J-GLOBAL         Last updated: Apr 14, 2019 at 03:12
National Astronomical Observatory of Japan
Research funding number

Research Areas


Academic & Professional Experience

Apr 2019
Assistant Professor, Division of Science, National Astronomical Observatory of Japan
Feb 2016
Mar 2019
Assistant Professor, Division of Theoretical Astronomy, National Astronomical Observatory of Japan

Awards & Honors

Mar 2016
theoretical research on the mechanism of core-collapse supernova explosions using massively-parallelized three-dimensional simulations., ASJ Young Astronomer Award 2016, The Astronomical Society of Japan
Jun 2018
Award for Young Researcher, National Institutes of Natural Sciences

Published Papers

   Nov 2018   [Refereed]
Recent core-collapse supernova (CCSN) simulations have predicted several distinct features in gravitational-wave (GW) spectrograms, including a ramp-up signature due to the g-mode oscillation of the protoneutron star (PNS) and an excess in the low...
   Apr 2018   [Refereed]
It has been suggested that whether a star explodes or not, and what kind of explosion properties it shows, is strongly dependent on the progenitor's core structure. We present the results from 101 axisymmetric core-collapse supernova simulations p...
Takami Kuroda, Kei Kotake, Tomoya Takiwaki, Friedrich-Karl Thielemann
Monthly Notices of the Royal Astronomical Society: Letters      Apr 2018   [Refereed]
   Oct 2018   [Refereed]
We present a comparison between several simulation codes designed to study the core-collapse supernova mechanism. We pay close attention to controlling the initial conditions and input physics in order to ensure a meaningful and informative compar...
Tomoya Takiwaki, Kei Kotake
Monthly Notices of the Royal Astronomical Society: Letters   475(1) L91   Mar 2018   [Refereed]
Kazuhiro Hayama, Takami Kuroda, Kei Kotake, Tomoya Takiwaki
Monthly Notices of the Royal Astronomical Society: Letters      Apr 2018   [Refereed]
   Oct 2018   [Refereed]
Macroscopic evolution of relativistic charged matter with chirality imbalance is described by the chiral magnetohydrodynamics (chiral MHD). One such astrophysical system is high-density lepton matter in core-collapse supernovae where the chirality...
Shunsaku Horiuchi, Kohsuke Sumiyoshi, Ko Nakamura, Tobias Fischer, Alexander Summa, Tomoya Takiwaki, Hans-Thomas Janka, Kei Kotake
Monthly Notices of the Royal Astronomical Society   475(1) 1363   Mar 2018   [Refereed]
{Katsuda} S, {Morii} M, {Janka} H.-T, {Wongwathanarat} A, {Nakamura} K, {Kotake} K, {Mori} K, {M{ü}ller} E, {Takiwaki} T, {Tanaka} M, {Tominaga} N, {Tsunemi} H.
\apj   856 18   Mar 2018   [Refereed]
{Kotake} K, {Takiwaki} T, {Fischer} T, {Nakamura} K, {Mart{\'{\i}}nez-Pinedo} G.
\apj   853 170   Feb 2018   [Refereed]
{Eichler} M, {Nakamura} K, {Takiwaki} T, {Kuroda} T, {Kotake} K, {Hempel} M, {Cabez{ó}n} R, {Liebend{ö}rfer} M, {Thielemann} F.-K.
Journal of Physics G Nuclear Physics   45(1) 014001   Jan 2018   [Refereed]
{Kuroda} T, {Kotake} K, {Hayama} K, {Takiwaki} T.
\apj   851 62   Dec 2017   [Refereed]
   Nov 2017   [Refereed]
We suggest the future detection of neutrinos from a Galactic core-collapse supernova can be used to infer the progenitor’s inner mass density structure. We present the results from 20 axisymmetric core-collapse supernova simulations performed with...
   Sep 2017   [Refereed]
The gravitational-wave (GW) asteroseismology is a powerful technique for extracting interior information of compact objects. In this work, we focus on spacetime modes, the so-called w modes, of GWs emitted from a proto-neutron star (PNS) in the po...
   Aug 2017   [Refereed]
We study the effects of collective neutrino oscillations on ν p process nucleosynthesis in proton-rich neutrino-driven winds by including both the multiangle 3 ×3 flavor mixing and the nucleosynthesis network calculation. The number flux of energe...
Nobuya Nishimura, Hidetomo Sawai, Tomoya Takiwaki, Shoichi Yamada, Friedrich-Karl Thielemann
The Astrophysical Journal Letters, 836:L21, 2017      Nov 2016
We investigated r-process nucleosynthesis in magneto-rotational supernovae,
based on a new explosion mechanism induced by the magneto-rotational
instability. A series of axisymmetric magneto-hydrodynamical simulations with
detailed microphysics in...
Hajime Sotani, Tomoya Takiwaki
Phys. Rev. D 94, 044043 (2016)      Aug 2016
We examine the time evolution of the frequencies of the gravitational wave
after the bounce within the framework of relativistic linear perturbation
theory using the results of one dimensional numerical simulations of
core-collapse supernovae. Pro...
Takami Kuroda, Kei Kotake, Tomoya Takiwaki
Astrophysical Journal Letters   829(1)    May 2016
We present results from fully relativistic three-dimensional core-collapse
supernova (CCSN) simulations of a non-rotating 15 Msun star using three
different nuclear equations of state (EoSs). From our simulations covering up
to ~350 ms after bounc...
Tomoya Takiwaki, Kei Kotake, Yudai Suwa
Monthly Notices of the Royal Astronomical Society: Letters   461(1) L112-L116   Feb 2016
We report results from a series of three-dimensional (3D) rotational
core-collapse simulations for Tex and 27 Tex stars employing
neutrino transport scheme by the isotropic diffusion source approximation. By
changing the initial strengt...

Conference Activities & Talks

Tomoya Takiwaki
素粒子・原子核・宇宙「京からポスト京に向けて」シンポジウム   28 Dec 2017   計算基礎科学連携拠点(JICFuS)、ポスト「京」重点課題9「宇宙の基本法則と進化の解明」
Tomoya Takiwaki
地下素核2017年領域研究会,   21 May 2017   新学術領域「地下素核」
Tomoya Takiwaki
新学術領域(地下素核)第3回超新星ニュートリノ研究会   3 Mar 2017   新学術領域「地下素核」
Tomoya Takiwaki
, The first annual symposium of the innovative area "Gravitational Wave Physics and Astronomy: Genesis   新学術領域「重力波創世記」
Tomoya Takiwaki
新学術領域地下素核C01,C02研究会   新学術領域「地下素核」