概念を創案し、その試験機の開発に成功した。本研究において開発された技術が基盤となり、人類が長年抱いてきた「宇宙における生命の可能性」という究極的な課題に挑むことが期待される。

Report

(4 results)
  • 2018 Annual Research Report   Final Research Report ( PDF )
  • 2017 Annual Research Report
  • 2016 Annual Research Report
  • Research Products

    (10 results)

All 2018 2017 2016 Other

All Int'l Joint Research (3 results) Journal Article (4 results) (of which Int'l Joint Research: 2 results,  Peer Reviewed: 3 results,  Open Access: 1 results) Presentation (3 results) (of which Int'l Joint Research: 1 results,  Invited: 1 results)

  • [Int'l Joint Research] NASA Ames Research Center/NASA Goddard Space Flight Center(米国)

    • Related Report
      2018 Annual Research Report
  • [Int'l Joint Research] NASA Ames Research Center/NASA Goddard Space Flight Center(米国)

    • Related Report
      2017 Annual Research Report
  • [Int'l Joint Research] University College London/University of Cardiff(英国)

    • Related Report
      2016 Annual Research Report
  • [Journal Article] A highly stable spectrophotometric capability for the Origins Space Telescope (OST) mid-infrared imager, spectrometer, coronagraph (MISC)2018

    • Author(s)
      T. Matsuo, T. Greene, T. Roellig et al.
    • Journal Title

      Proceedings of SPIE

      Volume: 10698 Pages: 1-12

    • DOI

      10.1117/12.2311896

    • Related Report
      2018 Annual Research Report
    • Int'l Joint Research
  • [Journal Article] A New Method for Calibration of Gain Variation in a Detector System2018

    • Author(s)
      S. Goda, T. Matsuo
    • Journal Title

      Astronomical Journal

      Volume: 156 Issue: 6 Pages: 288-288

    • DOI

      10.3847/1538-3881/aaeb29

    • Related Report
      2018 Annual Research Report
    • Peer Reviewed
  • [Journal Article] Pupil Masks for Spectrophotometry of Transiting Exoplanets2017

    • Author(s)
      Itoh Satoshi、Matsuo Taro、Goda Shohei、Shibai Hiroshi、Sumi Takahiro
    • Journal Title

      The Astronomical Journal

      Volume: 154 Issue: 3 Pages: 97-97

    • DOI

      10.3847/1538-3881/aa8304

    • Related Report
      2017 Annual Research Report
    • Peer Reviewed / Open Access / Int'l Joint Research
  • [Journal Article] A New Concept for Spectrophotometry of Exoplanets with Space-borne Telescopes2016

    • Author(s)
      Matsuo, T. Itoh, S. Shibai, H. Sumi, T. Yamamuro, T
    • Journal Title

      Astrophysical Journal

      Volume: 823 Issue: 2 Pages: 1-12

    • DOI

      10.3847/0004-637x/823/2/139

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed
  • [Presentation] 高精度測光分光のための集積回路における長期的な信号変動の補正方式2018

    • Author(s)
      合田翔平、松尾太郎、井戸雅之、伊藤哲史、芝井広、住貴宏、山室智康
    • Organizer
      日本天文学会2018年春季年会
    • Related Report
      2017 Annual Research Report
  • [Presentation] 地球型系外惑星大気分光に向けた高安定分光器の基礎研究2016

    • Author(s)
      伊藤智司、松尾太郎、芝井広、住貴宏
    • Organizer
      天文学会
    • Related Report
      2016 Annual Research Report
  • [Presentation] A concept for transit spectroscopy and its potential application to future space telescopes2016

    • Author(s)
      Matsuo, T. Itoh, S. Shibai, H. Sumi, T. Yamamuro, T
    • Organizer
      ARIEL Space Mission Conference
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited

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Published: 2016-04-21   Modified: 2022-08-29  

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