Last Updated :2021/04/28

Affiliations, Positions
Graduate School of Advanced Science and Engineering, Assistant Professor
Web Site
Other Contact Details
Hiroshima Univ., 1-3-1, Kagamiyama, Higashi Hiroshima City, Hiroshima, Japan 739-8526, Japan
TEL : (+81)82-424-7369 FAX : (+81)
I have been studying the energy extraction mechanism from compact objects such as neutron star and black holes, and the energy conversion mechanism for plasma kinetic energy and radiation near the stars, especially the particle acceleration and electromagnetic radiation by a strong electric field that fluctuates violently like discharge phenomenon and the production of a large amount of plasma by an electromagnetic cascade under extreme environments such as strong gravity, high density, and strong electromagnetic fields.

Basic Information

Major Professional Backgrounds

  • 2012/04, Institute for Cosmic Ray Research, The University of Tokyo, Postdoctoral Researcher
  • 2014/04, KEK, Theory Center, Institute of Particle and Nuclear Studies, Project Researcher
  • 2016/02, Kyoto University, Graduate school of Science, Project Researcher
  • 2016/04, Aoyama Gakuin University, College of Science and Engineering, JSPS Research Fellow (PosDoc)
  • 2019/03, Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Researcher

Educational Backgrounds

  • Hiroshima University, Graduate School of Science, Department of Physics, Japan, 2009/04, 2012/03
  • Hiroshima University, Graduate School of Science, Department of Physics, Japan, 2007/04, 2009/03
  • Hiroshima University, Faculty of Science, Department of Physics, Japan, 2003/04, 2007/03

Academic Degrees

  • Master of science, Hiroshima University
  • Ph. D. (Science), Hiroshima University

In Charge of Primary Major Programs

  • Physics

Research Fields

  • Mathematical and physical sciences;Physics;Particle / Nuclear / Cosmic ray / Astro physics

