Isamu Matsuyama

PTYS/LPL Faculty

Kuiper 527A


Isamu Matsuyama


Ph.D., 2005, University of Toronto

Years with LPL: 2011 to present

Astrobiology, Exoplanets, Lunar Studies, Planetary Formation and Evolution, Planetary Geophysics, Theoretical Astrophysics, Titan & Outer Solar System, Planetary interiors, Theoretical modeling

Dr. Matsuyama is interested in the physics of planetary interiors and evolution, with an emphasis on understanding the processes that led to the extraordinary diversity of the solar system. He develops theoretical models which are used to interpret spacecraft and ground-based observations.

Current research interests involve improving our understanding of (1) the formation and evolution of the Moon by analysis of the global lunar figure, which provides a record of prior orbital and rotational states; and (2) characterization of the thermal and orbital evolution of icy satellites, with particular emphasis on determining the long-term survivability of their subsurface oceans.

Current Grants

  • Early dynamical evolution of the Moon with a subsurface magma ocean and finite rigidity; NASA Solar System Workings Program, PI
  • Consequences of dynamic tides in subsurface oceans; NASA Emerging Worlds Program, PI

  • Interior Structure, Stresses, and Tectonics of Planets; NASA Solar System Workings Program, PI
  • Subsurface Oceans in icy satellites; NASA Habitable Worlds Program, PI
  • Recent Activity in the Saturn System: Origins and Organic Composition of Red Streaks on Tethys; NASA Cassini Data Analysis (CDAP) Program, Co-I

  • The Deep Lunar Interior From Multi-Satellite Data Analysis; NASA Lunar Data Analysis (LDAP) Program, Co-I

  • True polar wander of terrestrial planets and its implications for the long- term stability of polar volatiles; NASA Solar System Workings Program, PI

Current Spacecraft Involvement

  • Io Volcano Observer (IVO): A proposed mission to the NASA Discovery Program, Co-I 

Former Spacecraft Involvement

  • NASA Gravity Recovery and Interior Laboratory (GRAIL), guest scientist

Student Collaborations/Advising

Former Students

  • Hamish Hay, 2020 (Ph.D. PTYS)
  • James Keane, 2017 (Ph.D. PTYS)

Former Postdocs

  • Antony Trinh
  • Ngai Ham Chan


Complete publications list available from: NASA ADS Author search: Isamu Matsuyama

Recent refereed publications (NASA ADS): Years 2019 through 2023

Gevorgyan, Yeva, Matsuyama, Isamu, & Ragazzo, Clodoaldo 2023, Monthly Notices of the Royal Astronomical Society. Equivalence between simple multilayered and homogeneous laboratory-based rheological models in planetary science

Downey, Brynna G., Nimmo, Francis, & Matsuyama, Isamu 2023, Icarus. The thermal-orbital evolution of the Earth-Moon system with a subsurface magma ocean and fossil figure

Rovira-Navarro, Marc, Matsuyama, Isamu, & Hay, Hamish C. F. C. 2023, The Planetary Science Journal. Thin-shell Tidal Dynamics of Ocean Worlds

Hay, H. C. F. C., Matsuyama, I., & Pappalardo, R. T. 2022, Journal of Geophysical Research (Planets). The High-Frequency Tidal Response of Ocean Worlds: Application to Europa and Ganymede

Matsuyama, Isamu, Trinh, Antony, & Keane, James T. 2021, The Planetary Science Journal. The Lunar Fossil Figure in a Cassini State

Johnson, Perianne E., Keane, James T., Young, Leslie A., & Matsuyama, Isamu 2021, The Planetary Science Journal. New Constraints on Pluto's Sputnik Planitia Ice Sheet from a Coupled Reorientation-Climate Model

Matsuyama, I., Keane, J. T., Trinh, A., Beuthe, M., Watters, T. R. 2021, Icarus Global tectonic patterns of the Moon

Downey, Brynna G., Nimmo, Francis, & Matsuyama, Isamu 2020, Monthly Notices of the Royal Astronomical Society. Inclination damping on Callisto

Schenk, Paul, Matsuyama, Isamu, & Nimmo, Francis 2020, Geophysical Research Letters. A Very Young Age for True Polar Wander on Europa From Related Fracturing

Hay, Hamish C. F. C., Trinh, Antony, & Matsuyama, Isamu 2020, Geophysical Research Letters. Powering the Galilean Satellites with Moon-Moon Tides

Bouley, Sylvain, Keane, James Tuttle, Baratoux, David, Langlais, Benoit, Matsuyama, Isamu, Costard, Francois, Hewins, Roger, Payré, Valerie, Sautter, Violaine, Séjourné, Antoine, Vanderhaeghe, Olivier, & Zanda, Brigitte 2020, Nature Geoscience. A thick crustal block revealed by reconstructions of early Mars highlands

Cruikshank, Dale P., Umurhan, Orkan M., Beyer, Ross A., Schmitt, Bernard, Keane, James T., Runyon, Kirby D., Atri, Dimitra, White, Oliver L., Matsuyama, Isamu, Moore, Jeffrey M., McKinnon, William B., Sandford, Scott A., Singer, Kelsi N., Grundy, William M., Dalle Ore, Cristina M., Cook, Jason C., Bertrand, Tanguy, Stern, S. Alan, Olkin, Catherine B., Weaver, Harold A., Young, Leslie A., Spencer, John R., Lisse, Carey M., Binzel, Richard P., Earle, Alissa M., Robbins, Stuart J., Gladstone, G. Randall, Cartwright, Richard J., & Ennico, Kimberly 2019, Icarus. Recent cryovolcanism in Virgil Fossae on Pluto

Hay, Hamish C. F. C. & Matsuyama, Isamu 2019, The Astrophysical Journal. Tides Between the TRAPPIST-1 Planets

Nimmo, Francis & Matsuyama, Isamu 2019, Icarus. Tidal dissipation in rubble-pile asteroids

Hay, Hamish C. F. C. & Matsuyama, Isamu 2019, Icarus. Nonlinear tidal dissipation in the subsurface oceans of Enceladus and other icy satellites

Attachment Size
cv_matsuyama_2019.pdf 52.43 KB
Semester Course Day/Time Location Resources
Fall 2023 PTYS 505B-1 Tuesday, Thursday 11:00a.m.-12:15p.m. Kuiper 312 Syllabus

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