Light curve and neutrino spectrum emitted during the collapse of a nonrotating, supermassive star

TL;DR

This paper analytically models the neutrino emission and light curve during the collapse of a nonrotating supermassive star, providing insights into the neutrino spectrum and temporal emission profile.

Contribution

It presents an analytical solution for the neutrino pulse and light curve during the relativistic collapse of a uniform-density, nonrotating supermassive star.

Findings

Calculated the neutrino spectrum at various collapse stages

Derived the light curve of the collapsing star

Provided an analytical framework for neutrino emission during collapse

Abstract

The formation of a neutrino pulse emitted during the relativistic collapse of a spherical supermassive star is considered. The free collapse of a body with uniform density in the absence of rotation and with the free escape of the emitted neutrinos can be solved analytically by quadrature. The light curve of the collapsing star and the spectrum of the emitted neutrinos at various times are calculated.