Research Keywords

  • High-energy astrophysics
  • Black holes
  • Neutron stars

Affiliated Academic Societies

Educational Activity

Course in Charge

  1. 2021, Undergraduate Education, Second Semester, Exercises in Mechanics

Research Activities

Academic Papers

  1. Enhanced x-ray emission coinciding with giant radio pulses from the Crab Pulsar, Science, 372(6538), 187-190, 2021
  2. Evolution of magnetic deformation in neutron star crust, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 502(2), 2097-2104, 2021
  3. Comprehensive Analysis of Magnetospheric Gaps around Kerr Black Holes Using 1D GRPIC Simulations, ASTROPHYSICAL JOURNAL, 902(1), 2020
  4. Suzaku and Fermi view of the supernova remnant 3C 396, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 492(1), 1484-1491, 2020
  5. Relativistic fireball reprise: radio suppression at the onset of short magnetar bursts, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 483(3), 4175-4186, 2019
  6. Exponentially Decaying Extended Emissions Following Short Gamma-Ray Bursts with a Possible Luminosity-E-folding Time Correlation, ASTROPHYSICAL JOURNAL, 877(2), 2019
  7. Observational diversity of magnetized neutron stars, REPORTS ON PROGRESS IN PHYSICS, 82(10), 2019
  8. Upscattered Cocoon Emission in Short Gamma-Ray Bursts as High-energy Gamma-Ray Counterparts to Gravitational Waves, ASTROPHYSICAL JOURNAL LETTERS, 887(1), 2019
  9. Hitomi X-ray studies of giant radio pulses from the Crab pulsar, PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 70(2), 2018
  10. Is the Macronova in GW170817 Powered by the Central Engine?, ASTROPHYSICAL JOURNAL, 861(1), 2018
  11. Pulsar Wind Nebulae inside Supernova Remnants as Cosmic-Ray PeVatrons, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 478(1), 926-931, 2018
  12. Scattered Short Gamma-Ray Bursts as Electromagnetic Counterparts to Gravitational Waves and Implications of GW170817 and GRB 170817A, ASTROPHYSICAL JOURNAL, 867(1), 2018
  13. Magnetar Broadband X-Ray Spectra Correlated with Magnetic Fields: Suzaku Archive of SGRs and AXPs Combined with NuSTAR, Swift, and RXTE, Astrophysical Journal, Supplement Series, 231(1), 2017
  14. Efficiency of Synchrotron Radiation from Rotation-powered Pulsars, ASTROPHYSICAL JOURNAL, 837(1), 2017
  15. Bimodal Long-lasting Components in Short Gamma-Ray Bursts: Promising Electromagnetic Counterparts to Neutron Star Binary Mergers, ASTROPHYSICAL JOURNAL, 846(2), 2017
  16. Constraints on pulsed emission model for repeating FRB 121102, PUBLICATIONS OF THE ASTRONOMICAL SOCIETY OF JAPAN, 69(6), 2017
  17. X-ray-powered macronovae, ASTROPHYSICAL JOURNAL, 818(2), 2016
  18. Electric Field Screening with Backflow at Pulsar Polar Cap, ASTROPHYSICAL JOURNAL, 829(1), 2016
  19. Wide-Band Spectra of Giant Radio Pulses from the Crab Pulsar, ASTROPHYSICAL JOURNAL, 832(2), 2016
  20. Energy sources and light curves of macronovae, ASTROPHYSICAL JOURNAL, 802(2), 2015
  21. Long-Lasting Black-Hole Jets in Short Gamma-Ray Bursts, ASTROPHYSICAL JOURNAL LETTERS, 804(1), 2015
  22. Isotropic Detectable X-ray Counterparts to Gravitational Waves from Neutron Star Binary Mergers, ASTROPHYSICAL JOURNAL LETTERS, 809(1), 2015
  23. The Evolution of High Temperature Plasma in Magnetar Magnetospheres and its Implications for Giant Flares, ASTROPHYSICAL JOURNAL, 787(1), 2014
  24. Synchrotron X-ray emission from old pulsars, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 443(3), 2063-2076, 2014
  25. Magnetic field configurations of a magnetar throughout its interior and exterior - core, crust and magnetosphere, MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY, 445(3), 2777-2793, 2014
  26. Magnetic field decay with Hall drift in neutron star crusts, Monthly Notices of the Royal Astronomical Society, 421(3), 2722-2730, 2012
  27. TeV cosmic-ray electrons from millisecond pulsars, Monthly Notices of the Royal Astronomical Society, 421(4), 3543-3549, 2012
  28. Multi-wavelength emission region of gamma-ray emitting pulsars, Astrophysical Journal, 739(1), 2011
  29. Mass-dependent evolution of the relation between the supermassive black hole mass and host spheroid mass since z ~ 1, Monthly Notices of the Royal Astronomical Society, 405(2), 1285-1292, 2010
  30. The correlation of black hole mass with metallicity index of host spheroid, Monthly Notices of the Royal Astronomical Society, 390(2), 814-818, 2008

Invited Lecture, Oral Presentation, Poster Presentation

  1. The electromagnetic cascade in neutron star and black hole magnetospheres, Shota Kisaka, High Energy Density Science 2021, 2021/04/19, With Invitation, English
  2. Energy conversion efficiency in magnetospheric gaps around Kerr black holes, Shota Kisaka, Black Hole Astrophysics with VLBI: Multi-Wavelength and Multi-Messenger Era, 2021/01/18, Without Invitation, English

External Funds

Acceptance Results of Competitive Funds

  1. The joint research project of the Institute of Laser Engineering, Osaka University, Theoretical study for experimental verification of coherent radiation and stimulated emission conditions for fast radio bursts, 2021, 2021
  2. Grant-in-Aid for Scientific Research (B), Search for axion dark matter using highly magnetized compact objects, 2021, 2024
  3. Grant-in-Aid for Young Scientists, Electromagnetic cascade in a black hole magnetosphere, 2019, 2021
  4. Grant-in-Aid for Scientific Research (B), Diversity of neutron stars and their magnetospheres, 2018, 2021
  5. Grant-in-Aid for JSPS Fellows, Dissipation mechanisms in compact star magnetospheres and origin of fast radio bursts, 2016, 2018
  6. Grant-in-Aid for JSPS Fellows, Gamma-ray studies for emission of pulsars and the spatial structure near supermassive black holes, 2010, 2011

Social Activities

History as Committee Members

  1. Part-time teacher, 2020, Tohoku Gakuin University
  2. Part-time teacher, 2019, Yamaguchi University
  3. Part-time teacher, 2019, Tohoku Gakuin University

Organizing Academic Conferences, etc.

  1. Yamada Conference LXXI: Gamma-ray Bursts in the Gravitational Wave Era 2019, 2019/10, 2019/11
  2. HEAP2015 Central Engines in the High Energy Universe, 2015/10, 2015/10