Effects of Different Closure Choices in Core-collapse Supernova Simulations
The two-moment method is widely used to approximate the full neutrino transport equation in core-collapse supernova (CCSN) simulations, and different closures lead to subtle differences in the simulation results. In this paper, we compare the effects of closure choices on various physical quantities...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/aca75c |
| _version_ | 1797702049396162560 |
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| author | Tianshu Wang Adam Burrows |
| author_facet | Tianshu Wang Adam Burrows |
| author_sort | Tianshu Wang |
| collection | DOAJ |
| description | The two-moment method is widely used to approximate the full neutrino transport equation in core-collapse supernova (CCSN) simulations, and different closures lead to subtle differences in the simulation results. In this paper, we compare the effects of closure choices on various physical quantities in 1D and 2D time-dependent CCSN simulations with our multigroup radiation hydrodynamics code F ornax . We find that choices of the third-order closure relations influence the time-dependent simulations only slightly. Choices of the second-order closure relation have larger consequences than choices of the third-order closure, but these are still small compared to the remaining variations due to ambiguities in some physical inputs such as the nuclear equation of state. We also find that deviations in Eddington factors are not monotonically related to deviations in physical quantities, which means that simply comparing the Eddington factors does not inform one concerning which closure is better. |
| first_indexed | 2024-03-12T04:44:36Z |
| format | Article |
| id | doaj.art-0369bb146dc34e72a644313a1f5b4bad |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T04:44:36Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-0369bb146dc34e72a644313a1f5b4bad2023-09-03T09:29:26ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0194327810.3847/1538-4357/aca75cEffects of Different Closure Choices in Core-collapse Supernova SimulationsTianshu Wang0https://orcid.org/0000-0002-0042-9873Adam Burrows1https://orcid.org/0000-0002-3099-5024Department of Astrophysical Sciences , Princeton, NJ 08544, USA ; tianshuw@princeton.eduDepartment of Astrophysical Sciences , Princeton, NJ 08544, USA ; tianshuw@princeton.eduThe two-moment method is widely used to approximate the full neutrino transport equation in core-collapse supernova (CCSN) simulations, and different closures lead to subtle differences in the simulation results. In this paper, we compare the effects of closure choices on various physical quantities in 1D and 2D time-dependent CCSN simulations with our multigroup radiation hydrodynamics code F ornax . We find that choices of the third-order closure relations influence the time-dependent simulations only slightly. Choices of the second-order closure relation have larger consequences than choices of the third-order closure, but these are still small compared to the remaining variations due to ambiguities in some physical inputs such as the nuclear equation of state. We also find that deviations in Eddington factors are not monotonically related to deviations in physical quantities, which means that simply comparing the Eddington factors does not inform one concerning which closure is better.https://doi.org/10.3847/1538-4357/aca75cCore-collapse supernovaeRadiative transferSupernova neutrinos |
| spellingShingle | Tianshu Wang Adam Burrows Effects of Different Closure Choices in Core-collapse Supernova Simulations The Astrophysical Journal Core-collapse supernovae Radiative transfer Supernova neutrinos |
| title | Effects of Different Closure Choices in Core-collapse Supernova Simulations |
| title_full | Effects of Different Closure Choices in Core-collapse Supernova Simulations |
| title_fullStr | Effects of Different Closure Choices in Core-collapse Supernova Simulations |
| title_full_unstemmed | Effects of Different Closure Choices in Core-collapse Supernova Simulations |
| title_short | Effects of Different Closure Choices in Core-collapse Supernova Simulations |
| title_sort | effects of different closure choices in core collapse supernova simulations |
| topic | Core-collapse supernovae Radiative transfer Supernova neutrinos |
| url | https://doi.org/10.3847/1538-4357/aca75c |
| work_keys_str_mv | AT tianshuwang effectsofdifferentclosurechoicesincorecollapsesupernovasimulations AT adamburrows effectsofdifferentclosurechoicesincorecollapsesupernovasimulations |