Soft nuclear equation-of-state from heavy-ion data and implications for compact stars

Details Soft nuclear equation-of-state from heavy-ion data and implications for compact stars Soft nuclear equation-of-state from heavy-ion data and implications for compact stars

2011-11-25

arxiv.org/abs/1111.6058v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

5 pages, 4 figures

Scientific paper

Measurements of kaon production at subthreshold energies in heavy ion collisions imply a soft nuclear equation-of-state for densities of 2-3 times nuclear saturation density. We apply these results to study the implications on compact star properties in view of the recent measurement of the 2M pulsar PSR J1614-2230. We explore the role of the nuclear matter compressibility and the symmetry energy of nuclear matter for the maximum masses of neutron stars and radii of low mass neutron stars, and especially demonstrate that the heavy-ion data and causality imply a firm upper limit on the maximum mass of compact stars of three solar masses.

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