The Effect of the Fast-Flavor Instability on Core-Collapse Supernova Models: II. Quasi-Equipartition and the Impact of Various Angular Reconstruction Methods Article Swipe

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Adam Burrows ·

YOU? · · 2025 · Open Access · · DOI: https://doi.org/10.48550/arxiv.2511.20767

In this work, we explore in a consistent fashion the effects of fast flavor conversion (FFC) in 1D and 2D core-collapse supernova (CCSN) simulations. In addition, we investigate the impact of various angular reconstruction methods and compare the ``3-species'' and ``4-species'' neutrino transport schemes. We find that the FFC effects are insensitive to the different methods tested and that the FFC alters supernova hydrodynamics is only minor ways. We also present a ``quasi-equipartition'' approximation which can be used to estimate the FFC-altered neutrino properties by post-processing the neutrino signals extracted from no-oscillation CCSN simulations. The relative errors in neutrino number and energy luminosities of this phenomenological method are less than 2\% for 1D models, and less than 10\% for 2D models. This method provides a simple way to include the effects of FFC on neutrino signals without implementing a complex and expensive FFC scheme or redoing simulations.

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Type: preprint
Landing Page: http://arxiv.org/abs/2511.20767
PDF: https://arxiv.org/pdf/2511.20767
OA Status: green
OpenAlex ID: https://openalex.org/W4416777443

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DOI: https://doi.org/10.48550/arxiv.2511.20767

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Title: The Effect of the Fast-Flavor Instability on Core-Collapse Supernova Models: II. Quasi-Equipartition and the Impact of Various Angular Reconstruction Methods

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Type: preprint

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Publication year: 2025

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Publication date: 2025-11-25

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Authors: Adam Burrows

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Landing page: https://arxiv.org/abs/2511.20767

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PDF URL: https://arxiv.org/pdf/2511.20767

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