Yuka Fujii's Homepage

Publication

Refereed Articles

1. Jacob Lustig-Yaeger, Victoria S. Meadows, Guadalupe Tovar Mendoza, Edward W. Schwieterman, Yuka Fujii, Rogrigo Luger, Tyler D. Robinson, Astronomical Journal, Volume 156, Issue 6, article id. 301, 16 pp. (2018) [ADS] [AJ] [arXiv]
   
   "Detecting Ocean Glint on Exoplanets Using Multiphase Mapping"


2. Y. Fujii, Daniel Angerhausen, Russell Deitrick, Shawn Domagal-Goldman, John Lee Grenfell, Yasunori Hori, Stephen R. Kane, Enric Palle, Heike Rauer, Nicholas Siegler, Karl Stapelfeldt, Kevin B. Stevenson, Astrobiology, Astrobiology, Volume 18, 739-778 (2018) [ADS] [Astrobiology] [arXiv]
   
   "Exoplanet Biosignatures: Observational Prospects"


3. Nancy Y. Kiang, Shawn Domagal-Goldman, Mary N. Parenteau, David C. Catling, Yuka Fujii, Victoria S. Meadows, Edward W. Schwieterman, Sara I. Walker, Astrobiology, Volume 18, Issue 6, 2018, pp.619-629 (2018) [ADS] [Astrobiology]
   
   "Exoplanet Biosignatures: At the Dawn of a New Era of Planetary Observations"


4. Teruyuki Hirano, Fei Dai, John H. Livingston, Y. Fujii, et al., Astronomical Journal, Volume 155, Issue 3, article id. 124, 11 pp. (2018) [ADS] [AJ] [arXiv]
   
   "K2-155: A Bright Metal-Poor M Dwarf with Three Transiting Super-Earths"


5. Y. Fujii, Jacob Lustig-Yaeger, Nicolas B. Cowan, Astronomical Journal, Volume 154, Issue 5, article id. 189, 9 pp. (2017) [ADS] [AJ] [arXiv]
   
   "Rotational Spectral Unmixing of Exoplanets: Degeneracies between Surface Colors and Geography"


6. Y. Fujii, Anthony D. Del Genio, David S. Amundsen, Astrophyiscal Journal, Volume 848, Issue 2, article id. 100, 13 pp. (2017) [ADS] [ApJ] [arXiv]
   
   "NIR-Driven Moist Upper Atmospheres of Synchronously Rotating Temperate Terrestrial Exoplanets"


7. Michael. J. Way, Igor Aleinov, David. S. Amundsen, Mark Chandler, Thomas Clune, Anthony D. Del Genio, Y. Fujii, Maxwell Kelley, Nancy Y. Kiang, Linda Sohl, Kostas Tsigaridis, The Astrophysical Journal Supplement Series, Volume 231, Issue 1, article id. 12 (2017) [ADS] [ApJS] [arXiv]
   
   "Resolving Orbital and Climate Keys of Earth and Extraterrestrial Environments with Dynamics 1.0: A General Circulation Model for Simulating the Climates of Rocky Planets"


8. Y. Fujii, David S. Spiegel, Tony Mroczkowski, Jason Nordhaus, Neil T. Zimmerman, Aaron Parsons, Mehrdad Mirbabayi, Nikku Madhusudhan, Astrophysical Journal, Volume 820, Issue 2, article id. 122 (2016) [ADS] [ApJ] [arXiv]
   
   "Radio Emission from Red-Giant Hot Jupiters"


9. Y. Fujii, J. Kimura, J. Dohm, M. Ohtake, Astrobiology, Astrobiology, Volume 14, pp. 753-768 (2014) [Astrobio] [ADS] [arXiv]
   
   "Geology and Photometric Variation of Solar System Bodies with Minor Atmospheres: Implications for Solid Exoplanets"


10. K. M. Lewis and Y. Fujii, The Astrophysical Journal Letters, Volume 791, article id. L26 (2014) [ApJ] [ADS] [arXiv]
    
    "Next Generation of Telescopes or Dynamics Required to Determine if Exo-Moons have Prograde or Retrograde Orbits"


11. H. Rein, Y. Fujii, D. S. Spiegel, Proceedings of the National Academy of Sciences, article id. 24778224 (2014) [PNAS] [ADS] [arXiv]
    
    "Some inconvenient truths about biosignatures involving two chemical species on Earth-like exoplanets"


12. Y. Xue, Y. Suto, A. Taruya, T. Hirano, Y. Fujii, K. Masuda, The Astrophysical Journal, Volume 784, Issue 1, article id. 66, 9 pp. (2014) [ApJ] [ADS] [arXiv]
    
