他学部・他研究科等兼任情報

理工学術院 先進理工学部
2022/11/29 更新
理工学術院 先進理工学部
早稲田大学 高等研究所 准教授 准教授
早稲田大学 高等研究所 講師 講師
早稲田大学 理工学術院総合研究所 次席研究員 研究院講師
京都大学 基礎物理学研究所 HPCI研究員
早稲田大学 理工学術院総合研究所 次席研究員 研究院助教
リスボン工科大学 GRIT 研究員
京都大学 基礎物理学研究所 極限構造研究部門 非常勤研究員
素粒子、原子核、宇宙線、宇宙物理にする理論 一般相対論
計算科学
宇宙物理学
A novel formulation for the evolution of relativistic rotating stars
Hirotada Okawa, Kotaro Fujisawa, Nobutoshi Yasutake, Misa Ogata, Yu Yamamoto, Shoichi Yamada
2022年04月
SingularityAvoiding MultiDimensional RootFinder
Hirotada Okawa, Kotaro Fujisawa, Yu Yamamoto, Nobutoshi Yasutake, Misa Ogata, Shoichi Yamada
2022年04月
Primordial black hole formation from massless scalar isocurvature
ChulMoon Yoo, Tomohiro Harada, Shin'ichi Hirano, Hirotada Okawa, Misao Sasaki
PHYSICAL REVIEW D 105 ( 10 ) 2021年12月
Wakana Iwakami, Akira Harada, Hiroki Nagakura, Ryuichiro Akaho, Hirotada Okawa, Shun Furusawa, Hideo Matsufuru, Kohsuke Sumiyoshi, Shoichi Yamada
Astrophysical Journal 933 ( 1 ) 2021年09月
Multidimensional Boltzmann Neutrino Transport Code in Full General Relativity for Corecollapse Simulations
Ryuichiro Akaho, Akira Harada, Hiroki Nagakura, Kohsuke Sumiyoshi, Wakana Iwakami, Hirotada Okawa, Shun Furusawa, Hideo Matsufuru, Shoichi Yamada
Astrophysical Journal 909 ( 2 ) 2021年03月
Simulations of the early postbounce phase of corecollapse supernovae in threedimensional space with full boltzmann neutrino transport
Wakana Iwakami, Hirotada Okawa, Hiroki Nagakura, Akira Harada, Shun Furusawa, Kosuke Sumiyoshi, Hideo Matsufuru, Shoichi Yamada
Astrophysical Journal 903 ( 2 ) 2020年11月
The Boltzmannradiationhydrodynamics Simulations of Corecollapse Supernovae with Different Equations of State: The Role of Nuclear Composition and the Behavior of Neutrinos
Akira Harada, Hiroki Nagakura, Wakana Iwakami, Hirotada Okawa, Shun Furusawa, Kohsuke Sumiyoshi, Hideo Matsufuru, Shoichi Yamada
Astrophysical Journal 902 ( 2 ) 2020年10月
Fast collective neutrino oscillations inside the neutrino sphere in corecollapse supernovae
M. Delfan Azari, S. Yamada, T. Morinaga, H. Nagakura, S.Furusawa, A. Harada, H. Okawa, W. Iwakami, K. Sumiyoshi
Physical Review D 101 ( 2 ) 2020年01月
Cumulative shift of periastron time of binary pulsar with Kozai–Lidov oscillation
Suzuki H, Gupta P, Okawa H, Maeda K.I
Monthly Notices of the Royal Astronomical Society: Letters 486 ( 1 ) L52  L57 2019年06月 [査読有り]
Linear analysis of fastpairwise collective neutrino oscillations in corecollapse supernovae based on the results of Boltzmann simulations
Milad Delfan Azari, Shoichi Yamada, Taiki Morinaga, Wakana Iwakami, Hirotada Okawa, Hiroki Nagakura, Kohsuke Sumiyoshi
Physical Review D 99 ( 10 ) 2019年05月 [査読有り]
Gravitational collapse of a massless scalar field in a periodic box
Chul Moon Yoo, Taishi Ikeda, Hirotada Okawa
Classical and Quantum Gravity 36 ( 7 ) 2019年03月 [査読有り]
Akira Harada, Hiroki Nagakura, Wakana Iwakami, Hirotada Okawa, Shun Furusawa, Hideo Matsufuru, Kohsuke Sumiyoshi, Shoichi Yamada
Astrophysical Journal 872 ( 2 ) 2019年 [査読有り]
