Akira Harada

High Energy Astrophysics Group,
Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS), RIKEN
Special Postdoctoral Researcher

Extreme environment is realized in the space. My research field is the high energy astrophysics, where yet-to-be-understood physical phenomena that occurs in the extreme environment.
Especially, my current interest is the explosion mechanism of the core-collapse supernovae.
日本語はこちら

Curriculum Vitae

Position:

Apr 2021-present Special Postdoctoral Researcher,
Interdisciplinary Theoretical and Mathematical Sciences Program (iTHEMS), RIKEN
Apr 2019-Mar 2021 Postdoctoral Fellow,
Institute for Cosmic Ray Research, University of Tokyo
Apr 2017-Mar 2019 JSPS (Japan Society for the Promotion of Science) Research Fellowship for Young Scientists (DC2),
Physics Department, University of Tokyo
Host Researcher: Prof. Naoki Yoshida

Education:

Mar 2019 University of Tokyo: PhD, Physics
Thesis subject: "Numerical Investigations on Explosion Mechanisms of Core-collapse Supernovae"
Superviser: Prof. Naoki Yoshida
Mar 2015 University of Tokyo: M. Sc., Physics
Thesis subject: "Neutrino-heating mechanims of core-collapse supernovae explosions"
Superviser: Prof. Naoki Yoshida
Mar 2013 University of Tokyo: B. Sc., Physics

Research

Explosion Mechanism of Core-Collapse Supernovae

Massive stars end their life with explosions. They are called core-collapse supernovae. The explosion mechanism is still uncertain, and I'm studying about it.

Publications

First author

  1. Harada, A., Nishikawa, S., Yamada, S., “Deep Learning of the Eddington Tensor in the Core-collapse Supernova Simulation”, The Astrophysical Journal, IOP publishing, Volume 925, Issue 2, article id. 117 (12 pp), 2022
  2. Harada, A., Nagakura, H., “Prospects of fast flavor neutrino conversion in rotating core-collapse supernovae”, The Astrophysical Journal, IOP publishing, Volume 924, Issue 2, article id. 109 (6 pp), 2022
  3. Harada, A., Nagakura, H., Iwakami, W., Okawa, H., Furusawa, S., Sumiyoshi, K., Matsufuru, H., Yamada, S., “The Boltzmann-radiation-hydrodynamics Simulations of the Core-collapse Supernova with the Different Equations of State: the Role of Nuclear Composition and the Behavior of Neutrinos”, The Astrophysical Journal, IOP publishing, Volume 902, Issue 2, article id. 150 (25 pp), 2020
  4. Harada, A., Nagakura, H., Iwakami, W., Okawa, H., Furusawa, S., Matsufuru, H., Sumiyoshi, K., Yamada, S., “On the Neutrino Distributions in Phase Space for the Rotating Core-Collapse Supernova Simulated with a Boltzmann-Neutrino-Radiation-Hydrodynamics Code”, The Astrophysical Journal, IOP publishing, Volume 872, Issue 2, article id. 181 (19 pp), 2019
  5. Harada, A., Nagakura, H., Iwakami, W., Yamada, S., “A Parametric Study of the Acoustic Mechanism for Core-Collapse Supernovae”, The Astrophysical Journal, IOP publishing, Volume 839, Issue 1, article id. 28 (16 pp), 2017
  6. Harada, A., Kamada, A., “Structure formation in a mixed dark matter model with decaying sterile neutrino: the 3.5 keV X-ray line and the Galactic substructure”, Journal of Cosmology and Astroparticle Physics, IOP publishing, Volume 2016, Issue 1, article id. 31 (28 pp), 2016

