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Updated nuclear masses lead to revised neutron star compactness in GS 1826-24

Paper Authors:

Wen-Jie Xie,

Bao-An Li,

Nai-Bo Zhang

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Key Details

New nuclear data leads to revised fit for neutron star in GS 1826-24

Compactness limit reduced compared to previous knowledge

Requires softening of symmetric nuclear matter equation of state

Stiffening of nuclear symmetry energy at high densities

GW190814 secondary would need near maximal spin as pulsar

AI generated summary

Updated nuclear masses lead to revised neutron star compactness in GS 1826-24

New high-precision measurements of short-lived nuclei involved in the rapid proton capture process in neutron stars have enabled a revised fit of the X-ray burst curve of neutron star GS 1826-24. This points to a less compact neutron star with reduced maximum compactness. We investigate the impact on the equation of state of dense neutron-rich matter and spin of GW190814's secondary component as a possible massive pulsar.

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