Effects of Rotation and Magnetic Field on the Revival of a Stalled Shock in Supernova Explosions
Kotaro Fujisawa, Hirotada Okawa, Yu Yamamoto, Shoichi Yamada
Astrophysical Journal 872 ( 2 ) 2019年 [査読有り]
Akira Harada, Hiroki Nagakura, Wakana Iwakami, Hirotada Okawa, Shun Furusawa, Hideo Matsufuru, Kohsuke Sumiyoshi, Shoichi Yamada
2018年10月
Maximal efficiency of the collisional Penrose process with spinning particles
Kei Ichi Maeda, Kazumasa Okabayashi, Hirotada Okawa
Physical Review D 98 ( 6 ) 2018年09月 [査読有り]
Effects of rotation and magnetic field on the revival of a stalled shock in supernova explosions
Kotaro Fujisawa, Hirotada Okawa, Yu Yamamoto, Shoichi Yamada
2018年09月
The W4 method: a new multidimensional rootfinding scheme for nonlinear systems of equations
Hirotada Okawa, Kotaro Fujisawa, Yu Yamamoto, Ryosuke Hirai, Nobutoshi Yasutake, Hiroki Nagakura, Shoichi Yamada
2018年09月
Hiroki Nagakura, Wakana Iwakami, Shun Furusawa, Hirotada Okawa, Akira Harada, Kohsuke Sumiyoshi, Shoichi Yamada, Hideo Matsufuru, Akira Imakura
Astrophysical Journal 854 ( 2 ) 2018年02月 [査読有り]
Katsuki Aoki, Kei Ichi Maeda, Yosuke Misonoh, Hirotada Okawa
Physical Review D 97 ( 4 ) 2018年02月 [査読有り]
Hydrostatic Equilibria of Rotating Stars with Realistic Equation of State
Nobutoshi Yasutake, Kotaro Fujisawa, Hirotada Okawa, Shoichi Yamada
JPS Conf.Proc. 20 17pp 2018年 [査読有り]
Nonlinear collisional Penrose process: How much energy can a black hole release?
Ken Ichi Nakao, Hirotada Okawa, Kei Ichi Maeda
Progress of Theoretical and Experimental Physics 2018 ( 1 ) 2018年01月 [査読有り]
3D simulation of spindle gravitational collapse of a collisionless particle system
Chul Moon Yoo, Tomohiro Harada, Hirotada Okawa
Classical and Quantum Gravity 34 ( 10 ) 2017年04月 [査読有り]
Hyperbolic selfgravity solver for large scale hydrodynamical simulations
Ryosuke Hirai, Hiroki Nagakura, Hirotada Okawa, Kotaro Fujisawa
Physical Review D 93 ( 8 ) 2016年04月 [査読有り]
Interaction between bosonic dark matter and stars
Richard Brito, Vitor Cardoso, Caio F.B. Macedo, Hirotada Okawa, Carlos Palenzuela
Physical Review D 93 ( 4 ) 2016年02月 [査読有り]
Testing general relativity with present and future astrophysical observations
Emanuele Berti, Enrico Barausse, Vitor Cardoso, Leonardo Gualtieri, Paolo Pani, Ulrich Sperhake, Leo C. Stein, Norbert Wex, Kent Yagi, Tessa Baker, C. P. Burgess, Flávio S. Coelho, Daniela Doneva, Antonio De Felice, Pedro G. Ferreira, Paulo C.C. Freire, James Healy, Carlos Herdeiro, Michael Horbatsch, Burkhard Kleihaus, Antoine Klein, Kostas Kokkotas, Jutta Kunz, Pablo Laguna, Ryan N. Lang, Tjonnie G.F. Li, Tyson Littenberg, Andrew Matas, Saeed Mirshekari, Hirotada Okawa, Eugen Radu, Richard O'Shaughnessy, Bangalore S. Sathyaprakash, Chris Van Den Broeck, Hans A. Winther, Helvi Witek, Mir Emad Aghili, Justin Alsing, Brett Bolen, Luca Bombelli, Sarah Caudill, Liang Chen, Juan Carlos Degollado, Ryuichi Fujita, Caixia Gao, Davide Gerosa, Saeed Kamali, Hector O. Silva, João G. Rosa, Laleh Sadeghian, Marco Sampaio, Hajime Sotani, Miguel Zilhao
