EOSDB: The Database for Nuclear EoS

Abstract

Nuclear equation of state (EoS) plays an important role in understanding the formation of compact objects such as neutron stars and black holes. The true nature of the EoS has been a matter of debate at any density range not only in the nuclear physics but also in the astronomy and astrophysics. We have constructed a database of EoSs by compiling data from the literature. Our database contains the basic properties of the nuclear EoS of symmetric nuclear matter and of pure neutron matter. It also includes the detailed information about the theoretical models, for example the adopted methods and assumptions in individual models. The novelty of the database is to consider new experimental probes such as the symmetry energy, its slope relative to the baryon density, and the incompressibility, which enables the users to check their model dependences. We demonstrate the performance of the EOSDB through the examinations of the model dependence among different nuclear EoSs. It is reveled that some theoretical EoSs, which is commonly used in astrophysics, do not satisfactorily agree with the experimental constraints.

30 pages, 5 figures, submitted to Publications of the Astronomical Society of Japan (revised)

References in corpus (7)

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• Constraints on the symmetry energy and neutron skins from experiments and theory
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Cited by in corpus (5)

• Equations of state for supernovae and compact stars
• Numerical Study of Stellar Core Collapse and Neutrino Emission Using the Nuclear Equation of State Obtained by the Variational Method
• Hadron-Quark Crossover and Hot Neutron Stars at Birth
• Neutron-skin values and matter and neutron radii determined from reaction cross sections of proton scattering on ${}^{12}$C, ${}^{40,48}$Ca, ${}^{58}$Ni, ${}^{208}$Pb
• Model-Independent Determination of the Tidal Deformability of a 1.4 $M_{\odot }$ Neutron Star from Gravitational-Wave Measurements