Akira Harada

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.
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Curriculum Vitae

Position:

Education:

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., Suwa, Y., Harada, M., Koshio, Y., Mori, M., Nakanishi, F., Nakazato, K., Sumiyoshi, K., Wendell, R. A., “Observing Supernova Neutrino Light Curves with Super-Kamiokande. IV. Development of SPECIAL BLEND: a New Public Analysis Code for Supernova Neutrinos”, The Astrophysical Journal, IOP publishing, Volume 954, Issue 1, article id. 52 (13 pp), 2023
2. 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
3. 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
4. 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
5. 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
6. 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
7. 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. Abbar, S., Harada, A., Nagakura, H., “Machine Learning-Based Detection of Non-Axisymmetric Fast Neutrino Flavor Instabilities in Core-Collapse Supernovae”, arXiv, arXiv:2401.10915, 2024
2. Saez, M. M., Rrapaj, E., Harada, A., Nagataki, S., Qian, Y. Z., “Correlations and Distinguishability Challenges in Supernova Models: Insights from Future Neutrino Detectors”, arXiv, arXiv:2401.02531, 2024
3. Arimoto, A. et al. (6th author), “Gravitational Wave Physics and Astronomy in the nascent era”, Progress of Theoretical and Experimental Physics, Volume 2023, Issue 10, id.10A103 (83 pp), 2023
4. 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”, The Astrophysical Journal, IOP publishing, Volume 944, Issue 1, article id. 60 (18 pp), 2023
5. Sumiyoshi, K., Furusawa, S., Nagakura, H., Harada, A., Togashi, H., Nakazato, K., Suzuki, H., “Effects of nuclear matter and composition in core-collapse supernovae and long-term proto-neutron star cooling”, Progress of Theoretical and Experimental Physics, Volume 2023, Issue 1, id.013E02 (32 pp), 2023
6. 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”, The Astrophysical Journal, IOP publishing, Volume 934, Issue 1, article id. 15 (5 pp), 2022
7. 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”, The Astrophysical Journal, IOP publishing, Volume 933, Issue 1, article id. 91 (21 pp), 2022
8. 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
9. 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
10. 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
11. 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
12. 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
13. 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
14. 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., “Probing the properties of the neutron star in SN1987A using neutrino observation data”, Workshop on Neutrino Interaction Measurements for Supernova Neutrino Detection, No. 15, 3/6-10 (2023), Tennessee/Online, the US
2. 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
3. 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
4. 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
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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
11. 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
12. 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
13. 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
14. Harada, A., Yamada, S., “Toward general relativistic supernovae simulations”, The Third ALPS Symposium on Photon Science, No. 4, 3/24 (2017), Tokyo, Japan
15. 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
16. 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
17. 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., “Towards general relativistic Boltzmann-radiation-hydrodynamics simulations of core-collapse supernovae”, Unraveling the History of the Universe and Matter Evolution with Underground Physics (UGAP2024), P25, 3/4-6 (2024), Miyagi, Japan
2. Harada, A., “Theoretical Approach to Supernova Observation and Explosion Model”, Joint RIKEN/N3AS Workshop on Multi-Messenger Astrophysics, No. 3, 11/26 (2023), Hawaii, the US
3. Harada, A., “Probing the properties of NS1987A in SN1987A using neutrino observation data”, SuperVirtual 2022 - From Common to Exotic Transients -, No. 13, 11/7-11 (2022), Online
4. Harada, A., “Rotation-induced collective neutrino oscillation in a core-collapse supernova”, NEUTRINO 2022 XXX International Conference on Neutrino Physics and Astrophysics, P0412, 5/30-6/3 (2022), Online
5. 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
6. 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
7. 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
8. 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
9. 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
10. 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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