Publications

Peer-reviewed papers

2026

• Asymmetrically distributed Kelvin-Helmholtz instability at Venusian magnetosphere.
  Yan, M., Lei, J., Terada, N., Zhang, B., Dang, T., Sakata, R., Sakai, S., & Ma, Y. (2026). Geophys. Res. Lett., 53, e2026GL121691.
• Effects of stellar XUV spectra on atmospheric escape from a Mars-like planet orbiting inactive low-mass stars.
  Sakai, S., Nakayama, A., Seki, K., Terada, N., Shinagawa, H., Sakata, R., Leblanc, F., Brain, D. A., & Tanaka, T. (2026). Mon. Not. R. Astron. Soc., 54 (4), stag156.
• Dawn-dusk asymmetry of the Io plasma torus derived from Io’s auroral footprints observed by Juno-UVS.
  Satoh, S., Hue, V., Tsuchiya, F., Sakai, S., Kasaba, Y., Kita, H., Kagitani, M., Moirano, A., Bonfond, B., Misawa, H., & Yasuda, R. (2026). Planet. Sci. J., 7, 34.

2025

• Magnetic field experiment at Phobos and in space around Mars by the Martian Moons eXploration (MMX) mission.
  Matsuoka, A., Yokota, S., Murata, N., Harada, Y., Imajo, S., Terada, N., Keika, K., Masunaga, K., Sakai, S., Nakagawa, H., Asamura, S., Kasahara, Y., & Saito, Y. (2025). Prog. Earth Planet. Sci., 12, 67.
• Pre-flight performance of the ion energy mass spectrum analyzer for the Martian Moons eXploration (MMX) mission.
  Yokota, S., Matsuoka, A., Murata, N., Satio, Y., Asamura, K., Kasahara, S., Delcourt, D., Hadid, L. Z., Terada, N., Keika, K., Harada, Y., Nakagawa, H., Masunaga, K., Sakai, S., Futaana, Y., Imajo, S., Seki, K., Nishino, N. M., & Kitamura, Y. (2025). Prog. Earth Planet. Sci., 12, 51.

2024 and earlier

• C⁺ 133.5 nm emission mechanisms on Mars revealed by the MAVEN observations.
  Sakai, S., Nakagawa, H., Deighan, J., Jain, S. K., Masunaga, K., Tsuchiya, F., Terada, N., Mayyasi, M., Schneider, N. M., Mitchell, D. L., Mazelle, C., Benna, M., Lillis, R. J., Murakami, G., Curry, S. M., & Seki, K. (2024). Ap. J., 977, 226.
• Different behavior of density perturbations between dayside and nightside in the Martian thermosphere and the ionosphere associated with atmospheric gravity waves.
  Nakagawa, H., England, S. L., Kumar A., Benna, M., Harada, Y., Sakai, S., Terada, N., Seki, K., & Yoshida, N. (2024). J. Geophys. Res. Space Physics, 129, e2024JA032988.
• Comprehensive comparison of two global multis-species MHD Models of Mars.
  Sun, W., Sakata, R., Ma, Y, Seki, K., Russell, C. T., Terada, N., Sakai, S., Shinagawa, H., Brain, D., & Toth, G. (2024). Earth and Space Sci., 11, e2024EA003698.
• A technique for retrieving the exospheric number density distribution from pickup ion ring distributions.
  Masunaga, K., Terada, N., Leblanc, F., Harada, Y., Hara, T., Sakai, S., Yokota, S., Seki, K., Yamazaki, A., McFadden, J. P., & Usui, T. (2024). Planet. Sci. J., 5, 180.
• Changes in the plasma sheet conditions at Europa’s orbit retrieved from lead angle of the satellite auroral footprints.
  Satoh, S., Tsuchiya, F., Sakai, S., Kasaba, Y., Nichols, J. D., Kimura, T., Yasuda, R., & Hue, V. (2024). Geophys. Res. Lett., 51, e2024GL110079.
• Ray tracing for Jupiter’s icy moon ionospheric occultation of Jovian auroral radio sources.
  Yasuda, R., Kimura, T., Misawa, H., Tsuchiya, F., Cecconi, B., Kasaba, Y., Satoh, S., Sakai, S., & Louis, C. K. (2024). J. Geophys. Res. Space Physics, 129, e2023JA032454. 
