Presentations

Last updated: June 8, 2025

International Conferences/Workshops

Talks

1. [Invited talk] Y. Kawashima "Exoplanet Science with TMT", Subaru Users Meeting FY 2024 (National Astronomical Observatory of Japan, Tokyo, Japan, 2025.1)

2. Y. Kawashima, H. Kawahara, Y. Kasagi, H. Ishikawa, K. Masuda, T. Kotani, T. Kudo, T. Hirano, M. Kuzuhara, S. Nugroho, J. Livingston, M. Tamura, and IRD team, "Subaru/IRD high-resolution spectroscopy of a T-type brown dwarf and investigation of its atmospheric properties with high-resolution spectrum model ExoJAX", Subaru Users Meeting FY2023 (National Astronomical Observatory of Japan, Tokyo, Japan, 2024.1)

3. Y. Kawashima, S. Miyazaki, and H. Kawahara, "Low-temperature Brown Dwarf Survey by Wide-Field Camera of GREX-PLUS", GREX-PLUS meeting (Waseda University, Tokyo, Japan, 2023.12)

4. Y. Kawashima, S. Ma, K. Ohno, Y. Ito, and cloud/haze working group, "New Ariel Working Group focusing on clouds/haze", Ariel Consortium Meeting (Budapest, Hungary + Online, 2023.10)

5. [Invited talk] Y. Kawashima "Exoplanet Science in the Era of JWST", Japanese-American-German Frontiers of Science Symposium (JAGFOS) 2023 (Dresden, Germany, 2023.10)

6. [Keynote talk] Y. Kawashima "Cloud models in planets", Cloud Zwei Con (Ringberg Castle, Germany, 2023.1)

7. Y. Kawashima and M. Min, "Exploring disequilibrium chemistry in the atmospheres of hot jupiters", ARIEL: Science, Mission & Community 2020 Conference (ESTEC, The Netherlands, 2020,1)

8. Y. Kawashima and M. Min, "Atmospheric retrieval with disequilibrium chemistry", SRON Science Days 2019 (Utrecht, The Netherlands, 2019.11)

9. Y. Kawashima, M. Min, and M. Ikoma "Theoretical modeling of exoplanet atmospheres: chemistry and aerosols", JSPS core-to-core program Planet2/RESCEU workshop: Atmosphre of Exoplanets: a link between theoretical studies and observations toward the next generation (Tokyo, Japan, 2019.10)

10. Y. Kawashima and M. Min, "Effect of disequilibrium chemistry on the spectra of exoplanet atmospheres", Planet2/RESCEU Symposium 2019 From Protoplanetary Disk through Planetary System Architecture to Planetary Atmospheres and Habitability (Okinawa, Japan, 2019.10)

11. Y. Kawashima and M. Min, "Exploring disequilibrium chemistry in the atmospheres of hot jupiters", ARIEL consorthium meeting (Utrecht, The Netherlands, 2019.10)

12. Y. Kawashima and M. Ikoma, "Effect of UV irradiation intensity, metallicity, and eddy diffusion on transmission spectra of hazy exoplanet atmospheres", ExoClimes (Oxford, UK, 2019.8)

13. Y. Kawashima and M. Ikoma, "Metallicity-dependence of transmission spectra of hazy exoplanet atmospheres", DIGITAL EXOPLANETS (Charles University, Prague, Czech Republic, 2019.1)

14. Y. Kawashima and M. Ikoma, "Theoretical transmission spectra of hazy exoplanet atmospheres: Effect of elemental abundance ratios", 2018年度惑星・衛星系研究会 (Gotenba, Japan, 2018.9)

15. Y. Kawashima and M. Ikoma, "Possible origin of diverse transmission spectra of warm transiting exoplanets: Growth and settling of hydrocarbon haze produced via UV irradiation", DTA SYMPOSIUM VIII Challenge to Super-Earths and Their Atmospheres - Where do they come from? (National Astronomical Observatory of Japan, Tokyo, Japan, 2018.3)

16. Y. Kawashima and M. Ikoma, "Atmospheric composition of TRAPPIST-1 planets", 第10回系外惑星観測検討ワークショップ (Kanagawa, Japan, 2017.8)

17. Y. Kawashima and M. Ikoma, "Transmission spectrum models of exoplanet atmospheres with haze", 2nd Advanced School on Exoplanetary Science (Vietri sul Mare, Italy, 2017.5)