Classical and Quantum Gravity 32 ( 24 ) 2015年12月
Nonlinear evolutions of bosonic clouds around black holes
Hirotada Okawa
Classical and Quantum Gravity 32 ( 21 ) 2015年10月 [査読有り]
Accretion of Dark Matter by Stars
Richard Brito, Vitor Cardoso, Hirotada Okawa
Physical Review Letters 115 ( 11 ) 2015年09月 [査読有り]
Dynamical mass ejection from black holeneutron star binaries
Koutarou Kyutoku, Kunihito Ioka, Hirotada Okawa, Masaru Shibata, Keisuke Taniguchi
Physical Review D  Particles, Fields, Gravitation and Cosmology 92 ( 4 ) 2015年08月 [査読有り]
Evidence for event horizons: Longlived modes in ultracompact objects
Caio F.B. MacEdo, Luís C.B. Crispino, Vitor Cardoso, Hirotada Okawa, Paolo Pani
International Journal of Modern Physics D 24 ( 9 ) 2015年08月 [査読有り]
Kyohei Kawaguchi, Koutarou Kyutoku, Hiroyuki Nakano, Hirotada Okawa, Masaru Shibata, Keisuke Taniguchi
Physical Review D  Particles, Fields, Gravitation and Cosmology 92 ( 2 ) 2015年07月 [査読有り]
Kenta Hotokezaka, Koutarou Kyutoku, Hirotada Okawa, Masaru Shibata
Physical Review D  Particles, Fields, Gravitation and Cosmology 91 ( 6 ) 2015年03月 [査読有り]
Black holes and fundamental fields: Hair, kicks, and a gravitational Magnus effect
Hirotada Okawa, Vitor Cardoso
Physical Review D  Particles, Fields, Gravitation and Cosmology 90 ( 10 ) 2014年11月 [査読有り]
Study of the nonlinear instability of confined geometries
Hirotada Okawa, Vitor Cardoso, Paolo Pani
Physical Review D  Particles, Fields, Gravitation and Cosmology 90 ( 10 ) 2014年11月 [査読有り]
Higher dimensional numerical relativity: Code comparison
Helvi Witek, Hirotada Okawa, Vitor Cardoso, Leonardo Gualtieri, Carlos Herdeiro, Masaru Shibata, Ulrich Sperhake, Miguel Zilhão
Physical Review D  Particles, Fields, Gravitation and Cosmology 90 ( 8 ) 2014年10月 [査読有り]
Vitor Cardoso, Luís C.B. Crispino, Caio F.B. Macedo, Hirotada Okawa, Paolo Pani
Physical Review D  Particles, Fields, Gravitation and Cosmology 90 ( 4 ) 2014年08月 [査読有り]
Black hole universe with a cosmological constant
Chul Moon Yoo, Hirotada Okawa
Physical Review D  Particles, Fields, Gravitation and Cosmology 89 ( 12 ) 2014年06月 [査読有り]
Hirotada Okawa, Helvi Witek, Vitor Cardoso
Physical Review D  Particles, Fields, Gravitation and Cosmology 89 ( 10 ) 2014年05月 [査読有り]
Coalescence of binary neutron stars in a scalartensor theory of gravity
Masaru Shibata, Keisuke Taniguchi, Hirotada Okawa, Alessandra Buonanno
Physical Review D  Particles, Fields, Gravitation and Cosmology 89 ( 8 ) 2014年04月 [査読有り]
Hirotada Okawa, Vitor Cardoso, Paolo Pani
Physical Review D  Particles, Fields, Gravitation and Cosmology 89 ( 4 ) 2014年02月 [査読有り]
An alternative numerical method for the stationary pulsar magnetosphere
Yohsuke Takamori, Hirotada Okawa, Makoto Takamoto, Yudai Suwa
Publications of the Astronomical Society of Japan 66 ( 1 ) 2014年 [査読有り]
Blackhole universe: Time evolution
Chul Moon Yoo, Hirotada Okawa, Ken Ichi Nakao
Physical Review Letters 111 ( 16 ) 2013年10月 [査読有り]
