Elastic scattering in general relativistic ray tracing for neutrinos
| Autor: | M. Brett Deaton, Yonglin Zhu, Jerred Jesse, Francois Foucart, Andy Bohn, Evan O'Connor, Gail C. McLaughlin, Matthew D. Duez |
|---|---|
| Rok vydání: | 2018 |
| Předmět: |
High Energy Astrophysical Phenomena (astro-ph.HE)
Elastic scattering Physics 010308 nuclear & particles physics General relativity Astrophysics::High Energy Astrophysical Phenomena Space time FOS: Physical sciences General Relativity and Quantum Cosmology (gr-qc) 01 natural sciences General Relativity and Quantum Cosmology Computational physics Ray tracing (physics) Neutron star 0103 physical sciences High Energy Physics::Experiment Covariant transformation Neutrino Astrophysics - High Energy Astrophysical Phenomena Nucleon 010303 astronomy & astrophysics |
| Zdroj: | Physical Review D. 98 |
| ISSN: | 2470-0029 2470-0010 |
| Popis: | We present a covariant ray tracing algorithm for computing high-resolution neutrino distributions in general relativistic numerical spacetimes with hydrodynamical sources. Our formulation treats the very important effect of elastic scattering of neutrinos off of nuclei and nucleons (changing the neutrino's direction but not energy) by incorporating estimates of the background neutrino fields. Background fields provide information about the spectra and intensities of the neutrinos scattered into each ray. These background fields may be taken from a low-order moment simulation or be ignored, in which case the method reduces to a standard state-of-the-art ray tracing formulation. The method handles radiation in regimes spanning optically thick to optically thin. We test the new code, highlight its strengths and weaknesses, and apply it to a simulation of a neutron star merger to compute neutrino fluxes and spectra, and to demonstrate a neutrino flavor oscillation calculation. In that environment, we find qualitatively different fluxes, spectra, and oscillation behaviors when elastic scattering is included. Comment: 25 pages, submitted to Physical Review D |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|