Coauthor

  1. Akaho, R., Harada, A., Nagakura, H., Iwakami, W., Okawa, H., Furusawa, S., Matsufuru, H., Sumiyoshi, K., Yamada, S., “Protoneutron Star Convection Simulated with a New General Relativistic Boltzmann Neutrino Radiation-Hydrodynamics Code”, arXiv:2206.01673, 2022
  2. Suwa, Y., Harada, A., Harada, M., Koshio, Y., Mori, M., Nakanishi, F., Nakazato, K., Sumiyoshi, K., Wendell, R. A., “Observing Supernova Neutrino Light Curves with Super-Kamiokande. III. Extraction of Mass and Radius of Neutron Stars from Synthetic Data”, arXiv:2204.08363, 2022
  3. Iwakami, W., Harada, A., Nagakura, H., Akaho, R., Okawa, H., Furusawa, S., Matsufuru, H., Sumiyoshi, K., Yamada, S., “Principal-Axis Analysis of the Eddington Tensor for the Early Post-Bounce Phase of Rotational Core-Collapse Supernovae”, arXiv:2109.05846, 2021
  4. Nakazato, K., Nakanishi, F., Harada, M., Koshio, Y., Suwa, Y., Sumiyoshi, K., Harada, A., Mori, M., Wendell, R. A., “Observing Supernova Neutrino Light Curves with Super-Kamiokande: II. Impact of the Nuclear Equation of State”, The Astrophysical Journal, IOP publishing, Volume 925, Issue 1, article id. 98 (16 pp), 2022
  5. Arimoto, A. et al. (6th author), “Gravitational Wave Physics and Astronomy in the nascent era”, Progress of Theoretical and Experimental Physics, ptab042 (89 pp), 2021
  6. Mori, M., Suwa, Y., Nakazato, K., Sumiyoshi, K., Harada, M., Harada, A., Koshio, Y., Wendell, R. A., “Developing an end-to-end simulation framework of supernova neutrino detection”, Progress of Theoretical and Experimental Physics, Volume 2021, Issue 2, id.023E01 (21 pp), 2021
  7. Akaho, R., Harada, A., Nagakura, H., Sumiyoshi, K., Iwakami, W., Okawa, H., Furusawa, S., Matsufuru, H., Yamada, S., “Multidimensional Boltzmann Neutrino Transport Code in Full General Relativity for Core-collapse Simulations”, The Astrophysical Journal, 909, Issue 2, id.210 (17 pp), 2021
  8. Suwa, Y., Harada, A., Nakazato, K., Sumiyoshi, K., “Analytic solutions for neutrino-light curves of core-collapse supernovae”, Progress of Theoretical and Experimental Physics, Volume 2021, Issue 1, id.013E01 (12 pp), 2021
  9. Iwakami, W., Okawa, Nagakura, H., Harada, A., H., Furusawa, S., Sumiyoshi, K., Matsufuru, H., Yamada, S., “Simulations of the Early Post-Bounce Phase of Core-Collapse Supernovae in Three-Dimensional Space with Full Boltzmann Neutrino Transport”, The Astrophysical Journal, 903, Issue 2, id.82 (24 pp), 2020
  10. Delfan Azari, M., Yamada, S., Morinaga, T., Nagakura, H., Furusawa, S., Harada, A., Okawa, H., Iwakami, W., Sumiyoshi, K., “Fast collective neutrino oscillations inside the neutrino sphere in core-collapse supernovae”, Physical Review D, 101, Issue 2, article id.023018 (12 pp), 2019
  11. Nagakura, H., Iwakami, W., Furusawa, S., Okawa, H., Harada, A., Sumiyoshi, K., Yamada, S., Matsufuru, H., Imakura, A., “Simulations of Core-Collapse Supernovae in Spatial Axisymmetry with Full Boltzmann Neutrino Transport”, The Astrophysical Journal, IOP publishing, Volume 854, Issue 2, article id. 136 (13 pp), 2018

