Journal
ASTROPHYSICAL JOURNAL SUPPLEMENT SERIES
Volume 214, Issue 2, Pages -Publisher
IOP PUBLISHING LTD
DOI: 10.1088/0067-0049/214/2/16
Keywords
hydrodynamics; neutrinos; supernovae: general
Categories
Funding
- Ministry of Education, Culture, Sports, Science, and Technology (MEXT) of Japan [22540296, 24103006, 24740165, 24244036]
- HPCI Strategic Program of the Japanese MEXT
- K computer at the RIKEN [hpci 130025, 140211]
- High Energy Accelerator Research Organization (KEK) under the support of its Large Scale Simulation Program [13/14-10]
- Grants-in-Aid for Scientific Research [24105008, 24103006, 22540296, 24740165] Funding Source: KAKEN
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We propose a novel numerical method for solving multi-dimensional, special relativistic Boltzmann equations for neutrinos coupled to hydrodynamics equations. It is meant to be applied to simulations of core-collapse supernovae. We handle special relativity in a non-conventional way, taking account of all orders of v/c. Consistent treatment of advection and collision terms in the Boltzmann equations is the source of difficulties, which we overcome by employing two different energy grids: Lagrangian remapped and laboratory fixed grids. We conduct a series of basic tests and perform a one-dimensional simulation of core-collapse, bounce and shock-stall for a 15M(circle dot) progenitor model with a minimum but essential set of microphysics. We demonstrate in the latter simulation that our new code is capable of handling all phases in core-collapse supernova. For comparison, a non-relativistic simulation is also conducted with the same code, and we show that they produce qualitatively wrong results in neutrino transfer. Finally, we discuss a possible incorporation of general relativistic effects in our method.
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