Joint NICER+IXPE pulse-profile modeling of SRGA J144459.2-604207 favors large neutron-star mass and radius with two independent hotspots but shows strong sensitivity to joint-analysis methodology.
The maximum mass and radius of neutron stars and the nuclear symmetry energy
2 Pith papers cite this work, alongside 448 external citations. Polarity classification is still indexing.
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abstract
We calculate the equation of state of neutron matter with realistic two- and three-nucleon interactions using quantum Monte Carlo techniques, and illustrate that the short-range three-neutron interaction determines the correlation between neutron matter energy at nuclear saturation density and higher densities relevant to neutron stars. Our model also makes an experimentally testable prediction for the correlation between the nuclear symmetry energy and its density dependence -- determined solely by the strength of the short-range terms in the three neutron force. The same force provides a significant constraint on the maximum mass and radius of neutron stars.
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Short-range correlated pairs account for roughly 20% of nucleons in any nucleus and nearly all high-momentum nucleons, originating from the nucleon-nucleon tensor force.
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Pulse profile modelling of the 2024 outburst of the accreting millisecond pulsar SRGA J144459.2-604207
Joint NICER+IXPE pulse-profile modeling of SRGA J144459.2-604207 favors large neutron-star mass and radius with two independent hotspots but shows strong sensitivity to joint-analysis methodology.
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Short-range correlations in nuclei
Short-range correlated pairs account for roughly 20% of nucleons in any nucleus and nearly all high-momentum nucleons, originating from the nucleon-nucleon tensor force.