Observational study of mass transport unevenly distributed in terrestrial planetary and satellite systems by mass spectrometry of ejected material

• Project/Area Number: 20K04039
• Research Category: Grant-in-Aid for Scientific Research (C)
• Allocation Type: Multi-year Fund
• Section: 一般
• Review Section: Basic Section 17010:Space and planetary sciences-related
• Research Institution: Osaka University
• Principal Investigator: Yokota Shoichiro 大阪大学, 大学院理学研究科, 准教授 (40435798)
• Project Period (FY): 2020-04-01 – 2023-03-31
• Project Status: Completed (Fiscal Year 2022)
• Budget Amount: ¥3,120,000 (Direct Cost: ¥2,400,000、Indirect Cost: ¥720,000); Fiscal Year 2022: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2021: ¥910,000 (Direct Cost: ¥700,000、Indirect Cost: ¥210,000); Fiscal Year 2020: ¥1,300,000 (Direct Cost: ¥1,000,000、Indirect Cost: ¥300,000)
• Keywords: 質量分析 / 超高層大気 / 月 / 外気圏 / 大気散逸 / スパッタリング / 地球型惑星 / 衛星 / 物質輸送

Outline of Research at the Start

地球や月で見られる物質輸送（大気や表面物質の放出及び外来物質の吸収）は、太陽系の惑星や小型天体にとって普遍的な現象である。物質輸送は惑星・衛星間に物質の移動も生じさせる。物質輸送の定量な理解は隕石試料分析のみならず惑星・衛星系の進化を考える上でも重要である。本研究では地球や月の周回探査機による質量分析データを利用して各天体に対して放出及び供給される物質を網羅的に査定し、地球・月系に起きている物質輸送を定量的に評価し、その物理機構の解明やモデル化を目指す。火星衛星探査計画（MMX）による火星・衛星系物質輸送の観測にも本研究成果を展開する。

Outline of Final Research Achievements

Using mass spectrometry data from Earth and lunar orbiting spacecraft, I evaluated the mass transport occurring in the Earth-Moon system. A method was developed to quantitatively identify nitrogen ions and molecular ions as well as oxygen ions that escape from the Earth based on observation data from the Arase spacecraft. Using the calculated composition ratios of dissipated ions, I showed that the ionospheric supply source gradually shifts to lower altitudes and latitudes with the passage of magnetic storms. Using observation data from the lunar explorer KAGUYA, I investigated the distribution of emitted refractory ions and showed that it is possible to distinguish whether the source material is primordial or has undergone evolution. The results were used to examine the observation plan by the mass spectrometer for the Martian Mission Exploration (MMX).

Academic Significance and Societal Importance of the Research Achievements

宇宙機搭載の質量分析装置によって地球から放出する大気の組成比を求めることで、大気進化の様子を調べた。月から放出する粒子を調べることで、月など小天体の成り立ちの情報が得られることを示した。火星とフォボスでも同様に構成粒子が放出していることが期待されるため、火星衛星探査計画MMXに搭載する質量分析器の将来観測計画の検討に、この研究成果を利用した。本成果は広く惑星環境の研究に役立つと期待できる。

Research Products

• [Int'l Joint Research] IRAP/Laboratoire de Physique des Plasmas(フランス)
• [Int'l Joint Research] Max-Planck-Institut(ドイツ)
• [Journal Article] BepiColombo mission confirms stagnation region of Venus and reveals its large extend (2022)
  • Author(s): M. Persson, et al. (incl. K. Masunaga)
  • Journal Title: Nature Communications Volume: 13 Issue: 1 Pages: 7743-7743
  • DOI: 10.1038/s41467-022-35061-3
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Direct observations of energy transfer from resonant electrons to whistler-mode waves in magnetosheath of Earth (2022)
  • Author(s): Kitamura N et al
  • Journal Title: Nature Communications Volume: 13 Issue: 1 Pages: 6259-6259
  • DOI: 10.1038/s41467-022-33604-2
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] LatHyS global hybrid simulation of the BepiColombo second Venus flyby (2022)
  • Author(s): Aizawa S.、Persson M.、Menez T.、Andre N.、Modolo R.、Genot V.、Sanchez-Cano B.、Volwerk M.、Chaufray J.-Y.、Baskevitch C.、Heyner D.、Saito Y.、Harada Y.、Leblanc F.、Barthe A.、Penou E.、Fedorov A.、Sauvaud J.-A.、Yokota S.、Auster U.、Richter I.、Mieth J.、Horbury T.S.、Louarn P.、Owen C.J.、Murakami G.
