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

Hiroki Nagakura, Kohsuke Sumiyoshi, Shoichi Yamada

    Research output: Contribution to journalArticle

    14 Citations (Scopus)

    Abstract

    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.

    Original languageEnglish
    Article number214
    JournalAstrophysical Journal, Supplement Series
    Volume214
    Issue number2
    DOIs
    Publication statusPublished - 2014

    Fingerprint

    massive stars
    simulation
    supernovae
    neutrinos
    grids
    hydrodynamic equations
    relativistic effects
    advection
    numerical method
    relativity
    collision
    hydrodynamics
    shock
    collisions
    code
    energy
    method

    Keywords

    • hydrodynamics
    • neutrinos
    • supernovae: general

    ASJC Scopus subject areas

    • Space and Planetary Science
    • Astronomy and Astrophysics

    Cite this

    Three-dimensional boltzmann hydro code for core collapse in massive stars. I. Special relativistic treatments. / Nagakura, Hiroki; Sumiyoshi, Kohsuke; Yamada, Shoichi.

    In: Astrophysical Journal, Supplement Series, Vol. 214, No. 2, 214, 2014.

    Research output: Contribution to journalArticle

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