Constraints on maximum neutron star mass from proto-neutron star evolution

The current paradigm for neutron stars is that they are composed primarily of neutrons, with some protons and leptons. There are a number of variations to this paradigm, including the presence of hyperons, kaons, or deconfined quarks.

This preprint explores the impact of hyperons on the equation of state (EOS) of proto-neutron stars (PNSs). The authors find that the presence of hyperons softens the EOS, leading to a reduction in the maximum mass of PNSs. It is important to note that the presence of hyperons is still a matter of debate, and further research is needed to confirm their existence in neutron stars. Because of that I classified this preprint as Model Drift, since while the underlying paradigm remains the same, this paper is exploring adjustments within this model, which might or not be proven valid. Also it is important to remark that due to the novelty of the subject, it was difficult to classify between Model Drift and Model Crisis or Model Revolution.