  • Journal Title: Planetary and Space Science Volume: 218 Pages: 105499-105499
  • DOI: 10.1016/j.pss.2022.105499
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Collaborative Research Activities of the Arase and Van Allen Probes (2022)
  • Author(s): Miyoshi Y.、Shinohara I.、Ukhorskiy S.、Claudepierre S. G.、Mitani T.、Takashima T.、Hori T.、Santolik O.、Kolmasova I.、Matsuda S.、Kasahara Y.、Teramoto M.、Katoh Y.、Hikishima M.、Kojima H.、Kurita S.、Imajo S.、Higashio N.、Kasahara S.、Yokota S.、Asamura K.、Kazama Y.、Wang S.-Y.、Jun C.-W.、Kasaba Y.、et al.
  • Journal Title: Space Science Reviews Volume: 218 Issue: 5 Pages: 38-38
  • DOI: 10.1007/s11214-022-00885-4
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Mesospheric ionization during substorm growth phase (2022)
  • Author(s): Murase K.、Kataoka R.、Nishiyama T.、Nishimura K.、Hashimoto T.、Tanaka Y.、Kadokura A.、Tomikawa Y.、Tsutsumi M.、Ogawa Y.、Uchida H. A.、Sato K.、Kasahara S.、Mitani T.、Yokota S.、Hori T.、Keika K.、Takashima T.、Kasahara Y.、et al.
  • Journal Title: Journal of Space Weather and Space Climate Volume: 12 Pages: 18-18
  • DOI: 10.1051/swsc/2022012
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Signatures of Auroral Potential Structure Extending Through the Near‐Equatorial Inner Magnetosphere (2022)
  • Author(s): Imajo S.、Miyoshi Y.、Asamura K.、Shinohara I.、Nos? M.、Shiokawa K.、Kasahara Y.、Kasaba Y.、Matsuoka A.、Kasahara S.、Yokota S.、Keika K.、Hori T.、Shoji M.、Nakamura S.、Teramoto M.
  • Journal Title: Geophysical Research Letters Volume: 49 Issue: 10 Pages: 1-10
  • DOI: 10.1029/2022gl098105
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Statistical Survey of Arase Satellite Data Sets in Conjunction With the Finnish Riometer Network (2022)
  • Author(s): Thomas. N.、Kero. A.、Miyoshi Y.、Shiokawa K.、Hyotyla M.、Raita T.、Kasahara Y.、Shinohara I.、Matsuda S.、Nakamura S.、Kasahara S.、Yokota S.、Keika K.、Hori T.、Mitani T.、Takashima T.、Asamura K.、Kazama Y.、Wang S.‐Y.、Jun C.‐W.、Higashio N.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 127 Issue: 5 Pages: 1-13
  • DOI: 10.1029/2022ja030271
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Analysis of Electron Precipitation and Ionospheric Density Enhancements Due To Hiss Using Incoherent Scatter Radar and Arase Observations (2022)
  • Author(s): Ma Q.、Xu W.、Sanchez E. R.、Marshall R. A.、Bortnik J.、Reyes P. M.、Varney R. H.、Kaeppler S. R.、Miyoshi Y.、Matsuoka A.、Kasahara Y.、Matsuda S.、Tsuchiya F.、Kumamoto A.、Kasahara S.、Yokota S.、Keika K.、Hori T.、Mitani T.、Nakamura S.、Kazama Y.、Wang S.‐Y.、Jun C.‐W.、Shinohara I.、Tam S. W.‐Y.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 127 Issue: 8 Pages: 1-15
  • DOI: 10.1029/2022ja030545
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] BepiColombo Mio Observations of Low-Energy Ions During the First Mercury Flyby: Initial Results (2022)