    "Tidal Evolution of the Spin-Orbit Angle in Exoplanetary Systems"


13. M. Swain, D. Mark, G. Tinetti, M. Hollis, T. Morgan, L. Marcell, M. Line, H. Kawahara, Y. Fujii, A. P. Showman, S. N. Yurchenko, Icarus, Volume 225, Issue 1, p. 432-445 (2013) [Icarus] [ADS] [arXiv]
    
    "Probing the extreme planetary atmosphere of WASP-12b"


14. Y. Fujii, E. L. Turner and Y. Suto, The Astrophysical Journal, Volume 765, article id. 76 (2013) [ApJ] [ADS] [arXiv]
    
    "Variability of Water and Oxygen Absorption Bands in the Disk-Integrated Spectra of the Earth"


15. H. Kawahara, T. Matsuo, M. Takami, Y. Fujii, T. Kotani, N. Murakami, M. Tamura, and O. Guyon, The Astrophysical Journal, Volume 758, Issue 1, article id. 13 (2012) [ApJ] [ADS] [arXiv]
    
    "Can Ground-based Telescopes Detect The Oxygen 1.27 Micron Absorption Feature as a Biomarker in Exoplanets ?"


16. Y. Fujii and H. Kawahara, The Astrophysical Journal, Volume 755, Issue 2, article id. 101 (2012) [ApJ] [ADS] [arXiv]
    
    "Mapping Earth-analogs from Photometric Variability: Spin-Orbit Tomography for Planets in Inclined Orbits"


17. H. Kawahara and Y. Fujii, The Astrophysical Journal Letters, Volume 739, Issue 2, article id. L62 (2011) [ApJ] [ADS] [arXiv]
    "Mapping Clouds and Terrain of Earth-like Planets from Photometric Variability: Demonstration with Planets in Face-on Orbits"


18. Y. Fujii, H. Kawahara, Y. Suto, S. Fukuda, T. Nakajima, T. A. Livengood, and E. L. Turner, The Astrophysical Journal, Volume 738, Issue 2, article id. 184 (2011) [ApJ] [ADS] [arXiv]
    "Colors of a Second Earth. II. Effects of Clouds on Photometric Characterization of Earth-like Exoplanets"


19. H. Kawahara and Y. Fujii, The Astrophysical Journal, Volume 720, Issue 2, pp. 1333-1350 (2010) [ApJ] [ADS] [arXiv]
    
    "Global Mapping of Earth-like Exoplanets From Scattered Light Curves"


20. Y. Fujii, H. Kawahara, Y. Suto, A. Taruya, S. Fukuda, T. Nakajima, and E. L. Turner, The Astrophysical Journal, Volume 715, Issue 2, pp. 866-880 (2010) [ApJ] [ADS] [arXiv]
    "Colors of a Second Earth: Estimating the Fractional Areas of Ocean, Land, and Vegetation of Earth-like Exoplanets"

Presentation (International)

Talk

1. Mar 8, 2018 DTA symposium VIII: Challenge to Super-Earths and Their Atmospheres @National Astronomical Observatory of Japan, Tokyo, Japan
   "Climate of Temperate Rocky Planets and Their Observational Consequences" (Invited)


2. Oct 5-6, 2017 Workshop "Life Detection Technologies: For Mars, Enceladus & Beyond" @ELSI, Tokyo, Japan
   "Search for Life Beyond the Solar System: Challenges and Prospects"


3. Dec 12, 2016 AGU Fall Meeting @San Francisco, CA, USA
   "3D Modeling of the H2O Profile of Temperate Earth-Size Planets around Late-Type Stars, and the Signatures in Transit Spectra"


4. Jul 14, 2015 "Mapping Other Worlds", satellite meeting at Pathways toward habitable planets @Bern, Switzerland
   "Mapping Terrestrial Planets" (Invited)


5. Jan 13-15, 2015 3rd ELSI symposium @Tokyo, Japan
   "Color Variation of Planets"


6. Jan 12-17, 2014 Gordon Research Conference @Galveston, TX, USA
   "Exoplanets" (Invited)


7. Nov 28-30, 2013 International Astrobiology Workshop @Tokyo, Japan
   "Toward Characterization of Exoplanetary Surface Environment"


8. March 27-29, 2013 Earth-Life Science Institute 1st International Symposium @Tokyo, Japan
   "Characterizing surface environment of Earth-like exoplanets via disk-integrated scattered light"
   


9. Jan 16-20, 2012 Exoclimes 2012 @Aspen, CO, USA
   "Simulation and Inversion of Annual Light Curves of a Second Earth"
   Y. Fujii and H. Kawahara

