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Developing Remote Sensing Methods for Characterization of Exoplanets

Research Project

Project/Area Number 25800106
Research Category

Grant-in-Aid for Young Scientists (B)

Allocation TypeMulti-year Fund
Research Field Astronomy
Research InstitutionThe University of Tokyo

Principal Investigator

Kawahara Hajime  東京大学, 大学院理学系研究科(理学部), 助教 (90649758)

Project Period (FY) 2013-04-01 – 2017-03-31
Project Status Completed (Fiscal Year 2016)
Budget Amount *help
¥4,030,000 (Direct Cost: ¥3,100,000、Indirect Cost: ¥930,000)
Fiscal Year 2016: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2015: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2014: ¥780,000 (Direct Cost: ¥600,000、Indirect Cost: ¥180,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Keywords太陽系外惑星 / キャラクタリゼーション / 直接撮像 / トランジット惑星 / 長周期惑星 / 雪線 / 系外惑星キャラクタリゼーション / ケプラー衛星 / 地球型惑星 / 高分散分光 / 惑星大気 / 宇宙生物学 / 天文光学 / 系外惑星大気 / コロナグラフ / 高コントラスト装置 / 大気散逸 / 恒星惑星相互作用
Outline of Final Research Achievements

Recently, many Earth-sized planets have been reported. However, how do we characterize these planets or constrain the planet formation theory or approach bio-phenomena at the planets? In this research, we developed the methodology for the remote-sensing of the exoplanets. We constructed the method to estimate the obliquity by the photometric variation of the directly imaged planets. We also propose a new concept of the instruments, which combine a coronagraph with a high dispersion spectrograph. So far, it has been considered that the long-period planets are difficult to be characterized. We developed a novel method to detect them and detected seven long period planets in Kepler data.

Report

(5 results)
  • 2016 Annual Research Report   Final Research Report ( PDF )
  • 2015 Research-status Report
  • 2014 Research-status Report
  • 2013 Research-status Report
  • Research Products

    (26 results)

All 2017 2016 2015 2014 2013 Other

All Journal Article (15 results) (of which Int'l Joint Research: 4 results,  Peer Reviewed: 15 results,  Acknowledgement Compliant: 10 results,  Open Access: 1 results) Presentation (11 results) (of which Int'l Joint Research: 1 results,  Invited: 6 results)

  • [Journal Article] Suzaku observations of the merging galaxy cluster Abell2255: The northeast radio relic2017

    • Author(s)
      H. Akamatsu, M. Mizuno, N. Ota, Y.-Y. Zhang, R. J. van Weeren, H. Kawahara, Y. Fukazawa, J. S. Kaastra, M. Kawaharada, K. Nakazawa, T. Ohashi, H.J.A. Rottgering, M. Takizawa, J. Vink, F. Zandanel
    • Journal Title

      Astronomy and Astrophysics

      Volume: 600 Pages: 100-100

    • DOI

      10.1051/0004-6361/201628400

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Int'l Joint Research
  • [Journal Article] Masataka Aizawa, Sho Uehara, Kento Masuda, Hajime Kawahara, Yasushi Suto2017

    • Author(s)
      Towards Detection of Exoplanetary Rings Via Transit Photometry: Methodology and a Possible Candidate
    • Journal Title

      Astronomical Journal

      Volume: 印刷中

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Transiting Planet Candidates Beyond the Snow Line Detected by Visual Inspection of 7557 Kepler Objects of Interest2016

    • Author(s)
      Uehara, S., Kawahara, H., Masuda, K., Yamada, S., Aizawa, M.
    • Journal Title

      The Astrophysical Journal

      Volume: 822 Issue: 1 Pages: 2-2

    • DOI

      10.3847/0004-637x/822/1/2

    • Related Report
      2016 Annual Research Report 2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Frequency Modulation of Directly Imaged Exoplanets: Geometric Effect as a Probe of Planetary Obliquity2016

    • Author(s)
      Hajime Kawahara
    • Journal Title

      Astrophysical Journal

      Volume: 822 Issue: 2 Pages: 112-112

    • DOI

      10.3847/0004-637x/822/2/112

    • Related Report
      2016 Annual Research Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Frequency Modulation ofDirectly Imaged Exoplanets: Geometric Effect as a Probe of Planetary Obliquity2016