  • Author(s): Harada, Y., S. Aizawa, Y. Saito, N. Andre, M. Persson, D. Delcourt, L. Z. Hadid, M. Fraenz, S. Yokota, A. Fedorov, W. Miyake, E. Penou, A. Barthe, J. A. Sauvaud, B. Katra, S. Matsuda, G. Murakami
  • Journal Title: Geophys. Res. Lett. Volume: 49 Issue: 17
  • DOI: 10.1029/2022gl100279
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Superfast precipitation of energetic electrons in the radiation belts of the Earth (2022)
  • Author(s): Zhang Xiao-Jia、Artemyev Anton、Angelopoulos Vassilis、Tsai Ethan、Wilkins Colin、Kasahara Satoshi、Mourenas Didier、Yokota Shoichiro、Keika Kunihiro、Hori Tomoaki、Miyoshi Yoshizumi、Shinohara Iku、Matsuoka Ayako
  • Journal Title: Nature Communications Volume: 13 Issue: 1 Pages: 1611-1611
  • DOI: 10.1038/s41467-022-29291-8
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Martian moons exploration MMX: sample return mission to Phobos elucidating formation processes of habitable planets (2022)
  • Author(s): Kuramoto Kiyoshi et al.
  • Journal Title: Earth, Planets and Space Volume: 74 Issue: 1 Pages: 12-12
  • DOI: 10.1186/s40623-021-01545-7
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Preferential Energization of Lower‐Charge‐State Heavier Ions in the Near‐Earth Magnetotail (2022)
  • Author(s): Keika K.、Kasahara S.、Yokota S.、Hoshino M.、Seki K.、Amano T.、Kistler L. M.、Nos? M.、Miyoshi Y.、Hori T.、Shinohara I.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 127 Issue: 1 Pages: 1-20
  • DOI: 10.1029/2021ja029786
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] An event study on broadband electric field noises and electron distributions in the lunar wake boundary (2022)
  • Author(s): Nishino Masaki N.、Kasahara Yoshiya、Harada Yuki、Saito Yoshifumi、Tsunakawa Hideo、Kumamoto Atsushi、Yokota Shoichiro、Takahashi Futoshi、Matsushima Masaki、Shibuya Hidetoshi、Shimizu Hisayoshi、Miyashita Yukinaga、Goto Yoshitaka、Ono Takayuki
  • Journal Title: Earth, Planets and Space Volume: 74 Issue: 1 Pages: 9-9
  • DOI: 10.1186/s40623-021-01566-2
  • Peer Reviewed / Open Access
• [Journal Article] Transport Path of Cold‐Dense Plasmas in the Dusk Magnetotail Plasma Sheet: MMS Observations (2022)
  • Author(s): Nishino M. N.、Hasegawa H.、Saito Y.、Kitamura N.、Miyashita Y.、Nagai T.、Yokota S.、Russell C. T.、Gershman D. J.、Giles B. L.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 127 Issue: 1
  • DOI: 10.1029/2021ja029747
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] The Mars system revealed by the Martian Moons eXploration mission (2022)
  • Author(s): Ogohara Kazunori、Nakagawa Hiromu、Aoki Shohei et al.
  • Journal Title: Earth, Planets and Space Volume: 74 Issue: 1 Pages: 1-1
  • DOI: 10.1186/s40623-021-01417-0
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Science operation plan of Phobos and Deimos from the MMX spacecraft (2021)
  • Author(s): Nakamura Tomoki、Ikeda Hitoshi、Kouyama Toru、Nakagawa Hiromu et al.
