Updated Constraints on the Neutron Star Equation of State

par Dr Melissa Mendes (TU Darmstadt)

mardi 29 avr. 2025, 14:00 → 15:00 Europe/Paris

100/2-A201 - Salle A201 (IJCLab)

 

The calculation of the equation of state (EOS) of nuclear matter beyond saturation density ($n_{\mathrm{sat}}$) remains an open research problem. However, observations of neutron stars have proven crucial to the study of matter at these higher densities, especially since the detection of gravitational waves from binary neutron star mergers by LIGO and the determination of simultaneous mass-radius contours from pulse profile modeling by NICER have significantly constrained the EOS beyond $n_{\mathrm{sat}}$. In addition, recent advances in the calculation of nucleon interactions from chiral effective field theory (cEFT) determine the EOS down to 1.5 $n_{\mathrm{sat}}$, providing an independent constraint. In this talk I will discuss the most updated EOS constraints from recent cEFT calculations and NICER data, including the pulsar J0437-4715, within an open-source Bayesian framework.

 

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How to reach the seminar room:

Whereabouts of the laboratory on the Paris-Saclay campus

Bat. 100, general room map