Astronomy and Astrophysics – Astrophysics – Solar and Stellar Astrophysics
Scientific paper
2011-03-26
Phys.Rev.C83:065808,2011
Astronomy and Astrophysics
Astrophysics
Solar and Stellar Astrophysics
updated version according to referee's comments. Phys. Rev. C in press
Scientific paper
10.1103/PhysRevC.83.065808
We generate a second equation of state (EOS) of nuclear matter for a wide range of temperatures, densities, and proton fractions for use in supernovae, neutron star mergers, and black hole formation simulations. We employ full relativistic mean field (RMF) calculations for matter at intermediate density and high density, and the Virial expansion of a non-ideal gas for matter at low density. For this EOS we use the RMF effective interaction FSUGold, whereas our earlier EOS was based on the RMF effective interaction NL3. The FSUGold interaction has a lower pressure at high densities compared to the NL3 interaction. We calculate the resulting EOS at over 100,000 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. We then interpolate these data points using a suitable scheme to generate a thermodynamically consistent equation of state table on a finer grid. We discuss differences between this EOS, our NL3 based EOS, and previous EOSs by Lattimer-Swesty and H. Shen et al for the thermodynamic properties, composition, and neutron star structure. The original FSUGold interaction produces an EOS, that we call FSU1.7, that has a maximum neutron star mass of 1.7 solar masses. A modification in the high density EOS is introduced to increase the maximum neutron star mass to 2.1 solar masses and results in a slightly different EOS that we call FSU2.1. The EOS tables for FSU1.7 and FSU2.1 are available for download.
Horowitz Charles J.
O'Connor Erin
Shen Guoyin
No associations
LandOfFree
A Second Relativistic Mean Field and Virial Equation of State for Astrophysical Simulations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with A Second Relativistic Mean Field and Virial Equation of State for Astrophysical Simulations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and A Second Relativistic Mean Field and Virial Equation of State for Astrophysical Simulations will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-94603