  • Journal Title: Earth, Planets and Space Volume: 73 Issue: 1 Pages: 227-227
  • DOI: 10.1186/s40623-021-01546-6
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Comparative Study of Electric Currents and Energetic Particle Fluxes in a Solar Flare and Earth Magnetospheric Substorm (2021)
  • Author(s): Artemyev Anton、Zimovets Ivan、Sharykin Ivan、Nishimura Yukitoshi、Downs Cooper、Weygand James、Fiori Robyn、Zhang Xiao-Jia、Runov Andrei、Velli Marco、Angelopoulos Vassilis、Panasenco Olga、Russell Christopher T.、Miyoshi Yoshizumi、Kasahara Satoshi、et al
  • Journal Title: The Astrophysical Journal Volume: 923 Issue: 2 Pages: 151-151
  • DOI: 10.3847/1538-4357/ac2dfc
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] In situ observations of ions and magnetic field around Phobos: the mass spectrum analyzer (MSA) for the Martian Moons eXploration (MMX) mission (2021)
  • Author(s): Yokota Shoichiro、Terada Naoki、Matsuoka Ayako、Murata Naofumi、Saito Yoshifumi、Delcourt Dominique、Futaana Yoshifumi、Seki Kanako、Schaible Micah J.、Asamura Kazushi、Kasahara Satoshi、Nakagawa Hiromu、Nishino Masaki N.、Nomura Reiko、Keika Kunihiro、Harada Yuki、Imajo Shun
  • Journal Title: Earth, Planets and Space Volume: 73 Issue: 1 Pages: 216-216
  • DOI: 10.1186/s40623-021-01452-x
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Study of an Equatorward Detachment of Auroral Arc From the Oval Using Ground‐Space Observations and the BATS‐R‐US-CIMI Model (2021)
  • Author(s): Yadav Sneha、Shiokawa K.、Oyama S.、et al.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 12
  • DOI: 10.1029/2020ja029080
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Penetration of MeV electrons into the mesosphere accompanying pulsating aurorae (2021)
  • Author(s): Miyoshi Y.、Hosokawa K.、Kurita S.、Oyama S.-I.、Ogawa Y.、Saito S.、Shinohara I.、Kero A.、Turunen E.、Verronen P. T.、Kasahara S.、Yokota S.、Mitani T.、Takashima T.、Higashio N.、Kasahara Y.、Matsuda S.、Tsuchiya F.、Kumamoto A.、Matsuoka A.、Hori T.、Keika K.、Shoji M.、Teramoto M.、Imajo S.、Jun C.、Nakamura S.
  • Journal Title: Scientific Reports Volume: 11 Issue: 1 Pages: 13724-13724
  • DOI: 10.1038/s41598-021-92611-3
  • NAID: 120007142020
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Role of Ducting in Relativistic Electron Loss by Whistler‐Mode Wave Scattering (2021)
  • Author(s): Artemyev A. V.、Demekhov A. G.、Zhang X.‐J.、Angelopoulos V.、Mourenas D.、Fedorenko Yu V.、Maninnen J.、Tsai E.、Wilkins C.、Kasahara S.、Miyoshi Y.、Matsuoka A.、Kasahara Y.、Mitani T.、Yokota S.、Keika K.、Hori T.、Matsuda S.、Nakamura S.、Kitahara M.、Takashima T.、Shinohara I.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 11
  • DOI: 10.1029/2021ja029851
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Global Maps of Solar Wind Electron Modification by Electrostatic Waves Above the Lunar Day Side: Kaguya Observations (2021)
  • Author(s): Harada Yuki、Kasahara Yoshiya、Nishino Masaki N.、Kurita Satoshi、Saito Yoshifumi、Yokota Shoichiro、Kumamoto Atsushi、Takahashi Futoshi、Shimizu Hisayoshi
