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- W4300919898 abstract "The determination of neutron star masses is reviewed in light of a new measurement of 1.97 M$_odot$ for PSR J1614-2230 and an estimate of 2.4 M$_odot$ for the black widow pulsar. Using a simple analytic model related to the so-called maximally compact equation of state, model-independent upper limits to thermodynamic properties in neutron stars, such as energy density, pressure, baryon number density and chemical potential, are established which depend upon the neutron star maximum mass. Using the largest well-measured neutron star mass, 1.97 M$_odot$, it is possible to show that the energy density can never exceed about 2 GeV, the pressure about 1.3 GeV, and the baryon chemical potential about 2.1 GeV. Further, if quark matter comprises a significant component of neutron star cores, these limits are reduced to 1.3 GeV, 0.9 GeV, and 1.5 GeV, respectively. We also find that the maximum binding energy of any neutron star is about 25% of the rest mass. Neutron matter properties and astrophysical constraints additionally imply an upper limit to the neutron star maximum mass of about 2.4 M$_odot$. A measured mass of 2.4 M$odot$ would be incompatible with hybrid star models containing {it significant} proportions of exotica in the form of hyperons, Bose condensates or quark matter." @default.
- W4300919898 created "2022-10-04" @default.
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- W4300919898 date "2010-12-14" @default.
- W4300919898 modified "2023-10-15" @default.
- W4300919898 title "What a Two Solar Mass Neutron Star Really Means" @default.
- W4300919898 doi "https://doi.org/10.48550/arxiv.1012.3208" @default.
- W4300919898 hasPublicationYear "2010" @default.
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