Three-dimensional boltzmann hydro code for core collapse in massive stars. I. Special relativistic treatments

Hiroki Nagakura*, Kohsuke Sumiyoshi, Shoichi Yamada


研究成果: Article査読

42 被引用数 (Scopus)


We propose a novel numerical method for solving multi-dimensional, special relativistic Boltzmann equations for neutrinos coupled with hydrodynamics equations. This method 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 the advection and collision terms in the Boltzmann equations has been a challenge, 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 15 Mφ 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 into our method.

ジャーナルAstrophysical Journal, Supplement Series
出版ステータスPublished - 2014

ASJC Scopus subject areas

  • 天文学と天体物理学
  • 宇宙惑星科学


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