  • Journal Title: Geophysical Research Letters Volume: 48 Issue: 17
  • DOI: 10.1029/2021gl095260
  • Peer Reviewed
• [Journal Article] First Simultaneous Observation of a Night Time Medium‐Scale Traveling Ionospheric Disturbance From the Ground and a Magnetospheric Satellite (2021)
  • Author(s): Kawai K.、Shiokawa K.、Otsuka Y.、Oyama S.、Kasaba Y.、Kasahara Y.、Tsuchiya F.、Kumamoto A.、Nakamura S.、Matsuoka A.、Imajo S.、Kazama Y.、Wang S.‐Y.、Tam S. W. Y.、Chang T. F.、Wang B. J.、Asamura K.、Kasahara S.、Yokota S.、Keika K.、Hori T.、Miyoshi Y.、Jun C.、Shoji M.、Shinohara I.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 9
  • DOI: 10.1029/2020ja029086
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Magnetic Field and Energetic Particle Flux Oscillations and High‐Frequency Waves Deep in the Inner Magnetosphere During Substorm Dipolarization: ERG Observations (2021)
  • Author(s): Miyashita Yukinaga、Chang Tzu‐Fang、Miyoshi Yoshizumi、Hori Tomoaki、Kadokura Akira、Kasahara Satoshi et al.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 9
  • DOI: 10.1029/2020ja029095
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Pre-flight Calibration and Near-Earth Commissioning Results of the Mercury Plasma Particle Experiment (MPPE) Onboard MMO (Mio) (2021)
  • Author(s): Y. Saito, D. Delcourt, M. Hirahara S. Barabash, N. Andre, T. Takashima, K. Asamura, S. Yokota et al.o, M. Fujimoto, N. Terada, K. Keika, BepiColombo Mio/MPPE Team
  • Journal Title: Space Science Reviews Volume: 217 Issue: 5 Pages: 70-70
  • DOI: 10.1007/s11214-021-00839-2
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Characterization and Calibration of High‐Energy Electron Instruments Onboard the Arase Satellite (2021)
  • Author(s): Park I.、Miyoshi Y.、Mitani T.、Hori T.、Takashima T.、Kurita S.、Shinohara I.、Kasahara S.、Yokota S.、Keika K.、Claudepierre S. G.、Looper M. D.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 7
  • DOI: 10.1029/2021ja029110
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Preliminary Statistical Comparisons of Spin‐Averaged Electron Data From Arase and Van Allen Probes Instruments (2021)
  • Author(s): Szab‐Roberts M?ty?s、Shprits Yuri Y.、Allison Hayley J.、Vasile Ruggero、Smirnov Artem G.、Aseev Nikita A.、Drozdov Alexander Y.、Miyoshi Yoshizumi、Claudepierre Seth G.、Kasahara Satoshi、Yokota Shoichiro、Mitani Takefumi、Takashima Takeshi、Higashio Nana、Hori Tomo、Keika Kunihiro、Imajo Shun、Shinohara Iku
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 7
  • DOI: 10.1029/2020ja028929
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Evening Side EMIC Waves and Related Proton Precipitation Induced by a Substorm (2021)
  • Author(s): Yahnin A. G.、Popova T. A.、Demekhov A. G.、Lubchich A. A.、Matsuoka A.、Asamura K.、Miyoshi Y.、Yokota S.、Kasahara S.、Keika K.、Hori T.、Tsuchiya F.、Kumamoto A.、Kasahara Y.、Shoji M.、Kasaba Y.、Nakamura S.、Shinohara I.、Kim H.、Noh S.、Raita T.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 7
