神戸大学　理学研究科　惑星学専攻・惑星学科　Home　Page

Masahiko ARAKAWA

　Professor
　Graduate School of Science
　Faculty of Science
　Center for Planetary Science

• e-mail: masahiko.arakawa(at)penguin.kobe-u.ac.jp
• Office: Science and Technology Bldg 3, Room 101
• Mailing address:
  Department of Planetology, Graduate School of Science, Kobe University, Nada, Kobe 657-8501, Japan
• Experimental Planetary Science Laboratory URL

Research Interests:

   I try to reproduce various phenomena occurred in the Solar System 4.6 billions ago, so I conduct impact experiments and deformation experiments to study the planetary formation process, evolution and tectonics of planets and satellites.

Recent Publications:　

• Arakawa, M., Okazaki, M., Nakamura, M., Jutzi, M., Yasui, M., and Hasegawa, S., “Dispersion and shattering strength of rocky and frozen planetesimals studied by laboratory experiments and numerical simulations”, Icarus 373, 114777, 2022.
• Yasui, M., Tazawa, T., Hashimoto, R., Arakawa, M., Ogawa, K., “Impacts may provide heat for aqueous alteration and organic solid formation on asteroid parent bodies”, Commun. Earth Environ. 2, 95, 2021.
• Shimaki, Y., Arakawa, M., “Tensile strength and elastic properties of fine-grained ice aggregates: Implications for crater formation on small icy bodies”, Icarus 369, 114646, 2021.
• Honda, R., Arakawa, M. et al., “Resurfacing processes on asteroid (162173) Ryugu caused by an artificial impact of Hayabusa2’s Small Carry-on Impactor”, Icarus 366, 114530, 2021.
• Wada, K., Ishibashi, K., Kimura, H., Arakawa, M., et al., “Size of particles ejected from an artificial impact crater on asteroid 162173 Ryugu”, Astron. Astrophys. 647, A43, 2021.
• Suzuki, A., Fujita, Y., Harada, S., et al. (18th), “Experimental study concerning the oblique impact of low- and high-density projectiles on sedimentary rocks”, Planet. Space Sci. 195, 105141, 2021.
• Saiki, T., Mimasu, Y., Takei, Y., et al. (23rd), “Motion reconstruction of the small carry-on impactor aboard Hayabusa2”, Astrodynamics 4 (4), 289-308, 2020.
• Saiki, T., Takei, Y., Mimasu, Y., Sawada, H., Ogawa, N., Ono, G., Yoshikawa, K., Terui, F., Arakawa, M., Sugita, S., Watanabe, S., Yoshikawa, M., Nakazawa, S., Tsuda, Y., “Hayabusa2's kinetic impact experiment: Operational planning and results”, Acta Astron. 175, 362-374, 2020.
• Kadono, T., Arakawa, M., Honda, R., Ishibashi, K., Ogawa, K., Sakatani N., Sawada, H., Shimaki, Y., Shirai, K., Sugita, S., Wada, K., “Impact Experiment on Asteroid (162173) Ryugu: Structure beneath the Impact Point Revealed by In Situ Observations of the Ejecta Curtain”, Astrophys. J. Lett.899 (1), L22, 2020.
• Arakawa et al., “An artificial impact on the asteroid (162173) Ryugu formed a crater in the gravity-dominated regime”, Science vol. 368, pp. 67-71, 2020.
• Matsue, K., Yasui, M., Arakawa, M., Hasegawa, S., "Measurements of seismic waves induced by high-velocity impacts: Implications for seismic shaking surrounding impact craters on asteroids”, Icarus 338, 113520, 2020.
• Yasui, M., Arakawa, M., Yoshida, Y., Matsue K., Takano, S., "Effects of oblique impacts on the impact strength of porous gypsum and glass spheres: Implications for the collisional disruption of planetesimals and thermal evolution", Icarus 335, 113414, 2020.

Academic Associations:　

• Japanese Society for Planetary Science (Japanese)
• Japanese Society of Snow and Ice
• Japan Geoscience Union
• American Geoscience Union