• Reduced water loss due to photochemistry on terrestrial planets in the runaway greenhouse phase around pre-main-sequence M dwarfs.
  Kawamura, Y., Yoshida, T., Terada, N., Nakamura, Y., Koyama, S., Karyu, H., Terada, K., & Sakai, S. (2024). Ap. J., 967, 95.
• Effects of an intrinsic magnetic field on ion escape from ancient Mars based on MAESTRO multifluid MHD simulations.
  Sakata, R., Seki, K., Terada, N., Sakai, S., & Shinagawa, H. (2024). J. Geophys. Res. Space Physics, 129, e2023JA032320.
• On the periodic variation of the ion density in the Martian dayside ionosphere during the regional dust storm in September 2016.
  Hara, T., Masunaga, K., Terada, N., Sakai, S., Osanai, T., Seki, K., Fowler, C. M., Hanley, K. G., McFadden, J. P., & Curry, S. M. (2024). J. Geophys. Res. Space Physics, 129, e2023JA031848.
• Numerical prediction of changes in atmospheric chemical compositions during a solar energetic particle event on Mars.
  Nakamura, Y., Leblanc, F., Terada, N., Hiruba, S., Murata, I., Nakagawa, H., Sakai, S., Aoki, S., Piccialli, A., Willame, Y., Neary, L., Vandaele, A. C., Murase, K., & Kataoka, R. (2023). J. Geophys. Res. Space Physics, 128, e2022JA031250.
• Photochemical and RadiatiOn Transport model for Extensive USe (PROTEUS).
  Nakamura, Y., Terada, N., Koyama, S., Yoshida, T., Karyu, H., Terada, K., Kuroda, T., Kamada, A., Murata, I., Sakai, S., Suzuki, Y., Kobayashi, M., & Leblanc, F. (2023). Earth, Planets and Space, 75, 140.
• Interpretation of the north-south asymmetric oxygen aurora morphology on Europa using test particle simulation.
  Satoh, S., Tsuchiya, F., Sakai, S., Kasaba, Y., Yasuda, R., & Kimura, T. (2023). J. Geophys. Res. Space Physics, 128, e2023JA031519.
• Study of atmospheric ion escape from exoplanet TOI-700 d: Venus analogs.
  Nishioka, T., Seki, K., Sakata, R., Yamamoto, K., Terada, N., Sakai, S., Shinagawa, H., & Nakayama, A. (2023). J. Geophys. Res. Space Physics, 128, e2023JA031405.
• Strong depletion of ¹³C in CO induced by photolysis of CO₂ in the Martian atmosphere calculated by a photochemical model.
  Yoshida, T., Aoki, S., Ueno, Y., Terada, N., Nakamura, Y., Shiobara, K., Yoshida, N., Nakagawa, H., Sakai, S., & Koyama, S. (2023). Planet. Sci. J., 4, 53.
• Enhanced ion escape rate during IMF rotation under weak intrinsic magnetic field conditions on a Mars-like planet.
  Sakai, S., Seki, K., Terada, N., Shinagawa, H., Sakata, R., Tanaka, T., & Ebihara, Y. (2023). J. Geophys. Res. Space Physics, 128, e2022JA030510.
• Multispecies MHD study of ion escape at ancient Mars: Effects of an intrinsic magnetic field and solar XUV radiation.
  Sakata, R., Seki, K., Sakai, S., Terada, N., Shinagawa, H., & Tanaka, T. (2022). J. Geophys. Res. Space Physics, 127, e2022JA030427.
• Formation mechanisms of the molecular ion polar plume and its contribution to ion escape from Mars.
  Sakakura, K., Seki, K., Sakai, S., Sakata, R., Shinagawa, H., Brain, D. A., McFadden, J. P., Halekas, J. S., DiBraccio, G. A., Jakosky, B. M., Terada, N., & Tanaka, T. (2022). J. Geophys. Res. Space Physics, 127, e2021JA029750.
• Modeling of diffuse auroral emission at Mars: Contribution of MeV protons.
