Microscopic calculation of the equation of state of nuclear matter and neutron star structure

Abstract

We present results for neutron star models constructed with a new equation of state for nuclear matter at zero temperature. The ground state is computed using the Auxiliary Field Diffusion Monte Carlo (AFDMC) technique, with nucleons interacting via a semi-phenomenological Hamiltonian including a realistic two-body interaction. The effect of many-body forces is included by means of additional density-dependent terms in the Hamiltonian. In this letter we compare the properties of the resulting neutron-star models with those obtained using other nuclear Hamiltonians, focusing on the relations between mass and radius, and between the gravitational mass and the baryon number.

modified version with a slightly different Hamiltonian and parametrization of the EOS

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• Neutron Star Observations: Prognosis for Equation of State Constraints
• Quantum Monte Carlo calculation of the equation of state of neutron matter
• Quantum Monte Carlo calculations of symmetric nuclear matter
• Auxiliary Field Diffusion Monte Carlo calculation of nuclei with A<40 with tensor interactions
• The Auxiliary Field Diffusion Monte Carlo Method for Nuclear Physics and Nuclear Astrophysics

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