Shotaro's website

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Research

Research Interests

Martian system

Saturnian system

Peer-Reviewed Publications

  1. 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). Numerical prediction of changes in atmospheric chemical compositions during a solar energetic particle event on Mars. J. Geophys. Res. Space Physics, 128, e2022JA031250. https://doi.org/10.1029/2022JA031250 [PDF]
  2. 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). Photochemical and RadiatiOn Transport model for Extensive USe (PROTEUS). Earth, Planets and Space, 75, 140. https://doi.org/10.1186/s40623-023-01881-w
  3. Satoh, S., Tsuchiya, F., Sakai, S., Kasaba, Y., Yasuda, R., & Kimura, T. (2023). Interpretation of the north-south asymmetric oxygen aurora morphology on Europa using test particle simulation. J. Geophys. Res. Space Physics, 128, e2023JA031519. https://doi.org/10.1029/2023JA031519 [PDF]
  4. Nishioka, T., Seki, K., Sakata, R., Yamamoto, K., Terada, N., Sakai, S., Shinagawa, H., & Nakayama, A. (2023). Study of atmospheric ion escape from exoplanet TOI-700 d: Venus analogs. J. Geophys. Res. Space Physics, 128, e2023JA031405. https://doi.org/10.1029/2023JA031405 [PDF]
  5. Yoshida, T., Aoki, S., Ueno, Y., Terada, N., Nakamura, Y., Shiobara, K., Yoshida, N., Nakagawa, H., Sakai, S., & Koyama, S. (2023). Strong depletion of 13C in CO induced by photolysis of CO2 in the Martian atmosphere calculated by a photochemical model. Planet. Sci. J., 4, 53. https://doi.org/10.3847/PSJ/acc030 [PDF]
  6. Sakai, S., Seki, K., Terada, N., Shinagawa, H., Sakata, R., Tanaka, T., & Ebihara, Y. (2023). Enhanced ion escape rate during IMF rotation under weak intrinsic magnetic field conditions on a Mars-like planet. J. Geophys. Res. Space Physics, 128, e2022JA030510. https://doi.org/10.1029/2022JA030510 [PDF]
  7. Sakata, R., Seki, K., Sakai, S., Terada, N., Shinagawa, H., & Tanaka, T. (2022). Multispecies MHD study of ion escape at ancient Mars: Effects of an intrinsic magnetic field and solar XUV radiation. J. Geophys. Res. Space Physics, 127, e2022JA030427. https://doi.org/10.1029/2022JA030427
  8. 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). Formation mechanisms of the molecular ion polar plume and its contribution to ion escape from Mars. J. Geophys. Res. Space Physics, 127, e2021JA029750. https://doi.org/10.1029/2021JA029750
  9. Nakamura, Y., Terada, N., Leblanc, F., Rahmati, A., Nakagawa, H., Sakai, S., Hiruba, S., Kataoka, R., & Murase, K. (2022). Modeling of diffuse auroral emission at Mars: Contribution of MeV protons. J. Geophys. Res. Space Physics, 127, e2021JA029914. https://doi.org/10.1029/2021JA029914
  10. Yoshida, N., Terada, N., Nakagawa, H., Brain, D. A., Sakai, S., Nakamura, Y., Benna, M., & Masunaga, K. (2021). Seasonal and dust-related variations in the dayside thermospheric and ionospheric compositions of Mars observed by MAVEN/NGIMS. J. Geophys. Res. Planets, 126, e2021JE006926. https://doi.org/10.1029/2021JE006926
  11. Sakai, S., Seki, K., Terada, N., Shinagawa, H., Sakata, R., Tanaka, T., & Ebihara, Y. (2021). Effects of the IMF direction on atmospheric escape from a Mars-like planet under weak intrinsic magnetic field conditions. J. Geophys. Res. Space Physics, 126, e2020JA028485. https://doi.org/10.1029/2020JA028485 [PDF]
  12. Sakata, R., Seki, K., Sakai, S., Terada, N., Shinagawa, H., & Tanaka, T. (2020). Effects of an intrinsic magnetic field on ion loss from ancient Mars based on multispecies MHD simulations. J. Geophys. Res. Space Physics, 125, e2019JA026945. https://doi.org/10.1029/2019JA026945 [PDF]
  13. 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). Low electron temperatures observed at Mars by MAVEN on dayside crustal magnetic field lines. J. Geophys. Res. Space Physics, 124, 7629-7637. https://doi.org/10.1029/2019JA026961 [PDF]
  14. 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). Statistical study of heavy ion outflows from Mars observed in the Martian induced magnetotail by MAVEN. J. Geophys. Res. Space Physics, 124, 5482-5497. https://doi.org/10.1029/2018JA026452 [PDF]