  • DOI: 10.1029/2020ja029091
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Contribution of Electron Pressure to Ring Current and Ground Magnetic Depression Using RAM‐SCB Simulations and Arase Observations During 7?8 November 2017 Magnetic Storm (2021)
  • Author(s): Kumar S.、Miyoshi Y.、Jordanova V. K.、Engel M.、Asamura K.、Yokota S.、Kasahara S.、Kazama Y.、Wang S.‐Y.、Mitani T.、Keika K.、Hori T.、Jun C.、Shinohara I.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 6
  • DOI: 10.1029/2021ja029109
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Energy Transfer Between Hot Protons and Electromagnetic Ion Cyclotron Waves in Compressional Pc5 Ultra‐low Frequency Waves (2021)
  • Author(s): Kitamura N.、Shoji M.、Nakamura S.、Kitahara M.、Amano T.、Omura Y.、Hasegawa H.、Boardsen S. A.、Miyoshi Y.、Katoh Y.、Teramoto M.、Saito Y.、Yokota S.、Hirahara M.、Gershman D. J.、Giles B. L.、Russell C. T.、Strangeway R. J.、Ahmadi N.、Lindqvist P.‐A.、Ergun R. E.、Fuselier S. A.、Burch J. L.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 5 Pages: 1-25
  • DOI: 10.1029/2020ja028912
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Low-altitude ion upflow observed by EISCAT and its effects on supply of molecular ions in the ring current detected by Arase (ERG) (2021)
  • Author(s): Takada, M., Seki, K., Ogawa, Y., Keika, K., Kasahara, S., Yokota, S., et al.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 5
  • DOI: 10.1029/2020ja028951
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] A Feasible Study of <i>In-Situ</i> Measurements of Light Isotopes and Organic Molecules with High Resolution Mass Spectrometer MULTUM on the OKEANOS Mission (2021)
  • Author(s): ITO Motoo、OKADA Tatsuaki、KEBUKAWA Yoko、AOKI Jun、KAWAI Yosuke、MATSUMOTO Jun、CHUJO Toshihiro、NAKAMURA Ryosuke、YANO Hajime、YOKOTA Sho-ichiro、TOYODA Michisato、YURIMOTO Hisayoshi、WATANABE Motoki、IKEDA Ryota、KUBO Yuki、GRAND Noel、COTTIN Herve、BUCH Arnaud、SZOPA Cyril、MORI Osamu
  • Journal Title: TRANSACTIONS OF THE JAPAN SOCIETY FOR AERONAUTICAL AND SPACE SCIENCES, AEROSPACE TECHNOLOGY JAPAN Volume: 19 Issue: 4 Pages: 477-484
  • DOI: 10.2322/tastj.19.477
  • NAID: 130008062313
  • ISSN: 1884-0485
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] Data‐Driven Simulation of Rapid Flux Enhancement of Energetic Electrons With an Upper‐Band Whistler Burst (2021)
  • Author(s): Saito S., Kurita S., Miyoshi Y., Kasahara S., Yokota S., Keika K., Hori T., Kasahara Y., Matsuda S., Shoji M., Nakamura S., Matsuoka A., Imajo S., Shinohara I.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 4
  • DOI: 10.1029/2020ja028979
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Multi‐Event Analysis of Plasma and Field Variations in Source of Stable Auroral Red (SAR) Arcs in Inner Magnetosphere During Non‐Storm‐Time Substorms (2021)
