PTYS/LPL Faculty

Kuiper 527A


Isamu Matsuyama

Associate Professor

Ph.D., 2005, University of Toronto

Years with LPL: 2011 to present

Astrobiology, Exoplanets; Planetary Formation and Evolution, Lunar Studies, 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

Former Students

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

Current Postdocs

  • Antony Trinh

Former Postdocs

  • Ngai Ham Chan


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

Refereed publications (NASA ADS): Calendar Years 2017 through June 2020

Hay, H., Trinh, A., & Matsuyama, I. (2020). Powering the Galilean Satellites with Moon‐moon Tides. Geophys. Res. Lett., 47.

Bouley, S., Keane, J. T., Baratoux, D., Langlais, B., Matsuyama, I., Costard, F., Hewins, R., Payré, V., Sautter, V., Séjourné, A., Vanderhaeghe, O., Zanda, B. A thick crustal block revealed by reconstructions of early Mars highlands 2020NatGe..13..105B

Cruikshank, D. P., Umurhan, O. M., Beyer, R. A., Schmitt, B., Keane, J. T., Runyon, K. D., Atri, D., White, O. L., Matsuyama, I., Moore, J. M., McKinnon, W. B., Sandford, S. A., Singer, K. N., Grundy, W. M., Dalle Ore, C. M., Cook, J. C., Bertrand, T., Stern, S. A., Olkin, C. B., Weaver, H. A., Young, L. A., Spencer, J. R., Lisse, C. M., Binzel, R. P., Earle, A. M., Robbins, S. J., Gladstone, G. R., Cartwright, R. J., Ennico, K. Recent cryovolcanism in Virgil Fossae on Pluto 2019Icar..330..155C

Hay, H. C. F. C., Matsuyama, I. Tides Between the TRAPPIST-1 Planets 2019ApJ...875...22H

Nimmo, F., Matsuyama, I. Tidal dissipation in rubble-pile asteroids 2019Icar..321..715N

Hay, H. C. F. C., Matsuyama, I. Nonlinear tidal dissipation in the subsurface oceans of Enceladus and other icy satellites 2019Icar..319...68H

Matsuyama, I., Beuthe, M., Hay, H. C. F. C., Nimmo, F., Kamata, S. Ocean tidal heating in icy satellites with solid shells 2018Icar..312..208M

Hemingway, D. J., Matsuyama, I. Isostatic equilibrium in spherical coordinates and implications for crustal thickness on the Moon, Mars, Enceladus, and elsewhere 2017GeoRL..44.7695H

Hay, H. C. F. C., Matsuyama, I. Numerically modelling tidal dissipation with bottom drag in the oceans of Titan and Enceladus 2017Icar..281..342H

Available filesSizeCreated
PDF icon cv_matsuyama_2019.pdf52.43 KBAugust 11, 2019
Semester Course Day/Time Location Resources
Fall 2021 PTYS 505B-001 MW 12:30-1:45p.m. Kuiper 312
Fall 2019 PTYS 505B-001 TTH 9:30-10:45a.m. Kuiper 312 Syllabus
Course Page

Last updated on September 11, 2020