Presentations

Oral

  1. Harada, A., “Influences of Nuclear EOS on Core-collapse Supernova Simulations by the Boltzmann-radiation-hydrodynamics”, Probe into core-collapse SuperNovae via Gravitational-Wave and neutrino signals (SNeGWv2021), No. 5, 12/1-2 (2021), Online
  2. Harada, A., “Possible collective neutrino oscillation induced by rotation in a core-collapse supernova simulation with the Boltzmann neutrino transport”, INT Electronic Workshop 21-79W New Directions in Neutrino Flavor Evolution in Astrophysical Systems, No. 34, 9/20-24 (2021), Online
  3. Harada, A., “Progress of the Boltzmann-radiation-hydrodynamics Simulations for Core-collapse Supernovae (C02 theory report)”, The Fourth Annual Area Symposium Online, No. 22, 2/22&24 (2021), Online
  4. Harada, A., “Core-collapse Supernova Simulations with the Boltzmann-neutrino transport using the SN method”, CHALLENGES AND INNOVATIONS IN COMPUTATIONAL ASTROPHYSICS - II (ChaICA - II), No. 28, 11/18-21 (2020), Online
  5. Harada, A., “Recent Progress of the Core-collapse Supernova Simulations under axisymmetry with the Boltzmann-radiation-hydrodynamics code”, The Evolution of Massive Stars and Formation of Compact Stars: from the Cradle to the Grave, No. 11, 2/26-28 (2020), Tokyo, Japan
  6. Harada, A., “Supernova simulations with the Boltzmann Neutrino Transport (C02 theory report)”, Joint symposium of MEXT innovative area x KONAN GAKUEN 100th Anniversary International Scientific Symposium Series Sponsored by The Hirao Taro Foundation of KONAN GAKUEN for Academic Research, No. 49, 2/10-12 (2020), Hyogo, Japan
  7. Harada, A., “Boltzmann-radiation-hydrodynamics simulations of the stellar core-collapse under axisymmetry - status report of group C02 of GW-genesis- (part 2)”, Multi-dimensional Modeling and Multi-Messenger observation from Core-Collapse Supernovae (4M-COCOS), No. 6, 10/21-24 (2019), Fukuoka, Japan
  8. Harada, A., “Neutrino Distributions for a Rotating Core-collapse Supernova with a Boltzmann-neutrino-transport”, TAUP2019 - 16th International Conference on Topics in Astroparticle and Underground Physics, ID. 366 (session HECR#1), 9/9-13 (2019), Toyama, Japan
  9. Harada, A., “Multi-dimensional core-collapse supernova simulations with the Boltzmann-radiation-hydrodynamics code”, MICRA2019 - Microphysics In Computational Relativistic Astrophysics, No. 16, 8/12-16 (2019), Jena, Germany
  10. Harada, A., “Stellar core-collapse simulations with the Boltzmann-radiation-hydrodynamics code under axisymmetry”, The 15th International Symposium on Origin of Matter and Evolution of Galaxies (OMEG15), No. 10-2, 7/2-5 (2019), Kyoto, Japan
  11. Harada, A., “The rotating core-collapse supernova simulation by Boltzmann-radiation transport”, The 4th ALPS Symposium on Photon Science, No. 5, 3/28 (2018), Tokyo, Japan
  12. Harada, A., Iwakami, W., Okawa, H., Yamada, S., Nagakura, H., Sumiyoshi, K., Matsufuru, H., Imakura, A., “The Rotating Core-Collapse Supernova Simulation with Full Boltzmann Neutrino Transport”, Workshop on the Progenitor-Supernova-Remnant Connection, No. 29, 7/24-28 (2017), Kreuth, Germany
  13. Harada, A., Yamada, S., “Toward general relativistic supernovae simulations”, The Third ALPS Symposium on Photon Science, No. 4, 3/24 (2017), Tokyo, Japan
  14. Harada, A., Iwakami, W., Yamada, S., “Systematic study of the acoustic mechanism for core-collapse supernovae”, Many Riddles About Core-Collapse Supernovae, No. 27, 6/27-7/1 (2016), Tokyo, Japan
  15. Harada, A., Iwakami, W., Yamada, S., “Systematic study of the acoustic mechanism for core-collapse supernovae”, The Second ALPS Symposium on Photon Science, No. 6, 3/29 (2016), Tokyo, Japan
  16. Harada, A., Iwakami, W., Yamada, S., “Systematic study of the acoustic mechanism for core-collapse supernovae”, 18th Workshop on Nuclear Astrophysics, No. 24, 3/14-19 (2016), Kreuth, Germany

Poster

  1. Harada, A., “Possible collective neutrino oscillation in a rotating supernova”, nuclear burning in massive stars -- towards the formation of binary black holes --, poster 4, 7/26-30 (2021), Online
  2. Harada, A., “Core-collapse simulations of rapidly rotating progenitors by Boltzmann-radiation-hydrodynamics code”, Black Hole Astrophysics with VLBI: Multi-Wavelength and Multi-Messenger Era, poster 4, 1/18-20 (2021), Online
  3. Harada, A., “Neutrino Distributions for a Rotating Core-collapse Supernova with a Boltzmann-neutrino-transport”, F.O.E. Fifty-One Erg 2019, No. 15, 5/20-24 (2019), North Carolina, the US
  4. Harada, A., Yamada, S., Iwakami, W., Okawa, H., Nagakura, H., Sumiyoshi, K., Furusawa, S., Matsufuru, H., “The Neutrino Distributions in the Rotating Core-Collapse Superanova”, Deciphering multi-dimensional nature of core-collapse Supernovae via Gravitational-Wave and neutrino signatures, poster 3, 10/8-10 (2018), Toyama, Japan
  5. Harada, A., Yamada, S., Iwakami, W., Okawa, H., Nagakura, H., Sumiyoshi, K., Furusawa, S., Matsufuru, H., “The Neutrino Distributions in the Rotating Core-Collapse Superanova”, Physics of Core-Collapse Supernovae and Compact Star Formations, poster 4, 3/19-21 (2018), Tokyo, Japan
  6. Harada, A., Iwakami, W., Nagakura, H., Yamada, S., “Systematic study of acoustic mechanisms for core-collapse supernovae”, Numazu Workshop 2015, poster 1, 9/1-4 (2015), Shizuoka, Japan

Contact

Contact is below:

E-mail address: harada _at_ icrr.u-tokyo.ac.jp
Replace _at_ by @.

Office:
High Energy Astrophysics Group in ICRR (room 512)

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