  • Author(s): Inaba, Y., K. Shiokawa, S.-I. Oyama, Y. Otsuka, M. Connors, I. Schofield, Y. Miyoshi, S. Imajo, A. Shinbori, Y. Gololobov, Y. Kazama, S. -Y. Wang, S. W. Y. Tam, T.-F. Chang, B. -J. Wang, K. Asamura, S. Yokota, S. Kasahara, K. Keika, T. Hori, A. Matsuoka, Y. Kasahara, A. Kumamoto, S. Matsuda, Y. Kasaba et al.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 4
  • DOI: 10.1029/2020ja029081
  • NAID: 120007175394
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Investigation of Small‐Scale Electron Density Irregularities Observed by the Arase and Van Allen Probes Satellites Inside and Outside the Plasmasphere (2021)
  • Author(s): Thomas N.、Shiokawa K.、Miyoshi Y.、Kasahara Y.、Shinohara I.、Kumamoto A.、Tsuchiya F.、Matsuoka A.、Kasahara S.、Yokota S.、Keika K.、Hori T.、Asamura K.、Wang S.‐Y.、Kazama Y.、Tam S. W.‐Y.、Chang T.‐F.、Wang B.‐J.、Wygant J.、Breneman A.、Reeves G.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 3 Pages: 118-118
  • DOI: 10.1029/2020ja027917
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Energy‐Resolved Detection of Precipitating Electrons of 30-100 keV by a Sounding Rocket Associated With Dayside Chorus Waves (2021)
  • Author(s): Sugo S.、Kawashima O.、Kasahara S.、Asamura K.、Nomura R.、Miyoshi Y.、Ogawa Y.、Hosokawa K.、Mitani T.、Namekawa T.、Sakanoi T.、Fukizawa M.、Yagi N.、Fedorenko Y.、Nikitenko A.、Yokota S.、Keika K.、Hori T.、Koehler C.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 126 Issue: 3 Pages: 111-111
  • DOI: 10.1029/2020ja028477
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Plasma and Field Observations in the Magnetospheric Source Region of a Stable Auroral Red (SAR) Arc by the Arase Satellite on 28 March 2017 (2020)
  • Author(s): Inaba Y.、Shiokawa K,、Oyama S.、Otsuka Y.、Oksanen A.、Shinbori A.、Gololobov A. Y.、Miyoshi Y.、Kazama Y.、Wang S.‐Y.、Tam S. W. Y.、Chang T.‐F.、Wang B.‐J.、Yokota S.、Kasahara S.、Keika K.、Hori T.、Matsuoka A.、Kasahara Y.、Kumamoto A.、Kasaba Y.、Tsuchiya F.、Shoji Masafumi、Shinohara Iku、Stolle Claudia
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 125 Issue: 10 Pages: 118-118
  • DOI: 10.1029/2020ja028068
  • NAID: 120007146021
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Arase Observation of the Source Region of Auroral Arcs and Diffuse Auroras in the Inner Magnetosphere (2020)
  • Author(s): Shiokawa K.、Nos? M.、Imajo S.、Tanaka Y.‐M.、Miyoshi Y.、Hosokawa K.、Connors M.、Engebretson M.、Kazama Y.、Wang S.‐Y.、Tam S. W. Y.、Chang Tzu‐Fang、Wang Bo‐Jhou、Asamura K.、Kasahara S.、Yokota S.、Hori T.、Keika K.、Kasaba Y.、Shoji M.、Kasahara Y.、Matsuoka A.、Shinohara I.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 125 Issue: 8 Pages: 125-125
  • DOI: 10.1029/2019ja027310
  • Peer Reviewed / Open Access / Int'l Joint Research
• [Journal Article] Observations of the Source Region of Whistler Mode Waves in Magnetosheath Mirror Structures (2020)
  • Author(s): Kitamura N.、Omura Y.、Nakamura S.、Amano T.、Boardsen S. A.、Ahmadi N.、Le Contel O.、Lindqvist P.‐A.、Ergun R. E.、Saito Y.、Yokota S.、Gershman D. J.、Paterson W. R.、Pollock C. J.、Giles B. L.、Russell C. T.、Strangeway R. J.、Burch J. L.