18. Y. Kawashima and M. Ikoma, "Transmission spectrum models of exoplanet atmospheres with haze: Effect of creation, growth, and settling of haze particles", JSPS Core-to-Core Program “Planet2” Symposium 2017 (Villefranche sur Mer, France, 2017.2)

19. Y. Kawashima and M. Ikoma, "Theoretical transmission spectra of transiting exoplanets with hazy atmospheres", APCosPA-Planet2 RESCEU Summer School (Gifu, Japan, 2016,8)

20. Y. Kawashima and S. Rugheimer, "Impact of clouds on detecting oxygen", Kavli Summer Program in Astrophysics 2016: Exoplanetary Atmospheres (UC Santa Cruz, California, United States, 2016.7)

21. Y. Kawashima, M. Ikoma, A. Fukui, N. Narita, "Transmission spectrum models of exoplanet atmospheres with haze", Meeting on Exoplanets (Tokyo Institute of Technology Earth-Life Science Institute, Tokyo, Japan, 2014.7)

Posters

1. Y. Kawashima, S. Miyazaki, and H. Kawahara, "Detectability of the coolest Y-type brown dwarfs by a next-generation infrared satellite", Japan Geoscience Union Meeting 2024 (Chiba, Japan, 2024.5)

2. Y. Kawashima, H. Kawahara, Y. Kasagi, H. Ishikawa, K. Masuda, T. Kotani, T. Kudo, T. Hirano, M. Kuzuhara, S. Nugroho, J. Livingston, M. Tamura, and IRD team, “Subaru/IRD high-resolution spectroscopy of a T-type brown dwarf and investigation of its atmospheric properties with high-resolution spectrum model ExoJAX”, Exoclimes VI (Exeter, UK, 2023.6)

3. Y. Kawashima, H. Kawahara, Y. Kasagi, H. Ishikawa, K. Masuda, T. Kotani, T. Kudo, T. Hirano, M. Kuzuhara, S. Nugroho, J. Livingston, M. Tamura, and IRD team, “Subaru/IRD high-resolution spectroscopy of a T-type brown dwarf and investigation of its atmospheric properties with high-resolution spectrum model ExoJAX”, Japan Geoscience Union Meeting 2023 (Chiba, Japan, 2023.5)

4. Y. Kawashima, H. Kawahara, Y. Kasagi, H. Ishikawa, K. Masuda, T. Kotani, T. Kudo, T. Hirano, M. Kuzuhara, S. Nugroho, J. Livingston, M. Tamura, and IRD team, “Subaru/IRD high-resolution spectroscopy of a T-type brown dwarf and investigation of its atmospheric properties with high-resolution spectrum model ExoJAX”, Protostars and Planets VII (Kyoto, Japan, 2023.4)

5. Y. Kawashima and M. Min, "Implementation of disequilibrium chemistry to spectral retrieval code ARCiS: Indication of disequilibrium chemistry for HD 209458b and WASP-39b", Symposium on Next Generation Astrochemistry (Tokyo, Japan + Online, 2022.11)

6. Y. Kawashima and M. Min, "Implementation of Disequilibrium Chemistry to Spectral Retrieval Code ARCiS and Application to Sixteen Exoplanet Transmission Spectra: Indication of Disequilibrium Chemistry for HD 209458b and WASP-39b", COSPAR 2022 44th Scientific Assembly (Athens, Greece + Online, 2022.7)

7. Y. Kawashima, M. Ikoma, and R. Hu, "Theoretical transmission spectra of exoplanet atmospheres with hydrocarbon haze: Dependence on UV irradiation intensity, metallicity, C/O ratio, eddy diffusion coefficient, temperature, and gravity", Tackling the Complexities of Substellar Objects (Leiden, The Netherlands, 2020.2)

8. Y. Kawashima and M. Min, "Effect of disequilibrium chemistry on the spectra of exoplanet atmospheres", Extreme Solar Systems IV (Reykjavik, Iceland, 2019.8)

9. Y. Kawashima and M. Ikoma, "Possible origin of diverse transmission spectra of warm transiting exoplanets: Growth and settling of hydrocarbon haze produced via UV irradiation", PhD/Postdocs PEPSci Meeting (TU Delft, Delft, The Netherlands, 2018.10)

10. Y. Kawashima and M. Ikoma, "Possible origin of diverse transmission spectra of warm transiting exoplanets: Growth and settling of hydrocarbon haze produced via UV irradiation", The 2nd Rencontres du Vietnam on Exoplanetary Science (Quy Nhon, Vietnam, 2018.2)

