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Irina Sagert

Irina Sagert

Phone (505) 667-5033


  • Computational Physics and Applied Mathematics
  • Numerical modeling
  • Computational fluid dynamics (CFD)
  • Monte Carlo methods
  • Computational fluid dynamics applications in astrophysics
  • Computer and Computational Sciences
  • High performance computing
  • Nuclear and Particle Physics, Astrophysics, and Cosmology
  • Nuclear Physics
  • Astrophysics
  • Compact stars like white dwarfs and neutron stars


Kinetic Transport Simulations Monte Carlo Particle Codes - Code development, modeling of hydrodynamic and non-equilibrium flows (e.g. shock waves, fluid instabilities)
Computational Nuclear Astrophysics - Compact star physics, dense nuclear matter, phase transitions, density functional theory, Hartree-Fock simulations 


10/2010     Ph.D in Physics, Goethe University, Frankfurt, Germany

10/2006     Diploma in Physics, Goethe University, Frankfurt, Germany    




LANL Positions

Director's Postdoctoral Fellow (since 2015)


Professional Societies

American Physical Society 



Best Lecture Award, Carpathian Summer School of Physics, Sinaia, Romania (2014)

Provost's Travel Award for Women in Science, Indiana University, Bloomington, Indiana (2014)

Feodor-Lynen Fellowship, Alexander-von-Humboldt Foundation (2011 - 2012) 

HICforFAIR Fellowship, Helmholtz International Center for FAIR (2010)




  1. Sagert, I., G. I. Fann, F. J. Fattoyev, S. Postnikov, C. J. Horowitz (May 2016), Quantum Simulations of Nuclei and Nuclear Pasta with the Multi-resolution Adaptive Numerical Environment for Scientific Simulations, Phys. Rev. C 93 (5), 055801
  2. Sagert, I., J. Howell, A. Staber, T. Strother, D. Colbry, and W. Bauer (July 2015), Knudsen-number dependence of two-dimensional single-mode Rayleigh-Taylor fluid instabilities, Phys. Rev. E 92 (1), 013009
  3. Fischer, T., M. Hempel, I. Sagert, Y. Suwa, and J. Schaffner-Bielich (Feb. 2014), Symmetry energy impct in simulations of core-collapse supernovae, European Physical Journal A 50, 46
  4. Sagert, I., W. Bauer, D. Colbry, J. Howell, R. Pickett, A. Staber, and T. Strother (June 2014), Hydrodynamic shock wave studies within a kinetic Monte Carlo approach, Journal of Computational Physics 266, 191 - 213
  5. Nishimura, N., T. Fischer, F.-K. Thielemann, C. Froehlich, M. Hempel, R. Kaeppeli, G. Martinez-Pinedo, T. Rauscher, I. Sagert, and C. Winteler (Oct. 2012), Nucleosynthesis in Core-collapse Supernova Explosions Triggered by a Quark-Hadron Phase Transition, The Astrophys. Journal 758, 9
  6. Sagert, I., L. Tolos, D. Chatterjee, J. Schaffner-Bielich, and C. Sturm (2012), Soft nuclear equation of state from heavy-ion data and implications for compact stars, Phys. Rev. C 86 (4), 045802
  7. Fischer, T., I. Sagert, G. Pagliara, M. Hempel, J. Schaffner-Bielich, T. Rauscher, F.-K. Thielemann, R. Kaeppeli, G. Martinez-Pinedo, and M. Liebendoerfer (June 2011), Core-collapse Supernova Explosions Triggered by a Quark-Hadron Phase Transition During the Early Post-bounce Phase, Astrophys. Journal Suppl. 194, 39
  8. Weissenborn, S., I. Sagert, G. Pagliara, M. Hempel, and J. Schaffner-Bielich (Oct. 2011), Quark Matter in Massive Compact Stars, Astrophys. Journal Lett. 740, L14
  9. Dasgupta, B., T. Fischer, S. Horiuchi, M. Liebendoerfer, A. Mirizzi, I. Sagert, and J. Schaffner-Bielich (May 2010), Detecting the QCD phase transition in the next Galactic supernova neutrino burst, Phys. Rev. D 81 (10), 103005
  10. Fischer, T., I. Sagert, M. Hempel, G. Pagliara, J. Schaffner-Bielich, and M. Liebendoerfer (June 2010), Signals of the QCD phase transition in core collapse supernovae - microphysical input and implications on the supernova dynamics, Classical and Quantum Gravity 27 (11), 114102
  11. Bauswein, A., H.-T. Janka, R. Oechslin, G. Pagliara, I. Sagert, J. Schaffner-Bielich, M. M. Hohle, and R. Neuhaeuser (July 2009), Mass Ejection by Strange Star Mergers and Observational Implications, Physical Review Letters 103(1), 011101
  12. Sagert, I., T. Fischer, M. Hempel, G. Pagliara, J. Schaffner-Bielich, A. Mezzacappa, F.-K. Thielemann, and M. Liebendoerfer (Feb. 2009), Signals of the QCD Phase Transition in Core-Collapse Supernovae, Physical Review Letters 102(8), 081101
  13. Sagert, I., J. Schaffner-Bielich (Oct. 2008), Pulsar kicks by anisotropic neutrino emission from quark matter in strong magnetic fields, Astronomy and Astrophysics 489, 281 - 289
  14. Sagert, I., M. Hempel, C. Greiner, and J. Schaffner-Bielich (May 2006), Compact stars for undergraduates, European Journal of Physics 27, 577-610