  15. 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). Loss of the Martian atmosphere to space: Present-day loss rates determined from MAVEN observations and integrated loss through time. Icarus, 315, 146-157. https://doi.org/10.1016/j.icarus.2018.05.030
  16. Sakai, S., Seki, K., Terada, N., Shinagawa, H., Tanaka, T., & Ebihara, Y. (2018). Effects of a weak intrinsic magnetic field on atmospheric escape from Mars. Geophys. Res. Lett., 45, 9336-9343. https://doi.org/10.1029/2018GL079972 [PDF]
  17. 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). Cold dense ion outflow observed in the Martian induced magnetotail by MAVEN. Geophys. Res. Lett., 45, 5283-5289. https://doi.org/10.1029/2018GL077584 [PDF]
  18. Hamil, O., Cravens, T. E., Reedy, N. L., & Sakai, S. (2018). Fate of ice grains in Saturn's ionosphere. J. Geophys. Res. Space Physics, 123, 1429-1440. https://doi.org/10.1002/2017JA024616 [PDF]
  19. 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). Hot oxygen escape from Mars: Simple scaling with solar EUV irradiance. J. Geophys. Res. Space Physics, 122, 1102-1116. https://doi.org/10.1002/2016JA023461 [PDF]
  20. Sakai, S., Cravens, T. E., Omidi, N., Perry, M. E., & Waite Jr., J. H. (2016). Ion energy distributions and densities in the plume of Enceladus. Planet. Space Sci., 130, 60-79. https://doi.org/10.1016/j.pss.2016.05.007 [Accepted version]
  21. 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). Photoelectrons and solar ionizing radiation at Mars: Predictions vs. MAVEN observations. J. Geophys. Res. Space Physics, 121, 8859-8870. https://doi.org/10.1002/2016JA022677 [PDF]
  22. Sakai, S., & Watanabe, S. (2016). Plasma dynamics in Saturn's middle-latitude ionosphere and implications for magnetosphere-ionosphere coupling. Icarus, 274, 261-271. https://doi.org/10.1016/j.icarus.2016.03.009 [Accepted version]
  23. 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). Electron energetics in the Martian dayside ionosphere: Model comparisons with MAVEN data. J. Geophys. Res. Space Physics, 121. 7049-7066. https://doi.org/10.1002/2016JA022782 [PDF]
  24. 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). Model insights into energetic photoelectrons measured at Mars by MAVEN. Geophys. Res. Lett., 42, 8894-8900. https://doi.org/10.1002/2015GL065169 [PDF]
  25. 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). Early MAVEN Deep Dip campaign reveals theremosphere and ionosphere variability. Science, 350, aad0459. https://doi.org/10.1126/science.aad0459
  26. 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). MAVEN observations of the response of Mars to an interplanetary coronal mass ejection. Science, 350, aad0210. https://doi.org/10.1126/science.aad0210
  27. Ye, S. -Y., Gurnett, D. A., Kurth, W. S., Averkamp, T. F., Morooka, M., Sakai, S., & Wahlund, J. -E. (2014). Electron density inside Enceladus plume inferred from plasma oscillations excited by dust impacts. J. Geophys. Res. Space Physics, 119, 3373-3380. https://doi.org/10.1002/2014JA019861 [PDF]
  28. Sakai, S., Watanabe, S., Morooka, M. W., Holmberg, M. K. G., Wahlund, J. -E., Gurnett, D. A., & Kurth, W. S. (2013). Dust-plasma interaction through magnetosphere-ionosphere coupling in Saturn's plasma disk. Planet. Space Sci., 75. 11-16. https://doi.org/10.1016/j.pss.2012.11.003 [Accepted version]
  29. Sugiyama, K., Suzuki, A., Takahashi, J., Nakamura, T., Manabe, S., Sakai, S., Tsurumaki, R., Nakaoka, R., Tatsumi, S., Tani, I., Katoh, N., Umemoto, T., Oshikawa, T., Mikami, T., Kuramoto, K., Hayashi, Y. -Y., Nakagawa, Y., & Center for Planetary Science (2012), A repository for knowledge of planetary science serving by Center for Planetary Science (CPS). Planetary People, 21, 368-376 (in Japanese). https://doi.org/10.14909/yuseijin.21.4_368 [PDF]

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Last Update 26 February 2024