Poster

1. Jul 3-8, 2016 Exoplanets I @Davos, Switzerland
   "H2O Signatures of Temperate Earth-size Planets around Late-type Stars: Prime Targets in Future Transit Observations"
   Y. Fujii, A. D. Del Genio, D. S. Amundsen


2. Jun 15-19, 2015 AbSciCon @Chicago, IL, USA
   "Targeting the Geologic Signatures of Exoplanets: Lessons Learned from Solid Bodies in the Solar System"
   Y. Fujii, J. Kimura, J. Dohm


3. Jul 6-11, 2014 Origins 2014 @Nara, Japan
   "Geology and Photometric Properties of Solar System Bodies: Implication for Characterization of Small Exoplanets"
   Y. Fujii, J. Kimura, J. Dohm, M. Ohtake, H. Rein, D. S. Spiegel


4. Mar 24-26, 2014 2nd ELSI International Symposium @Tokyo, Japan
   "Solar System Bodies as Single Dots"
   Y. Fujii, J. Kimura, J. Dohm, M. Ohtake, H. Rein, D. S. Spiegel


5. Dec 8-12, 2013 Exoplanets and Disks: Their Formation and Diversity @Kona, HI, USA
   "Photometric Variability of Solar System Solid Bodies: Implications for Rocky/Icy Exoplanets"
   Y. Fujii, J. Kimura, J. Dohm, M. Ohtake


6. Aug 27-31, 2012 IAU General Assembly, Symposium 293 @Beijing, China
   "Probing the Humidity of Earth-like Exoplanets"
   Y. Fujii, E. L. Turner and Y. Suto


7. Sep 11-17, 2011 Extreme Solar Systems II @Jackson, WY, USA
   "Global Mapping of Earth-like Exoplanets from Scattered Light Curves as a Probe of the Habitat"
   Y. Fujii and H. Kawahara


8. Jul 26-30, 2010 Sagan Exoplanet Summer Workshop　@Caltech, Pasadena, CA, USA
   "Investigating Surfaces of Earth-like Exoplanets via Scattered Light"
   Y. Fujii et al.

Seminar Talk

1. May 5, 2014, NASA Goddard Institute of Space Studies, NY, USA
2. Dev 17, 2013, NASA Goddard Space Flight Center, MD, USA
3. Nov 30, 2012, Penn State University, State College, PA, USA
4. Nov 19, 2012, CfA/Harvard University, Cambridge, MA, USA
5. Nov 7, 2012, American Museum of Natural History, New York City, NY, USA

Presentation (domestic/日本)

Talk

1. 2018年3月14-17日　天文学会春季年会@千葉大学(千葉)
   "同期回転する水惑星の気候とスペクトル"


2. 2018年2月21日　ワークショップ「高精度ドップラー観測で探る太陽型星周りのハビタブル惑星」@東京工業大学(東京)
   "太陽型星周りハビタブル惑星の表層環境の観測可能性"


3. 2017年11月16-17日　Japan AstroBiology Network annual workshop@JAXA(東京)
   "系外惑星で生命探し？" (invited)


4. 2015年10月14-16日　惑星科学会秋季講演会@地球生命研究所(東京)
   "巨星周り系外惑星の電波放射の検討"


5. 2013年11月20-22日　惑星科学会秋季講演会@石垣市(沖縄)
   "Modeling of photometric properties of Solar System objects for future direct imaging observations of exoplanets"


6. 2013年3月20-24日　天文学会春季年会@埼玉大学(埼玉)
   "吸収線の変動で探る地球型惑星の表層環境"


7. 2012年3月19-22日　天文学会春季年会@龍谷大学深草キャンパス(京都)
   "地球型惑星の水吸収線と表層環境"


8. 2011年6月16-18日　国際高等研究所「宇宙の生命」研究会@東京大学本郷キャンパス(東京)
   "地球型惑星のキャラクタリゼーション"


9. 2011年3月9-11日　系外惑星大研究会@国立天文台三鷹キャンパス(東京)
   "反射光で探る地球型惑星の表層環境とバイオマーカー"


10. 2010年12月28日　ワークショップ「ハビタブルプラネット」@東京工業大学大岡山キャンパス(東京)
    "地球型惑星の反射光の解析と植物の検出"


11. 2010年1月18日-20日　系外惑星大研究会@国立天文台三鷹キャンパス(東京)
    "Colors of Earth-like planets"


12. 2009年9月14-16日　天文学会秋季年会@山口大学(山口)
    "測光観測による地球型系外惑星の表面組成の推定法"


13. 2009年3月　天文学会2009年春季年会@大阪府立大学(大阪)
    藤井友香, 須藤靖, 樽家篤史, 福田悟, 中島映至, Edwin L. Turner,
    "地球型惑星の反射光の時間変動とバイオマーカー"