    • Author(s)
      Hajime Kawahara
    • Journal Title

      Astrophysical Journal

      Volume: 印刷中

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Absolute Dimensions of a Flat Hierarchical Triple System KIC 6543674 from the Kepler Photometry2015

    • Author(s)
      Kento Masuda, Sho Uehara, Hajime Kawahara
    • Journal Title

      Astrophysical Journal Letters

      Volume: L37 Issue: 2 Pages: 806-806

    • DOI

      10.1088/2041-8205/806/2/l37

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Lifetime and Spectral Evolution of a Magma Ocean with a Steam Atmosphere: Its Detectability by Future direct Imaging2015

    • Author(s)
      Keiko Hamano, Hajime Kawahara, Yutaka Abe, Masanori Onishi, George L. Hashimoto
    • Journal Title

      Astrophysical Journal

      Volume: 806 Issue: 2 Pages: 216-216

    • DOI

      10.1088/0004-637x/806/2/216

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Open Access / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Suzaku X-ray study of the double radio relic galaxy cluster CIZA J2242.8+53012015

    • Author(s)
      H. Akamatsu, R. J. van Weeren, G. A. Ogrean, H. Kawahara, A. Stroe, D. Sobral, M. Hoeft, H. Rottgering, M. Bruggen, J. S. Kaastra
    • Journal Title

      Astronomy & Astrophysics

      Volume: 582 Pages: A87-A87

    • DOI

      10.1051/0004-6361/201425209

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Suzaku observations of the galaxy cluster 1RXS J0603.3+4214: Implications of particle acceleration processes in the "Toothbrush" radio relic2015

    • Author(s)
      Madoka Itahana, Motokazu Takizawa, Hiroki Akamatsu, Takaya Ohashi, Yoshitaka Ishisaki, Hajime Kawahara, Reinout J. van Weeren
    • Journal Title

      Publications of the Astronomical Society of Japan

      Volume: 67 Issue: 6 Pages: 113-113

    • DOI

      10.1093/pasj/psv084

    • Related Report
      2015 Research-status Report
    • Peer Reviewed / Int'l Joint Research / Acknowledgement Compliant
  • [Journal Article] Theoretical Emission Spectra of Atmospheres of Hot Rocky Super-Earths2015

    • Author(s)
      Ito, Y., Ikoma, M., Kawahara, H., Nagahara, H., Kawashima, Y., and Nakamoto, T.
    • Journal Title

      The Astrophysical Journal

      Volume: 801 Issue: 2 Pages: 144-144

    • DOI

      10.1088/0004-637x/801/2/144

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Spectroscopic Coronagraphy for Planetary Radial Velocimetry of Exoplanets2014

    • Author(s)
      Hajime Kawahara, Naoshi Murakami, Taro Matsuo, Takayuki Kotani
    • Journal Title

      The Astrophysical Journal Supplement Series

      Volume: 212 Issue: 2 Pages: 27-27

    • DOI

      10.1088/0067-0049/212/2/27

    • Related Report
      2014 Research-status Report
    • Peer Reviewed / Acknowledgement Compliant
  • [Journal Article] Exploring Hot Gas at Junctions of Galaxy Filaments with Suzaku2014

    • Author(s)
      Ikuyuki Mitsuishi, Hajime Kawahara, Norio Sekiya, Shin Sasaki, Thierry Sousbie and Noriko Y. Yamasaki
    • Journal Title

      The Astrophysical Journal

      Volume: 783 Issue: 2 Pages: 137-148

    • DOI

      10.1088/0004-637x/783/2/137

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Probing the extreme planetary atmosphere of WASP-12b2013

    • Author(s)
      Mark Swain, Pieter Deroo, Giovanna Tinetti, Morgan Hollis, Marcell Tessenyi, Michael Line , Hajime Kawahara, Yuka Fujii, Adam Showman, Sergey Yurchenko
    • Journal Title

      Icarus

      Volume: 225 Issue: 1 Pages: 432-445

    • DOI

      10.1016/j.icarus.2013.04.003

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Starspots-Transit Depth Relation of the Evaporating Planet Candidate KIC 12557548b2013

    • Author(s)
      Hajime Kawahara, Teruyuki Hirano, Kenji Kurosaki, Yuichi Ito, Masahiro Ikoma
    • Journal Title