11. Y. Kawashima and M. Ikoma, "Transmission spectrum models of exoplanet atmospheres with haze: Effect of creation, growth, and settling of haze particles", Exoclimes 2016 (Quest University, Squamish, Canada, 2016.8)

12. Y. Kawashima and M. Ikoma, "Transmission spectrum models of exoplanet atmospheres with haze: Effect of creation, growth, and settling of haze particles", Kavli Summer Program in Astrophysics 2016: Exoplanetary Atmospheres (UC Santa Cruz, California, United States, 2016.6)

13. Y. Kawashima and M. Ikoma, "Transmission spectrum models of exoplanet atmospheres with haze: Effect of growth and settling of haze particles", International Workshop on “Exoplanets and Disks: Their Formation and Diversity III” (Okinawa, Japan, 2016.2)

14. Y. Kawashima and M. Ikoma, "Transmission spectrum models of exoplanet atmospheres with haze: Effects of growth and settling of haze particles", From super-earths to brown dwarfs: who’s who? (Institut d'Astrophysique de Paris, Paris, France, 2015.7)

15. Y. Kawashima and M. Ikoma, "Effects of growth of haze particles on transmission spectra of exoplanets", Workshop on Exoplanets in JFY2014 (The University of Tokyo, Tokyo, Japan, 2015.3)

16. Y. Kawashima, M. Ikoma, A. Fukui, N. Narita, "Transmission spectrum models of exoplanet atmospheres with haze: Application to GJ 3470b and WASP-80b", 2014 German-Japanese Exoplanet Conference (Max Planck Institute for Astrophysics, Heidelberg, Germany, 2014.11)

17. Y. Kawashima, M. Ikoma, A. Fukui, N. Narita, "Transmission spectrum models of low-mass exoplanet atmospheres with haze: Application to GJ 3470b", Origins 2014 (Nara, Japan, 2014.7)

Domestic Conferences/Workshops

Talks

1. [招待講演] 川島由依, "可視・赤外分光観測で探る系外惑星の大気", 第30回天体スペクトル研究会 (京都大学, 2025.3)

2. [招待講演] 川島由依, "Characterizing the Atmospheres of Exoplanets and Brown Dwarfs", Cool Stars Workshop in Japan (東京大学, 2025.2)

3. Y. Kawashima et al., "Haze and spectrum modeling for a puffy planet Kepler-51d and comparison with the observed JWST/NIRSpec spectrum", Workshop of Theoretical Astronomy 2024 (有馬, 2024.12)

4. Y. Kawashima et al., "Subaru/IRD high-resolution spectroscopy of the archetype T-type brown dwarf and atmospheric retrieval & Haze modeling for Kepler-51d JWST/NIRSpec spectrum", 2024年度冬季トランジット惑星研究検討会議 (立命館大学, 2024.12)

5. [レビュー講演] 川島由依, "巨大惑星・褐色矮星の下層大気", 系外惑星大気Workshop 2024 (立教大学, 2024.11)

6. 川島由依, "Observability of CO worlds", 2nd CO world Plenary Meeting (白馬, 2024.7)

7. 川島由依, 河原創, 笠木結, 石川裕之, 増田賢人, 小谷隆行, 工藤智幸, 平野照幸, 葛原昌幸, Stevanus Nugroho, John Livingston, 田村元秀, IRDチーム, "ExoJAXを用いた褐色矮星大気の高分散スペクトル解析", 天文学における自動微分と逆問題研究会 (大阪大学, 2024.7)

8. [招待講演] 川島由依, "Exoplanet Science", TMT-ACCESS 2024 (東北大学, 2024.6)

9. 川島由依, 河原創, 笠木結, 石川裕之, 増田賢人, 小谷隆行, 工藤智幸, 平野照幸, 葛原昌幸, Stevanus Nugroho, John Livingston, 田村元秀, IRDチーム, "すばる望遠鏡IRDによる
T型褐色矮星の高分散分光観測と高分散スペクトルモデルExoJAXによる大気特性の調査", 日本天文学会 2023年秋季大会, P308a (名古屋, 2023.9)

10. [招待講演] 川島由依, "Atmospheric characterization of giant planets and brown dwarfs", JASMINE Consortium Meeting 2023 (国立天文台, 2023.8)

