Gray Two-moment Neutrino Transport: Comprehensive Tests and Improvements for Supernova Simulations
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| Main Authors: | , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866909239604150272 |
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| author | Andresen, Haakon O'Connor, Evan P. Andersen, Oliver Eggenberger Couch, Sean M. |
| author_facet | Andresen, Haakon O'Connor, Evan P. Andersen, Oliver Eggenberger Couch, Sean M. |
| contents | In this work we extended an energy-integrated neutrino transport method to facilitate efficient, yet precise, modeling of compact astrophysical objects. We particularly focus on core-collapse supernovae. We implemented a gray neutrino-transport framework from the literature into FLASH and performed a detailed evaluation of its accuracy in core-collapse supernova simulations. Based on comparisons with results from simulations using energy-dependent neutrino transport, we incorporated several improvements to the original scheme. Our analysis shows that our gray neutrino transport method successfully reproduces key aspects from more complex energy-dependent transport across a variety of progenitors and equations of state. We find both qualitative and reasonable quantitative agreement with multi-group M1 transport simulations. However, the gray scheme tends to slightly favor shock revival. In terms of gravitational wave and neutrino signals, there is a good alignment with the energy-dependent transport, although we find 15-30% discrepancies in the average energy and luminosity of heavy-lepton neutrinos. Simulations using the gray transport are around four times faster than those using energy-dependent transport. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2402_18303 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Gray Two-moment Neutrino Transport: Comprehensive Tests and Improvements for Supernova Simulations Andresen, Haakon O'Connor, Evan P. Andersen, Oliver Eggenberger Couch, Sean M. High Energy Astrophysical Phenomena In this work we extended an energy-integrated neutrino transport method to facilitate efficient, yet precise, modeling of compact astrophysical objects. We particularly focus on core-collapse supernovae. We implemented a gray neutrino-transport framework from the literature into FLASH and performed a detailed evaluation of its accuracy in core-collapse supernova simulations. Based on comparisons with results from simulations using energy-dependent neutrino transport, we incorporated several improvements to the original scheme. Our analysis shows that our gray neutrino transport method successfully reproduces key aspects from more complex energy-dependent transport across a variety of progenitors and equations of state. We find both qualitative and reasonable quantitative agreement with multi-group M1 transport simulations. However, the gray scheme tends to slightly favor shock revival. In terms of gravitational wave and neutrino signals, there is a good alignment with the energy-dependent transport, although we find 15-30% discrepancies in the average energy and luminosity of heavy-lepton neutrinos. Simulations using the gray transport are around four times faster than those using energy-dependent transport. |
| title | Gray Two-moment Neutrino Transport: Comprehensive Tests and Improvements for Supernova Simulations |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2402.18303 |