General-relativistic Radiation Transport Scheme in Gmunu. I. Implementation of Two-moment-based Multifrequency Radiative Transfer and Code Tests
We present the implementation of a two-moment-based general-relativistic multigroup radiation transport module in the G eneral-relativistic mu ltigrid nu merical ( Gmunu ) code. On top of solving the general-relativistic magnetohydrodynamics and the Einstein equations with conformally flat approxima...
| 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 Supplement Series |
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| Online Access: | https://doi.org/10.3847/1538-4365/acd931 |
| _version_ | 1797695425733459968 |
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| author | Patrick Chi-Kit Cheong Harry Ho-Yin Ng Alan Tsz-Lok Lam Tjonnie Guang Feng Li |
| author_facet | Patrick Chi-Kit Cheong Harry Ho-Yin Ng Alan Tsz-Lok Lam Tjonnie Guang Feng Li |
| author_sort | Patrick Chi-Kit Cheong |
| collection | DOAJ |
| description | We present the implementation of a two-moment-based general-relativistic multigroup radiation transport module in the G eneral-relativistic mu ltigrid nu merical ( Gmunu ) code. On top of solving the general-relativistic magnetohydrodynamics and the Einstein equations with conformally flat approximations, the code solves the evolution equations of the zeroth- and first-order moments of the radiations in the Eulerian-frame. An analytic closure relation is used to obtain the higher order moments and close the system. The finite-volume discretization has been adopted for the radiation moments. The advection in spatial space and frequency-space are handled explicitly. In addition, the radiation–matter interaction terms, which are very stiff in the optically thick region, are solved implicitly. The implicit–explicit Runge–Kutta schemes are adopted for time integration. We test the implementation with a number of numerical benchmarks from frequency-integrated to frequency-dependent cases. Furthermore, we also illustrate the astrophysical applications in hot neutron star and core-collapse supernovae modelings, and compare with other neutrino transport codes. |
| first_indexed | 2024-03-12T03:12:15Z |
| format | Article |
| id | doaj.art-6f13f58d943a4b75944c9951d2493f2d |
| institution | Directory Open Access Journal |
| issn | 0067-0049 |
| language | English |
| last_indexed | 2024-03-12T03:12:15Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Supplement Series |
| spelling | doaj.art-6f13f58d943a4b75944c9951d2493f2d2023-09-03T14:22:47ZengIOP PublishingThe Astrophysical Journal Supplement Series0067-00492023-01-0126723810.3847/1538-4365/acd931General-relativistic Radiation Transport Scheme in Gmunu. I. Implementation of Two-moment-based Multifrequency Radiative Transfer and Code TestsPatrick Chi-Kit Cheong0https://orcid.org/0000-0003-1449-3363Harry Ho-Yin Ng1https://orcid.org/0000-0003-3453-7394Alan Tsz-Lok Lam2https://orcid.org/0000-0002-1307-1401Tjonnie Guang Feng Li3https://orcid.org/0000-0003-4297-7365Department of Physics & Astronomy, University of New Hampshire , 9 Library Way, Durham NH 03824, USA; Department of Physics, University of California , Berkeley, Berkeley, CA 94720, USA ; patrick.cheong@berkeley.eduInstitut für Theoretische Physik, Goethe Universität , Max-von-Laue-Str. 1, D-60438 Frankfurt am Main, GermanyMax Planck Institute for Gravitational Physics (Albert Einstein Institute) , Am Mühlenberg 1, Postdam-Golm D-14476, GermanyDepartment of Physics and Astronomy, KU Leuven, Celestijnenlaan 200D, B-3001 Leuven, Belgium; Department of Electrical Engineering (ESAT), KU Leuven , Kasteelpark Arenberg 10, B-3001 Leuven, Belgium; Department of Physics, The Chinese University of Hong Kong , Shatin, N.T., Hong KongWe present the implementation of a two-moment-based general-relativistic multigroup radiation transport module in the G eneral-relativistic mu ltigrid nu merical ( Gmunu ) code. On top of solving the general-relativistic magnetohydrodynamics and the Einstein equations with conformally flat approximations, the code solves the evolution equations of the zeroth- and first-order moments of the radiations in the Eulerian-frame. An analytic closure relation is used to obtain the higher order moments and close the system. The finite-volume discretization has been adopted for the radiation moments. The advection in spatial space and frequency-space are handled explicitly. In addition, the radiation–matter interaction terms, which are very stiff in the optically thick region, are solved implicitly. The implicit–explicit Runge–Kutta schemes are adopted for time integration. We test the implementation with a number of numerical benchmarks from frequency-integrated to frequency-dependent cases. Furthermore, we also illustrate the astrophysical applications in hot neutron star and core-collapse supernovae modelings, and compare with other neutrino transport codes.https://doi.org/10.3847/1538-4365/acd931Relativistic fluid dynamicsNeutron starsSupernova neutrinosHydrodynamical simulationsAstronomical simulationsMagnetohydrodynamical simulations |
| spellingShingle | Patrick Chi-Kit Cheong Harry Ho-Yin Ng Alan Tsz-Lok Lam Tjonnie Guang Feng Li General-relativistic Radiation Transport Scheme in Gmunu. I. Implementation of Two-moment-based Multifrequency Radiative Transfer and Code Tests The Astrophysical Journal Supplement Series Relativistic fluid dynamics Neutron stars Supernova neutrinos Hydrodynamical simulations Astronomical simulations Magnetohydrodynamical simulations |
| title | General-relativistic Radiation Transport Scheme in Gmunu. I. Implementation of Two-moment-based Multifrequency Radiative Transfer and Code Tests |
| title_full | General-relativistic Radiation Transport Scheme in Gmunu. I. Implementation of Two-moment-based Multifrequency Radiative Transfer and Code Tests |
| title_fullStr | General-relativistic Radiation Transport Scheme in Gmunu. I. Implementation of Two-moment-based Multifrequency Radiative Transfer and Code Tests |
| title_full_unstemmed | General-relativistic Radiation Transport Scheme in Gmunu. I. Implementation of Two-moment-based Multifrequency Radiative Transfer and Code Tests |
| title_short | General-relativistic Radiation Transport Scheme in Gmunu. I. Implementation of Two-moment-based Multifrequency Radiative Transfer and Code Tests |
| title_sort | general relativistic radiation transport scheme in gmunu i implementation of two moment based multifrequency radiative transfer and code tests |
| topic | Relativistic fluid dynamics Neutron stars Supernova neutrinos Hydrodynamical simulations Astronomical simulations Magnetohydrodynamical simulations |
| url | https://doi.org/10.3847/1538-4365/acd931 |
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