11. 川島由依, 藤井友香, 松尾太郎, 大野和正, "GREX-PLUS：系外惑星のサイエンス", 光赤天連シンポジウム：2030年代にどのような戦略的中型計画を推進するのか (オンライン, 2022.7)

12. [招待講演] 川島由依, 藤井友香, 松尾太郎, "GREX-PLUSによる系外惑星観測", GREX-PLUS サイエンス検討会 FY2021 (オンライン+早稲田大学, 2022.3)

13. [招待講演] 川島由依, "系外ガス惑星大気の化学とエアロゾル：太陽系惑星とのシナジー", 第23回惑星圏研究会 (オンライン, 2022.2)

14. [招待講演] 川島由依, "JASMINEによる褐色矮星の光度変動観測", JASMINE Consortium Meeting 2021 (オンライン, 2021.12)

15. 川島由依, Michiel Min, "系外惑星のスペクトル・リトリーバルコードへの非平衡化学の導入", 日本天文学会 2021年春季年会 (オンライン, 2021.3)

16. 川島由依, Michiel Min, "系外惑星大気における非平衡化学の影響", 日本惑星科学会秋季講演会 (オンライン, 2020.11)

17. 川島由依, 生駒大洋, "Effect of metallicity and eddy diffusion on transmission spectra of hazy exoplanet atmospheres", 日本地球惑星科学連合2019年大会, PAE20-04 (幕張, 2019.5)

18. 川島由依, 生駒大洋, "ヘイズを持つ系外惑星の大気透過スペ クトルモデル：元素存在度の影響", 日本天文学会 2018年秋季年会 (兵庫県立大学, 2018.9)

19. 川島由依, 生駒大洋, "Possible origin of diverse transmission spectra of warm transiting exoplanets: Growth and settling of atmospheric haze produced via UV irradiation", 日本地球惑星科学連合2018年大会 (幕張, 2018.5)

20. 川島由依, 生駒大洋, "ヘイズを持つ系外惑星の大気透過スペクトルモデル：GJ 1214bとGJ 3470b、GJ 436bへの応用", 日本天文学会 2017年秋季年会 (北海道大学, 2017.9)

21. 川島由依, 生駒大洋, "系外惑星の大気透過スペクトルの多様性の解明：ヘイズ粒子の生成・成長・沈降の効果", 日本天文学会 2016年秋季年会 (愛媛大学, 2016.9)

22. 川島由依, 生駒大洋, "系外惑星の大気透過スペクトルの多様性の解明：ヘイズ粒子の生成・成長・沈降の効果", 日本惑星科学会秋季講演会 (ノートルダム清心女子大学, 2016.9) + ポスター

23. 川島由依, 生駒大洋, "ヘイズを持つ系外惑星の大気透過スペクトルモデル：ヘイズ粒子の成長と沈降の影響", 第8回系外惑星観測検討ワークショップ (別府, 2016.8)

24. 川島由依, 生駒大洋, "ヘイズを持つ系外惑星の大気透過スペクトルモデル：ヘイズ粒子の成長と沈降の影響", 2016年冬のトランジット観測検討会 (石垣, 2016.2)

25. 川島由依, 生駒大洋, "ヘイズを持つ系外惑星の大気透過スペクトルモデル：ヘイズ粒子の成長と沈降の影響", 2015年夏のトランジット観測検討会 (函館, 2015.8)

26. 川島由依, 生駒大洋, "惑星大気のヘイズについて", 2014年度：若手連携研究会「低温度星まわりの生命居住可能惑星を想定した光合成特性の連携研究」 (熱海, 2015.3)

27. 川島由依, 生駒大洋, "ヘイズを持つ系外惑星の大気透過スペクトルモデル：大気組成と起源の解明に向けて", 2015年冬のトランジット観測検討会 (箱根, 2015.2)

28. 川島由依, 生駒大洋, 福井暁彦, 成田憲保, "ヘイズを持つ低質量系外惑星の大気透過スペクトルモデル：温度および組成の鉛直分布の影響", 日本惑星科学会秋期講演会 (東北大学, 2014.9)

29. 川島由依, 生駒大洋, 福井暁彦, 成田憲保, "ヘイズの存在可能性を考慮したトランジット系外惑星の透過スペクトルモデル", 2014年夏のトランジット観測検討会 (熱海, 2014.9)

