Soft chiral EFT equations of state require a stiff polytrope followed by a softer, causally safe continuation to reach about 2.2 to 2.5 solar masses, and the new cooling curves are presented as proof of concept.
Huth, et al., Constraining neutron-star matter with microscopic and macroscopic collisions, Nature 606 (2022) 276
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General features of the stellar matter equation of state from microscopic theory, new maximum-mass constraints, and causality
Soft chiral EFT equations of state require a stiff polytrope followed by a softer, causally safe continuation to reach about 2.2 to 2.5 solar masses, and the new cooling curves are presented as proof of concept.