  Nakamura, Y., Terada, N., Leblanc, F., Rahmati, A., Nakagawa, H., Sakai, S., Hiruba, S., Kataoka, R., & Murase, K. (2022). J. Geophys. Res. Space Physics, 127, e2021JA029914.
• Seasonal and dust-related variations in the dayside thermospheric and ionospheric compositions of Mars observed by MAVEN/NGIMS.
  Yoshida, N., Terada, N., Nakagawa, H., Brain, D. A., Sakai, S., Nakamura, Y., Benna, M., & Masunaga, K. (2021). J. Geophys. Res. Planets, 126, e2021JE006926.
• Effects of the IMF direction on atmospheric escape from a Mars-like planet under weak intrinsic magnetic field conditions.
  Sakai, S., Seki, K., Terada, N., Shinagawa, H., Sakata, R., Tanaka, T., & Ebihara, Y. (2021). J. Geophys. Res. Space Physics, 126, e2020JA028485.
• Effects of an intrinsic magnetic field on ion loss from ancient Mars based on multispecies MHD simulations.
  Sakata, R., Seki, K., Sakai, S., Terada, N., Shinagawa, H., & Tanaka, T. (2020). J. Geophys. Res. Space Physics, 125, e2019JA026945.
• Low electron temperatures observed at Mars by MAVEN on dayside crustal magnetic field lines.
  Sakai, S., Cravens, T. E., Andersson, L., Fowler, C. M., Mitchell, D. L., Mazelle, C., Thiemann, E. M. B., Eparvier, F. G., Brain, D. A., & Seki, K. (2019). J. Geophys. Res. Space Physics, 124, 7629-7637.
• Statistical study of heavy ion outflows from Mars observed in the Martian induced magnetotail by MAVEN.
  Inui, S., Seki, K., Sakai, S., Brain, D. A., Hara, T., McFadden, J. P., Halekas, J. S., Mitchell, D. L., DiBraccio, G. A., & Jakosky, B. M. (2019). J. Geophys. Res. Space Physics, 124, 5482-5497.
• Loss of the Martian atmosphere to space: Present-day loss rates determined from MAVEN observations and integrated loss through time.
  Jakosky, B. M., Brain, D., Chaffin, M., Curry, S., Deighan, J., Grebowsky, J., Halekas, J., Leblanc, F., Lillis, R., Luhmann, J. G., Andersson, L., Andre, N., Andrews, D., Baird, D., Baker, D., Bell, J., Benna, M., Bhattacharyya, D., Bougher, S., Bowers, C., Chamberlin, P., Chaufray, J. -Y., Clarke, J., Collinson, G., Combi, M., Connerney, J., Connour, K., Correira, J., Crabb, K., Crary, F., Cravens, T., Crismani, M., Delory, G., Dewey, R., DiBraccio, G., Dong, C., Dong, Y., Dunn, P., Egan, H., Elrod, M., England, S., Eparvier, F., Ergun, R., Eriksson, A., Esman, T., Espley, J., Evans, S., Fallows, K., Fang, X., Fillingim, M., Flynn, C., Fogle, A., Fowler, C., Fox, J., Fujimoto, M., Garnier, P., Girazian, Z., Groeller, H., Gruesbeck, J., Hamil, O., Hanley, K. G., Hara, T., Harada, Y., Hermann, J., Holmberg, M., Holsclaw, G., Houston, S., Inui, S., Jain, S., Jolitz, R., Kotova, A., Kuroda, T., Larson, D., Lee, Y., Lee, C., Lefevre, F., Lentz, C., Lo, D., Lugo, R., Ma, Y. -J., Mahaffy, P., Marquette, M. L., Matsumoto, Y., Mayyasi, M., Mazelle, C., McClintock, W., McFadden, J., Medvedev, A., Mendillo, M., Meziane, K., Milby, Z., Mitchell, D., Modolo, R., Montmessin, F., Nagy, A., Nakagawa, H., Narvaez, C., Olsen, K., Pawlowski, D., Peterson, W., Rahmati, A., Roeten, K., Romanelli, N., Ruhunusiri, S., Russell, C., Sakai, S., Schneider, N., Seki, K., Sharrar, R., Shaver, S., Siskind, D. E., Slipski, M., Soobiah, Y., Steckiewicz, M., Stevens, M. H., Stewart, I., Stiepen, A., Stone, S., Tenishev, V., Terada, N., Terada, K., Thiemann, E., Tolson, R., Toth, G., Trovato, J., Vogt, M., Weber, T., Withers, P., Xu, S., Yelle, R., Yiğit, E., & Zurek, R. (2018). Icarus, 315, 146-157.