Hirotada Okawa
International Journal of Modern Physics A 28 ( 2223 ) 2013年09月 [査読有り]
Mass ejection from the merger of binary neutron stars
Kenta Hotokezaka, Kenta Kiuchi, Koutarou Kyutoku, Hirotada Okawa, Yu Ichiro Sekiguchi, Masaru Shibata, Keisuke Taniguchi
Physical Review D  Particles, Fields, Gravitation and Cosmology 87 ( 2 ) 2013年01月 [査読有り]
NR/HEP: Roadmap for the future
Vitor Cardoso, Leonardo Gualtieri, Carlos Herdeiro, Ulrich Sperhake, Paul M. Chesler, Luis Lehner, Seong Chan Park, Harvey S. Reall, Carlos F. Sopuerta, Daniela Alic, Oscar J.C. Dias, Roberto Emparan, Valeria Ferrari, Steven B. Giddings, Mahdi Godazgar, Ruth Gregory, Veronika E. Hubeny, Akihiro Ishibashi, Greg Landsberg, Carlos O. Lousto, David Mateos, Vicki Moeller, Hirotada Okawa, Paolo Pani, M. Andy Parker, Frans Pretorius, Masaru Shibata, Hajime Sotani, Toby Wiseman, Helvi Witek, Nicolas Yunes, Miguel Zilhão
Classical and Quantum Gravity 29 ( 24 ) 2012年12月 [査読有り]
Koutarou Kyutoku, Hirotada Okawa, Masaru Shibata, Keisuke Taniguchi
Physical Review D  Particles, Fields, Gravitation and Cosmology 84 ( 6 ) 2011年09月 [査読有り]
Binary neutron star mergers: Dependence on the nuclear equation of state
Kenta Hotokezaka, Koutarou Kyutoku, Hirotada Okawa, Masaru Shibata, Kenta Kiuchi
Physical Review D  Particles, Fields, Gravitation and Cosmology 83 ( 12 ) 2011年06月 [査読有り]
Is superPlanckian physics visible? Scattering of black holes in 5 dimensions
Hirotada Okawa, Ken Ichi Nakao, Masaru Shibata
Physical Review D  Particles, Fields, Gravitation and Cosmology 83 ( 12 ) 2011年06月 [査読有り]
Highvelocity bh collision in 5 dimensions
Hirotada Okawa, Masaru Shibata
Proceedings of the 20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 425  427 2010年12月
Highvelocity bh collision in 5 dimensions
Hirotada Okawa, Masaru Shibata
Proceedings of the 20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 425  427 2010年 [査読有り]
Gravitational waves from spinning black holeneutron star binaries
Koutarou Kyutoku, Masaru Shibata, Hirotada Okawa, Keisuke Taniguchi
Proceedings of the 20th Workshop on General Relativity and Gravitation in Japan, JGRG 2010 254  257 2010年 [査読有り]
Highvelocity collision of two black holes
Masaru Shibata, Hirotada Okawa, Tetsuro Yamamoto
Physical Review D  Particles, Fields, Gravitation and Cosmology 78 ( 10 ) 2008年11月 [査読有り]
ラグランジュ描像における相対論的回転星の進化
日本学術振興会 科学研究費助成事業 基盤研究(C)
研究期間:
大川 博督
原始ブラックホールの質量，角運動量分布に関する理論的研究
日本学術振興会 科学研究費助成事業 基盤研究(B)
研究期間:
柳 哲文, 大川 博督, 原田 知広, 佐々木 節
日本学術振興会 科学研究費助成事業 挑戦的研究(萌芽)
研究期間:
山田 章一, 安武 伸俊, 藤澤 幸太郎, 大川 博督
Eccentric KozaiLidov Mechanism and Orbital Flip
Hirotada Okawa
Waseda Astrophysics Group Colloquium
発表年月： 2021年11月
ラグランジュ描像における相対論的回転星の進化計算
大川博督, 藤澤幸太郎, 安武伸俊, 小形美沙, 山本佑, 山田章一
日本物理学会２０２１年秋季大会
発表年月： 2021年09月
新しい非線形連立方程式の解法（W4法）を用いた非線形楕円型方程式の解析手法の確立
大川博督
WIAS Research Debriefing Session
発表年月： 2021年07月
Lagrange Construction of Relativistic Rotating Stars
Hirotada Okawa
Waseda Spring Interim Report
発表年月： 2021年04月
Citation Countは当該年に発表した論文の被引用数