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Free keywords:
Astrophysics, High Energy Astrophysical Phenomena, astro-ph.HE,General Relativity and Quantum Cosmology, gr-qc,Nuclear Theory, nucl-th
Abstract:
We revisit the constraint on the maximum mass of cold spherical neutron stars
coming from the observational results of GW170817. We develop a new framework
for the analysis, which is more strict than previous ones, by employing both
energy and angular momentum conservation laws as well as solid results of
numerical-relativity simulations and of neutron stars in equilibrium. The new
analysis shows that the maximum mass of cold spherical neutron stars can be
only weakly constrained as $M_{\rm max} \alt 2.3M_\odot$. Our present result
gives the following caution for interpreting the future observational results:
Oversimplified analyses and/or inappropriate assumptions lead to an inaccurate
constraint on the maximum mass of neutron stars.