• Effects of a weak intrinsic magnetic field on atmospheric escape from Mars.
  Sakai, S., Seki, K., Terada, N., Shinagawa, H., Tanaka, T., & Ebihara, Y. (2018). Geophys. Res. Lett., 45, 9336-9343.
• Cold dense ion outflow observed in the Martian induced magnetotail by MAVEN.
  Inui, S., Seki, K., Namekawa, T., Sakai, S., Brain, D. A., Hara, T., McFadden, J. P., Halekas, J. S., Mitchell, D. L., Mazelle, C., DiBraccio, G. A., & Jakosky, B. M. (2018). Geophys. Res. Lett., 45, 5283-5289.
• Fate of ice grains in Saturn’s ionosphere.
  Hamil, O., Cravens, T. E., Reedy, N. L., & Sakai, S. (2018). J. Geophys. Res. Space Physics, 123, 1429-1440. 
• Hot oxygen escape from Mars: Simple scaling with solar EUV irradiance.
  Cravens, T. E., Rahmati, A., Fox, J. L., Lillis, R., Bougher, S., Luhmann, J., Sakai, S., Deighan, J., Lee, Y., Combi, M., & Jakosky, B. (2017). J. Geophys. Res. Space Physics, 122, 1102-1116.
• Ion energy distributions and densities in the plume of Enceladus.
  Sakai, S., Cravens, T. E., Omidi, N., Perry, M. E., & Waite Jr., J. H. (2016). Planet. Space Sci., 130, 60-79.
• Photoelectrons and solar ionizing radiation at Mars: Predictions vs. MAVEN observations.
  Peterson, W. K., Thiemann, E. M. B., Epavier, F. G., Andersson, L., Fowler, C. M., Larson, D., Mitchell, D., Mazelle, C., Fontenla, J., Evans, J. S., Xu, S., Liemohn, M., Bougher, S., Sakai, S., Cravens, T. E., Elrod, M. K., Benna, M., Mahaffy, P., & Jakosky, B. (2016). J. Geophys. Res. Space Physics, 121, 8859-8870.
• Plasma dynamics in Saturn’s middle-latitude ionosphere and implications for magnetosphere-ionosphere coupling.
  Sakai, S., & Watanabe, S. (2016). Icarus, 274, 261-271.
• Electron energetics in the Martian dayside ionosphere: Model comparisons with MAVEN data.
  Sakai, S., Andersson, L., Cravens, T. E., Mitchell, D. L., Mazelle, C., Rahmati, A., Fowler, C. M., Bougher, S. W., Thiemann, E. M. B., Eparvier, F. G., Fontenla, J. M., Mahaffy, P. R., Connerney, J. E. P., & Jakosky, B. M. (2016). J. Geophys. Res. Space Physics, 121. 7049-7066.
• Model insights into energetic photoelectrons measured at Mars by MAVEN.
  Sakai, S., Rahmati, A., Mitchell, D. L., Cravens, T. E., Bougher, S. W., Mazelle, C., Peterson, W. K., Eparvier, F. G., Fontenla, J. M., & Jakosky, B. M. (2015). Geophys. Res. Lett., 42, 8894-8900. 
• Early MAVEN Deep Dip campaign reveals theremosphere and ionosphere variability.
