Simple fits for the neutrino luminosities from protoneutron star cooling
arxiv(2024)
摘要
We propose a simple fit function, L_ν_i(t) = C t^-α
e^-(t/τ)^n, to parametrize the luminosities of neutrinos and
antineutrinos of all flavors during the protoneutron star (PNS) cooling phase
at post-bounce times t ≳ 1 s. This fit is based on results from a set
of neutrino-hydrodynamics simulations of core-collapse supernovae in spherical
symmetry. The simulations were performed with an energy-dependent transport for
six neutrino species and took into account the effects of convection and muons
in the dense and hot PNS interior. We provide values of the fit parameters C,
α, τ, and n for different neutron star masses and equations of
state as well as correlations between these fit parameters. Our functional
description is useful for analytic supernova modeling, for characterizing the
neutrino light curves in large underground neutrino detectors, and as a tool to
extract information from measured signals on the mass and equation of state of
the PNS and on secondary signal components on top of the PNS's neutrino
emission.
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