CV

Education

Ph.D in Physics, Caltech, 2025
M.S. in Physics, Caltech, 2024
B.A. in Physics, Cornell University, 2020

Work experience

2021-2025 : Graduate Research Assistant
- Caltech
- Duties includes: Updates and improvements to template
- Supervisor: Katerina Chatziioannou

Skills

Python
Data Analysis
- Bayesian Inference
- Stochastic Sampling
- Regression
C++
Mathematical Modeling

Publications

Inferring the neutron star equation of state with nuclear-physics informed semiparametric models

Ng, S., Legred, I., Suleiman, L., Landry, P., Traylor, L., & Read, J. (2025). "Inferring the neutron star equation of state with nuclear-physics informed semiparametric models." arXiv.

Neutron Stars: Robust Constraints on Dense Matter from Astrophysics

Legred, Isaac Norman (2025). "Neutron Stars: Robust Constraints on Dense Matter from Astrophysics." Ph.D. Dissertation, Caltech.

Unified nonparametric equation-of-state inference from the neutron-star crust to perturbative-QCD densities

Finch, E., Legred, I., Chatziioannou, K., Essick, R., Han, S., & Landry, P. (2025). "Unified nonparametric equation-of-state inference from the neutron-star crust to perturbative-QCD densities." arXiv.

Nonparametric extensions of nuclear equations of state: probing the breakdown scale of relativistic mean-field theory

Legred, I., Brodie, L., Haber, A., Essick, R., & Chatziioannou, K. (2025). "Nonparametric extensions of nuclear equations of state: probing the breakdown scale of relativistic mean-field theory." arXiv.

The interplay of astrophysics and nuclear physics in determining the properties of neutron stars

Golomb, J., Legred, I., Chatziioannou, K., & Landry, P. (2025). "The interplay of astrophysics and nuclear physics in determining the properties of neutron stars." Phys. Rev. D.

Nonlinear Alfvén-wave dynamics and premerger emission from crustal oscillations in neutron star mergers

Most, E. R., Kim, Y., Chatziioannou, K., & Legred, I. (2024). "Nonlinear Alfvén-wave dynamics and premerger emission from crustal oscillations in neutron star mergers." ApJL. 973, L37.

Using equation of state constraints to classify low-mass compact binary mergers

Golomb, J., Legred, I., Chatziioannou, K., Dietrich, T., et al. (2024). "Using equation of state constraints to classify low-mass compact binary mergers." Phys. Rev. D.

Assessing equation of state-independent relations for neutron stars with nonparametric models

Legred, I., Sy-Garcia, B. O., Chatziioannou, K., & Essick, R. (2024). "Assessing equation of state-independent relations for neutron stars with nonparametric models." Phys. Rev. D. 109, 023020.

Phase transition phenomenology with nonparametric representations of the neutron star equation of state

Essick, R., Legred, I., Chatziioannou, K., Han, S., & Landry, P. (2023). "Phase transition phenomenology with nonparametric representations of the neutron star equation of state." Phys. Rev. D. 108, 043013.

Simulating neutron stars with a flexible enthalpy-based equation of state parametrization in SpECTRE

Legred, I., Kim, Y., Deppe, N., Chatziioannou, K., Foucart, F., Hébert, F., Kidder, L. E. (2023). "Simulating neutron stars with a flexible enthalpy-based equation of state parametrization in SpECTRE." Phys. Rev. D. 107, 123017.

Implicit correlations within phenomenological parametric models of the neutron star equation of state

Legred, Isaac N., Chatziioannou, K., Essick, R., & Landry, P. (2022). "Implicit correlations within phenomenological parametric models of the neutron star equation of state." Phys. Rev. D. 105, 043016.

Impact of the PSR J0740+6620 radius constraint on the properties of high-density matter

Isaac Legred, Katerina Chatziioannou, Reed Essick, Sophia Han, Philippe Landry, "Impact of the PSR \({\mathrm J0740+6620}\) radius constraint on the properties of high-density matter." Phys. Rev. D, 2021.

Isaac Legred

CV