Fast explicit solutions for neutrino-electron scattering: Explicit asymptotic methods

Lackey–Stewart, Aaron; Chari, Raghav; Cole, Adam; Brey, Nick; Gregory, Kyle; Crowley, Ryan; Guidry, Mike; Endeve, Eirik

doi:10.1103/physrevd.109.103019

Title: Fast explicit solutions for neutrino-electron scattering: Explicit asymptotic methods

Journal Article · 13 May 2024 · Physical Review. D.

DOI: https://doi.org/10.1103/physrevd.109.103019 · OSTI ID:2447256

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^[1]; Cole, Adam ^[1]; Brey, Nick ^[1]; Gregory, Kyle ^[1]; Crowley, Ryan ^[1];

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Univ. of Tennessee, Knoxville, TN (United States)
Univ. of Tennessee, Knoxville, TN (United States); Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Here, we present results of explicit asymptotic approximations applied to neutrino-electron scattering in a representative model of neutrino population evolution under conditions characteristic of core-collapse supernova explosions or binary neutron star mergers. It is shown that this approach provides stable solutions of these stiff systems of equations, with accuracy and time stepping comparable to that for standard implicit treatments such as backward Euler, fixed point iteration, and Anderson-accelerated fixed point iteration. Because each time step can be computed more rapidly with the explicit asymptotic approximation than with implicit methods, this suggests that algebraically stabilized explicit integration methods could be used to compute neutrino evolution coupled to hydrodynamics more efficiently in stellar explosions and mergers than the methods currently in use.

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Research Organization:: Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States)

Sponsoring Organization:: USDOE

Grant/Contract Number:: AC05-00OR22725

OSTI ID:: 2447256

Journal Information:: Physical Review. D., Journal Name: Physical Review. D. Journal Issue: 10 Vol. 109; ISSN 2470-0010

Publisher:: American Physical Society (APS)Copyright Statement

Country of Publication:: United States

Language:: English

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79 ASTRONOMY AND ASTROPHYSICS
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extrasolar neutrino astronomy
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Title: Fast explicit solutions for neutrino-electron scattering: Explicit asymptotic methods

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