  • Journal Title: Journal of Geophysical Research: Space Physics Volume: 125 Issue: 5 Pages: 122-122
  • DOI: 10.1029/2019ja027488
  • Peer Reviewed / Int'l Joint Research
• [Journal Article] KAGUYA observation of global emissions of indigenous carbon ions from the Moon (2020)
  • Author(s): Yokota Shoichiro、Terada Kentaro、Saito Yoshifumi、Kato Daiba、Asamura Kazushi、Nishino Masaki N.、Shimizu Hisayoshi、Takahashi Futoshi、Shibuya Hidetoshi、Matsushima Masaki、Tsunakawa Hideo
  • Journal Title: Science Advances Volume: 6 Issue: 19 Pages: 16-16
  • DOI: 10.1126/sciadv.aba1050
  • Peer Reviewed / Open Access
• [Presentation] SS-520-3号機観測ロケット搭載LEPによる極域カスプでのイオン電子の観測 (2022)
  • Author(s): 横田勝一郎他
  • Organizer: 地球電磁気・地球惑星圏学会 第152回総会・講演会
• [Presentation] 宇宙プラズマ観測用質量分析装置の開発：太陽系探査への展開 (2022)
  • Author(s): 横田勝一郎他
  • Organizer: 地球電磁気・地球惑星圏学会 第152回総会・講演会
  • Invited
• [Presentation] 火星衛星探査機MMX搭載低エネルギーイオン質量分析器(MSA)の開発 (2022)
  • Author(s): 横田勝一郎他
  • Organizer: JAXA/ISAS宇宙科学に関する室内実験シンポジウム
• [Presentation] Nitrogen and oxygen ions from the Earth's ionosphere observed by the Arase satellite (2021)
  • Author(s): S. Yokota, K. Tsuda, et al.,
  • Organizer: JpGU Meeting 2021
  • Int'l Joint Research
• [Presentation] Development of an engineering model (EM) of the Mass spectrum Analyzer (MSA) for Mars Moons eXploration (MMX) (2021)
  • Author(s): S. Yokota et al.,
  • Organizer: 地球電磁気・地球惑星圏学会 第150回総会・講演会
• [Presentation] 火星衛星探査計画MMX MSA EM開発状況報告 (2021)
  • Author(s): 横田勝一郎他,
  • Organizer: 第 65 回宇宙科学技術連合講演会
• [Presentation] Global emissions of carbon ions from the total lunar surfac (2020)
  • Author(s): 横田勝一郎, 他
  • Organizer: 日本地球惑星科学連合2020年大会
  • Int'l Joint Research
• [Presentation] Geomagnetic N+/O+ variation in the Ring Current Observed by the Arase (2020)
  • Author(s): 津田 洸一郎, 横田 勝一郎, 他
  • Organizer: 日本地球惑星科学連合2020年大会
  • Int'l Joint Research
• [Presentation] Evaluation of response characteristics of the XEP onboard the Arase spacecraft (2020)
  • Author(s): 植田 晃平, …, 横田 勝一郎, 他
  • Organizer: 日本地球惑星科学連合2020年大会
  • Int'l Joint Research
• [Presentation] 火星衛星探査計画MMX MSA開発状況報告 (2020)
  • Author(s): 横田勝一郎, 他
  • Organizer: 第 64 回宇宙科学技術連合講演会
• [Presentation] MMX 搭載用イオンエネルギー質量分析器の性能評価 (2020)
  • Author(s): 出口雅樹, 横田勝一郎, 他
  • Organizer: 日本惑星科学会2020年秋季講演会
• [Presentation] In situ observations of ions and magnetic field around Phobos: Mass Spectrum Analyzer (MSA) for Mars Moons eXploration (MMX) (2020)
  • Author(s): 横田勝一郎, 他
  • Organizer: 地球電磁気・地球惑星圏学会第147回総会・講演会
• [Presentation] 地球型惑星衛星に起きている物質の供給と放出 (2020)
  • Author(s): 横田勝一郎, 他
  • Organizer: 第22回 惑星圏研究会
  • Invited
• [Remarks] 明滅オーロラとともに起こるオゾン破壊 宇宙からの高エネルギー電子が大気に及ぼす影響を実証
  • URL: https://resou.osaka-u.ac.jp/ja/research/2021/20210713_1
• [Remarks] 宇宙空間に流出する月の炭素を初観測
  • URL: https://resou.osaka-u.ac.jp/ja/research/2020/20200507_1