One possible mechanism for massive neutron star supported by soft EOS
Abstract
The recently discovery of a massive neutron star (PSR J1614-2230 of 1.970.04M) 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 G varies at super strong field, a soft EOS can support the massive neutron stars.
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