30. 川島由依, 生駒大洋, 福井暁彦, 成田憲保, "ヘイズを持つ低質量系外惑星の大気透過スペクトルモデル: GJ 3470bへの応用", 日本地球惑星科学連合2014年大会 (横浜, 2014.4)

31. 川島由依, 生駒大洋, 福井暁彦, 成田憲保, "理論による透過光分光スペクトルの計算", 2014年冬のトランジット観測検討会 (湯布院, 2014.1)

Posters

1. 川島由依, 河原創, 笠木結, 石川裕之, 増田賢人, 小谷隆行, 工藤智幸, 平野照幸, 葛原昌幸, Stevanus Nugroho, John Livingston, 田村元秀, IRDチーム, "すばる望遠鏡IRDによる褐色矮星Gl 229Bの高分散分光観測とスペクトル計算コードExoJAXを用いた大気特性の調査", 日本惑星科学会2022年秋季講演会, PB-28 (水戸+オンライン, 2022.9)

2. 川島由依, 河原創, 小玉貴則, 増田賢人, 小谷隆行, 平野照幸, JASMINE系外惑星検討班 (Exo-JASMINEチーム), "JASMINEによる褐色矮星の光度変動観測", 日本天文学会2022年秋季年会, Z225b (新潟+オンライン, 2022.9)

3. 川島由依, 生駒大洋, "ヘイズを持つ系外惑星の大気透過スペクトルモデル：ヘイズ粒子の成長と沈降の影響", 日本地球惑星科学連合2015年大会 (幕張, 2015.5)

4. 川島由依, 生駒大洋, "トランジット低質量系外惑星の透過スペクトルモデル", 日本惑星科学会秋季講演会 (石垣, 2013.11)

5. 川島由依, "惑星大気の透過スペクトルの理論的推定", 天文・天体物理若手 夏の学校 (蔵王, 2013.7)

Seminars

1. "Subaru/IRD high-resolution spectroscopy of a T-type brown dwarf and investigation of its atmospheric properties with high-resolution spectrum model ExoJAX" (National Astronomical Observatory of Japan, Tokyo, Japan, 2024.2)

2. "系外惑星大気の特徴付け：大気スペクトルモデルの構築と観測データへの適用" (京都大学, 2023.11)

3. "Retrieving 
Atmospheric Properties of Exoplanets and Brown Dwarfs" (Astrobiology Center, Tokyo, Japan, 2023.9)

4. "Retrieval of
Atmospheric Properties of Exoplanets and Brown Dwarfs" (UCL, London, UK, 2023.7)

5. "系外惑星の大気の特徴付け" (神奈川大学, 2023.4)

6. "Retrieval of
 Atmospheric Properties of Exoplanets and Brown Dwarfs" (Osservatorio Astrofisico di Arcetri, INAF, Florence, Italy, 2023.2)

7. "Transmission spectra of hazy exoplanet atmospheres: Exploration of dependence on UV irradiation intensity and metallicity, and application to extremely low-density planet Kepler-51b" (National Astronomical Observatory of Japan, Tokyo, Japan, 2019.6)

8. "Effect of UV irradiation intensity and metallicity on transmission spectra of hazy exoplanet atmospheres" (Leiden University, The Netherlands, 2019.5)

9. "Theoretical modeling of spectra of exoplanet atmospheres with haze and clouds" (University of Oxford, UK, 2018.11)

10. "Theoretical modeling of transmission spectra of exoplanet atmospheres with hydrocarbon haze and applications to multi-wavelength transit observations" (University of Amsterdam, The Netherlands, 2018.11)

11. "Theoretical modeling of transmission spectra of exoplanet atmospheres with hydrocarbon haze and applications to multi-wavelength transit observations" (The University of Tokyo (Komaba), Japan, 2018.8)

12. "Theoretical modeling of transmission spectra of exoplanet atmospheres with hydrocarbon haze and applications to multi-wavelength transit observations" (Jet Propulsion Laboratory, United States, 2018.8)

13. "Transmission spectrum models of exoplanet atmospheres with haze: Effect of creation, growth, and settling of haze particles" (Observatoire de la Côte d'Azur, France, 2017.2)

14.  "ヘイズを持つ系外惑星の大気透過スペクトルモデル" (東京工業大学, 2014.9)

Outreach

1. "太陽系の外の惑星「系外惑星」の環境" (花山宇宙分化財団 金曜天文講話, 2025.1)

2. "Atmospheres of Planets around Other Stars" (Space Cafe Tokyo, 2020.10)