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A New Equation of State for Astrophysical Simulations
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abstract
We generate a new complete equation of state (EOS) of nuclear matter for a wide range of temperatures, densities, and proton fractions ready for use in astrophysical simulations of supernovae and neutron star mergers. Our previous two papers tabulated the EOS at over 180,000 grid points in the temperature range $T$ = 0 to 80 MeV, the density range $n_B$ = 10$^{-8}$ to 1.6 fm$^{-3}$, and the proton fraction range $Y_P$ = 0 to 0.56. In this paper we combine these data points using a suitable interpolation scheme to generate a single equation of state table on a finer grid. This table is thermodynamically consistent and conserves entropy during adiabatic compression tests. We present various thermodynamic quantities and the composition of matter in the new EOS, along with several comparisons with existing EOS tables. Our equation of state table is available for download.
Forward citations
Cited by 3 Pith papers
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On the nature of oscillating modes of proto-neutron stars
A new energy-based classifier separates proto-neutron star oscillation modes into four families and identifies the dominant high-frequency gravitational-wave feature as the PNS fundamental mode.
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The impact of hyperons on neutron star mergers: gravitational waves, mass ejection and black hole formation
Hyperonic equations of state raise the dominant postmerger gravitational-wave frequency by a few percent and reduce the prompt black hole formation threshold by about 0.05 solar masses.
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Universal relations applied to proto-neutron star generated gravitational waves from three-dimensional core collapse supernova simulations
Against four Chimera core-collapse supernova simulations, most published universal relations for proto-neutron-star oscillations track the simulated gravitational-wave peak frequencies only during short post-bounce intervals.
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