One possible mechanism for massive neutron star supported by soft EOS
De-Hua Wen, Jing Yan, Xue-Mei Liu
TL;DR
This paper proposes that a variation in the gravitational constant G under strong fields could enable soft EOSs to support massive neutron stars, reconciling observational data with nuclear theory.
Contribution
It introduces a novel mechanism where a varying gravitational constant allows soft EOSs to support massive neutron stars, addressing a key contradiction in astrophysics.
Findings
A varying G can support massive neutron stars with soft EOSs.
Soft EOSs are compatible with observed neutron star masses under this mechanism.
The mechanism offers a new perspective on neutron star physics and gravity theories.
Abstract
The recently discovery of a massive neutron star (PSR J1614-2230 of ) rules out the soft equation of states (EOSs) such as those included hyperons or kaon condensates at high densities, while the nuclear theory or the terrestrial laboratory data prefer a soft EOS. Here we propose one possible mechanism to allow that the observed massive neutron star can be supported by a soft EOS, that is, if the the gravitational constant varies at super strong field, a soft EOS can support the massive neutron stars.
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