      The Astrophysical Journal Letters

      Volume: 776 Issue: 1 Pages: L6-L6

    • DOI

      10.1088/2041-8205/776/1/l6

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Journal Article] Validity of Hydrostatic Equilibrium in Galaxy Clusters from Cosmological Hydrodynamical Simulations2013

    • Author(s)
      Suto, Kawahara, et al.
    • Journal Title

      Astrophysical Journal

      Volume: 767 Issue: 1 Pages: 79-79

    • DOI

      10.1088/0004-637x/767/1/79

    • Related Report
      2013 Research-status Report
    • Peer Reviewed
  • [Presentation] GPUライトカーブ解析で探るクールな領域の惑星2017

    • Author(s)
      河原 創
    • Organizer
      宇宙における生命ワークショップ
    • Place of Presentation
      一橋大学一橋講堂 (東京都千代田区)
    • Year and Date
      2017-03-06
    • Related Report
      2016 Annual Research Report
    • Invited
  • [Presentation] Transiting planets near and beyond the snow line2017

    • Author(s)
      Hajime Kawahara
    • Organizer
      Origin and diversity of planetary systems from the microscope to the telescope
    • Place of Presentation
      Nice (France)
    • Year and Date
      2017-02-20
    • Related Report
      2016 Annual Research Report
    • Int'l Joint Research / Invited
  • [Presentation] FM Exoplanets:反射光光度曲線の周期解析2016

    • Author(s)
      河原 創
    • Organizer
      日本天文学会2016年春季年会
    • Place of Presentation
      首都大学東京、東京都、八王子市
    • Year and Date
      2016-03-14
    • Related Report
      2015 Research-status Report
  • [Presentation] 地球型系外惑星の探査理論2014

    • Author(s)
      河原 創
    • Organizer
      第27回 理論懇シンポジウム
    • Place of Presentation
      国立天文台(東京都)
    • Year and Date
      2014-12-25
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Characterization of Exoplanets with High-contrast & High-Dispersion Instruments on Extremely Large Telescopes2014

    • Author(s)
      Hajime Kawahara
    • Organizer
      The 2014 German-Japanese meeting on Exo-Planets and their formation
    • Place of Presentation
      Haus der Astronomie, MPI-Astronomy Campus(ドイツ)
    • Year and Date
      2014-11-06
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] 系外惑星の分光直接検出のためのSpectroscopic Coronagraph2014

    • Author(s)
      河原創、村上尚史、松尾太郎、小谷隆行
    • Organizer
      日本天文学会秋季年会
    • Place of Presentation
      山形大学(山形県)
    • Year and Date
      2014-09-12
    • Related Report
      2014 Research-status Report
  • [Presentation] Characterization of Exoplanets with High Contrast Instruments2014

    • Author(s)
      Hajime Kawahara
    • Organizer
      Japan Geoscience Meeting 2014
    • Place of Presentation
      パシフィコ横浜(神奈川県)
    • Year and Date
      2014-04-28
    • Related Report
      2014 Research-status Report
    • Invited
  • [Presentation] Characterization of Exoplanets using Planetary Radial Velocimetry2014

    • Author(s)
      Hajime Kawahara
    • Organizer
      Exoclimes III
    • Place of Presentation
      Davos Congress Centre (Switzerland, Davos)
    • Related Report
      2013 Research-status Report
  • [Presentation] Starspots - Transit Depth Relation of KIC 12557548b2013

    • Author(s)
      Hajime Kawahara, Teruyuki Hirano, Kenji Kurosaki, Yuichi Ito, Masahiro Ikoma
    • Organizer
      Kepler Science Conference II
    • Place of Presentation
      NASA Ames center, (USA, California)
    • Related Report
      2013 Research-status Report
  • [Presentation] 系外惑星探査の進展

    • Author(s)
      河原 創
    • Organizer
      研究環シンポジウム:宇宙の化学進化 2014
    • Place of Presentation
      首都大学東京、(東京都八王子市)
    • Related Report
      2013 Research-status Report
    • Invited
  • [Presentation] 蒸発惑星のTransit Depth Variation

    • Author(s)
      河原 創, 平野照幸, 黒崎健二, 伊藤祐一, 生駒大洋
    • Organizer
      日本天文学会秋期年会
    • Place of Presentation
      東北大学、(宮城県仙台市)
    • Related Report
      2013 Research-status Report

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Published: 2014-07-25   Modified: 2019-07-29  

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