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- W1576159487 abstract "We introduce a parametrized high-density equation of state (EOS) in order to systematize the study of constraints placed by astrophysical observations on the nature of neutron-star matter. To obtain useful constraints, the number of parameters must be smaller than the number of EOS-related neutron-star properties measured, but large enough to accurately approximate the large set of candidate EOSs. We find that a parametrized EOS based on piecewise polytropes with 3 free parameters matches, to about 4% rms error, an extensive set of candidate EOSs at densities below the central density of $1.4{M}_{ensuremath{bigodot}}$ stars. Adding observations of more massive stars constrains the higher-density part of the EOS and requires an additional parameter. We obtain constraints on the allowed parameter space set by causality and by present and near-future astronomical observations with the least model dependence. Stringent constraints on the EOS parameter space are associated with the future measurement of the moment of inertia of PSR J0737-3039A combined with the maximum known neutron-star mass. We also present in an appendix a more efficient algorithm than has previously been used for finding points of marginal stability and the maximum angular velocity of stable stars." @default.
- W1576159487 created "2016-06-24" @default.
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- W1576159487 date "2009-06-22" @default.
- W1576159487 modified "2023-10-04" @default.
- W1576159487 title "Constraints on a phenomenologically parametrized neutron-star equation of state" @default.
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- W1576159487 doi "https://doi.org/10.1103/physrevd.79.124032" @default.
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