Poster

1. 2010年3月24-27日　天文学会春季年会@広島大学(広島)
   "反射光による地球型系外惑星の特徴付け"


2. 2010年3月15-17日　第11回惑星圏研究会@東北大学(宮城)
   藤井友香, 河原創, 須藤靖, 樽家篤史, 福田悟, 中島映至, Edwin L. Turner
   "反射光による系外惑星の表層環境の探査にむけて"


3. 2009年8月30日-9月2日　「宇宙における時空・物質・構造の進化」研究会(沖縄)
   "Estimating planetary surface from its light curves"
   ○藤井友香, 河原創, 須藤靖, 樽家篤史, 福田悟, 中島映至, Edwin L. Turner

Seminar Talk

1. 2011年6月10日　早稲田大学(東京)
   "第二の地球の覗き方：反射光による系外惑星の表層環境の再構築"


2. 2011年3月1日　白眉セミナー
   "惑星反射光からの系外惑星の地図作り"


3. 2010年10月26日　系外惑星系セミナー
   "系外惑星の直接撮像に向けて"

Public Relation

1. Feb 27, 2018　Tokyo Tech website highlights the paper to which I contributed and the companion paper led by the same team, where 15 new exoplanets around low-mass stars are confirmed ( Japanese / English )


2. Oct 20, 2017　A story about our recent study on moist upper atmospheres of synchronously rotating planets


3. Feb 2, 2017　Interviewee for 河出書房新社「科学者18人にお尋ねします。宇宙には誰かいますか?」


4. Sep 10, 2016　朝倉書店「系外惑星の事典」 へ寄稿


5. Sep 19, 2015　Public lecture for Asahi Culture Center「生命の起源と宇宙の生命」


6. Dec, 2014　Our paper about color variation of Solar System bodies is featured on Astrobiology Magagine


7. Jul, 2014　Small contribution to TenQ


8. Apr, 2014　Our paper about potential false positive of biosignature with multiple chemical species is featured on Science Now and several other websites


9. Jun 27, 2013　Online Public Talk for GCOE「地球たち」オンラインサイエンスカフェ　第6回
   "系外惑星の絵を描く"


10. Aug, 2012　Our paper about global mapping of Earth analogs is featured on New Scientist


11. Mar 20, 2012 Public Talk at 第12回自然科学研究機構シンポジウム 知的生命の可能性-宇宙に仲間はいるのかIII-
    "地球型惑星におけるバイオマーカー"


12. Oct, 2010　Our paper about inverstion of disk-integrated color of the Earth is featured in 日経サイエンス10月号


13. May, 2010　Our paper about inverstion of disk-integrated color of the Earth is featured on Space.com

Services

Biography

Fellowship / Employment

Jun 2017-   Project Associate Professor / Associate PI at Earth-Life Science Institute, Tokyo Institute of Technology
Nov 2015-May 2017   NASA Postdoctoral Program Fellow at NASA Goddard Institute for Space Studies (Advisor: Dr. A. D. Del Genio)
Nov 2014-   Project Assistant Professor at Earth-Life Science Institute, Tokyo Institute of Technology
2013-2014   Research Scientist at Earth-Life Science Institute, Tokyo Institute of Technology
2011-2013   JSPS Research Fellow (DC2)
2010-2011   Research Assistant at the Univ. of Tokyo
2008-2010   Teaching Assistant at the Univ. of Tokyo
         --- Physics Seminar
         --- General Relativity

Education

2013   Doctoral Degree from the University of Tokyo
         Supervisor --- Prof. Yasushi Suto
         Thesis Title --- Exploring the landscape of habitable exoplanets via their
                              disk-integrated colors and spectra:
                              Indications for future direct imaging observations  
2010   Master's Degree from the University of Tokyo
         Supervisor --- Prof. Yasushi Suto
         Thesis Title --- Toward Remote Sensing of Extrasolar Earth-like Planet
2008   Bachelor's Degree from the University of Tokyo
2004   Graduation from the Senior High School Attached to Kyoto University of Education

Award / Grant

• 2016    Inoue Research Award for Young Scientists
• 2015-2018   JSPS Grants-in-Aid for Young Scientists (Wakate-B) (declined for 2nd and 3rd years)
• 2014    ELSI Incentive Award
• 2013    ELSI Incentive Award
• 2012-2014   JSPS Grants-in-Aid for Young Scientists (Start-up)
• 2010    Grant from the Hayakawa Satio Fund awarded by the Astronomical Society of Japan
• 2007    Selected for Elite Science Student Visit Abroad Program (ESSVAP) by School of Science, University of Tokyo

Contact