Constraints on neutron star radii based on chiral effective field theory interactions |
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Authors: | Hebeler K Lattimer J M Pethick C J Schwenk A |
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Institution: | TRIUMF, 4004 Wesbrook Mall, Vancouver, British Columbia, V6T 2A3, Canada. |
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Abstract: | We show that microscopic calculations based on chiral effective field theory interactions constrain the properties of neutron-rich matter below nuclear densities to a much higher degree than is reflected in commonly used equations of state. Combined with observed neutron star masses, our results lead to a radius R=9.7-13.9 km for a 1.4M⊙ star, where the theoretical range is due, in about equal amounts, to uncertainties in many-body forces and to the extrapolation to high densities. |
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