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Leonidas Moustakas

Photo of Leonidas Moustakas


4800 Oak Grove Drive
M/S 169-506

Pasadena, CA 91109





Curriculum Vitae:

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Member of:

Science Division

Deputy Division Manager


  • PhD., Astrophysics, UC Berkeley (1998)
  • M.S., Astronomy, UC Berkeley (1994)
  • B.S., Astronomy, University of Arizona (1991)
  • B.S., Physics, University of Arizona (1991)

Professional Experience

  • Jet Propulsion Laboratory – Science Division
    • Principal Scientist (2022-present)
    • Deputy Manager (2022–present)
  • Jet Propulsion Laboratory – Astrophysics & Space Sciences Section
    • Section Manager (2013–2022)
    • Scientist (2005-2006)
  • Space Telescope Science Institute, Postdoc with the Spitzer/GOODS-Legacy project (2002-2005)
  • University of Oxford, UK, Postdoc with the Observational Cosmology Group (1999-2002)

Research Interests

Leonidas is an observational cosmologist, working on problems in galaxy formation and evolution, and the nature of dark matter. Leonidas is a member of the Euclid Dark Energy mission which launches in 2023, and is working on programs with the Hubble Space Telescope and the Zwicky Transient Facility to search for multiply-imaged gravitationally-lensed supernovae, and with the James Webb Space Telescope to measure the properties of dark matter to unprecedented precision.

Selected Publications

Full Bibliography

  1. Lazar, A. et al, 2021, “Out of sight, out of mind? The impact of correlated clustering in substructure lensing,”
  2. Brennan, S et al, 2019, “Quantifying the power spectrum of small-scale structure in semi-analytic galaxies,”
  3. Cyr-Racine, F-Y et al, 2019, “Beyond subhalos: Probing the collective effect of the Universe’s small-scale structure with gravitational lensing,”
  4. Moustakas, L.A. 2017, Nature Astronomy, "Tuning pulsars to listen in on massive galaxies,"
  5. Cyr-Racine, F.-Y., Moustakas, L.A., et al. 2016, Physical Reviews D, "Dark census: Statistically detecting the satellite populations of distant galaxies,"
  6. Merten, J. et al. 2015, Astrophysical Journal, "CLASH: The Concentration-Mass Relation of Galaxy Clusters,"
  7. Pullen, A.R. et al. 2014, Astrophysical Journal, "Nonlinear Evolution of Dark Matter Subhalos and Applications to Warm Dark Matter,"
  8. Patel, B. et al. 2014, Astrophysical Journal, "Three Gravitationally Lensed Supernovae behind CLASH Galaxy Clusters,"
  9. Keeton, C.R. and Moustakas, L.A. 2009, Astrophysical Journal, "A New Channel for Detecting Dark Matter Substructure in Galaxies: Gravitational Lens Time Delays,"
  10. Moustakas, L.A. et al. 2007, Astrophysical Journal Letters, "A Strong-Lens Survey in AEGIS: The Influence of Large-Scale Structure,"
  11. Moustakas, L.A. and Metcalf, R.B. 2003, Monthly Notices of the Royal Astronomical Society, "Detecting dark matter substructure spectroscopically in strong gravitational lenses,"
  12. Moustakas, L.A. and Somerville, R.S. 2002, Astrophysical Journal, "The Masses, Ancestors, and Descendants of Extremely Red Objects: Constraints from Spatial Clustering,"
  13. Moustakas, L.A. et al. 1997, Astrophysical Journal, "Colors and K-Band Counts of Extremely Faint Field Galaxies,"