  Bougher, S., Jakosky, B., Halekas, J., Grebowsky, J., Luhmann, J., Mahaffy, P., Connerney, J., Eparvier, F., Ergun, R., Larson, D., McFadden, J., Mitchell, D., Schneider, N., Zurek, R., Mazelle, C., Andersson, L., Andrews, D., Baird, D., Baker, D. N., Bell, J. M., Benna, M., Brain, D., Chaffin, M., Chamberlin, P., Chaufray, J. -Y., Clarke, J., Collinson, G., Combi, M., Crary, F., Cravens, T., Crismani, M., Curry, S., Curtis, D., Deighan, J., Delory, G., Dewey, R., DiBraccio, G., Dong, C., Dong, Y., Dunn, P., Elrod, M., England, S., Eriksson, A., Espley, J., Evans, S., Fang, X., Fillingim, M., Fortier, K., Fowler, C., Fox, J., Gröller, H., Guzewich, S., Hara, T., Harada, Y., Holsclaw, G., Jain, S. K., Jolitz, R., Leblanc, F., Lee, C. O., Lee, Y., Lefevre, F., Lillis, R., Livi, R., Lo, D., Ma, Y., Mayyasi, M., McClintock, W., McEnulty, T., Modolo, R., Montmessin, F., Morooka, M., Nagy, A., Olsen, K., Peterson, W., Rahmati, A., Ruhunusiri, S., Russell, C. T., Sakai, S., Sauvaud, J. -A., Seki, K., Steckiewicz, M., Stevens, M., Stewart, A. I. F., Stiepen, A., Stone, S., Tenishev, V., Thiemann, E., Tolson, R., Toublanc, D., Vogt, M., Weber, T., Withers, P., Woods, T., & Yelle, R. (2015). Science, 350, aad0459.
• MAVEN observations of the response of Mars to an interplanetary coronal mass ejection.
  Jakosky, B., Grebowsky, J., Luhmann, J., Connerney, J., Eparvier, F., Ergun, R., Halekas, J., Larson, D., Mahaffy, P., McFadden, J., Mitchell, D. L., Schneider, N., Zurek, R., Bougher, S., Brain, D., Ma, Y. J., Mazelle, C., Andersson, L., Andrews, D., Baird, D., Baker, D., Bell, J. M., Benna, M., Chaffin, M., Chamberlin, P., Chaufray, Y. -Y., Clarke, J., Collinson, G., Combi, M., Crary, F., Cravens, T., Crismani, M., Curry, S., Curtis, D., Deighan, J., Delory, G., Dewey, R., DiBraccio, G., Dong, C., Dong, Y., Dunn, P., Elrod, M., England, S., Eriksson, A., Espley, J., Evans, S., Fang, X., Fillingim, M., Fortier, K., Fowler, C. M., Fox, J., Gröller, H., Guzewich, S., Hara, T., Harada, Y., Holsclaw, G., Jain, S. K., Jolitz, R., Leblanc, F., Lee, C. O., Lee, Y., Lefevre, F., Lillis, R., Livi, R., Lo, D., Mayyasi, M., McClintock, W., McEnulty, T., Modolo, R., Montmessin, F., Morooka, M., Nagy, A., Olsen, K., Peterson, W., Rahmati, A., Ruhunusiri, S., Russell, C. T., Sakai, S., Sauvaud, J. -A., Seki, K., Steckiewicz, M., Stevens, M., Stewart, A. I. F., Stiepen, A., Stone, S., Tenishev, V., Thiemann, E., Tolson, R., Toublanc, D., Vogt, M., Weber, T., Withers, P., Woods, T., & Yelle, R. (2015). Science, 350, aad0210.
• Electron density inside Enceladus plume inferred from plasma oscillations excited by dust impacts.
  Ye, S. -Y., Gurnett, D. A., Kurth, W. S., Averkamp, T. F., Morooka, M., Sakai, S., & Wahlund, J. -E. (2014). J. Geophys. Res. Space Physics, 119, 3373-3380.
• Dust-plasma interaction through magnetosphere-ionosphere coupling in Saturn’s plasma disk.
  Sakai, S., Watanabe, S., Morooka, M. W., Holmberg, M. K. G., Wahlund, J. -E., Gurnett, D. A., & Kurth, W. S. (2013). Planet. Space Sci., 75. 11-16.
• 惑星科学研究センター (CPS) における知見アーカイブ.
  杉山耕一朗, 鈴木絢子, 高橋隼, 中村友昭, 真鍋翔, 堺正太朗, 鶴巻亮一, 中岡礼奈, 辰巳信平, 谷伊織, 加藤則行, 梅本隆史, 押川智美, 三上峻, 倉本圭, 林祥介, 中川義次, 惑星科学研究センター (2012). 遊星人(日本惑星科学会誌), 21, 368-376.