Curriculum Vitae
Kenji Toma
(Oct 9, 2023)
Gender: Male
Birth: March 8, 1979; [Place] Osaka, Japan

Nationality: JapaneseWork address:
Frontier Research Institute for Interdisciplinary Sciences, Tohoku University, Sendai
560-0043, Japan[e-mail] toma[at]astr.tohoku.ac.jp
Research Topics: Theoretical Astrophysics
Dynamics of relativistic jets and accretion flows, gamma-ray bursts, active galacticnuclei, supernovae, black holes, neutron stars, non-thermal particle acceleration andradiation processes, first generation stars and observational cosmology, observational
tests of fundamental physicsEducation:
Apr 2005-- Mar 2008: Ph.D., Physics, Kyoto University, Japan (Supervisor: Prof.
Takashi Nakamura) ``Probing the Efficiency ofElectron-Proton Coupling in Collisionless Shocks throughthe Radio Polarimetry of Gamma-Ray Burst Afterglows''
Apr 2003-- Mar 2005: M.Sc., Physics, Kyoto University, Japan (Supervisor: Prof.
Takashi Nakamura) ``A Possible Origin of Bimodal
Distribution of Gamma-Ray Bursts''
Apr 1997-- Mar 2001: B.Sc., Physics, Kyoto University, Japan
Employments & Fellowships:
Oct 2023— Professor, Tohoku University
Apr 2018—Sep 2023 Associate Professor, Tohoku University(Sep 2015---Jan 2016 Visiting Researcher in University of Leeds, UK)
Dec 2013—Mar 2018 Assistant Professor, Tohoku University
Apr 2011—Nov 2013 Superlative Posdoc of JSPS Research Fellowships (Supervisor:Prof. Fumio Takahara)

Oct 2008—Mar 2011 Postdoctoral Fellow, Pennsylvania State University, USA(Supervisor: Prof. Peter Meszaros)
Apr 2008—Sep 2008 Reseacher, National Astronomical Observatory of JapanApr 2006—Mar 2008 JSPS Research Fellow (Doctoral Course)(JSPS = Japan Society for the Promotion of Science)
Research Grants:
Apr 2018---Mar 2022 JSPS Grants-in-Aid for Scientific Research, ``Verification ofthe driving mechanism of black hole jets by utilizing the highresolution radio observation data’’, 2,300,000 JPY (for 2018) +3,600,000 JPY per year
Apr 2015---Mar 2017 JSPS Grants-in-Aid for Scientific Research, ``Revealing theDriving Mechanism of Black Hole Jets through Polarization
and General Relativistic Electrodynamics Theories”, 2,500,000
JPY per year
Apr 2011—Mar 2014 Research grant for JSPS fellows, No.231446, ``Revealing theOrigins of Gamma-Ray Bursts’’, 2,500,000 JPY per year
Sep 2009—Oct 2010

Co-I., NASA Fermi GI program (Cycle 2, ID 21312),``Theoretical Models of Gamma-Ray Bursts in Light of theFermi LAT-GBM Observations’’, $ 90,000

Apr 2006—Mar 2008 Research grant for JSPS fellows, No.182666, ``A Unification
Model of Gamma-Ray Bursts’’, 900,000 JPY per year
Awards:The Commendation for Science and Technology by the Minister of Education, Culture,Sports, Science and Technology, the Young Scientists’ Prize
Young Scientist Award of the Physical Society of Japan
ASJ (Astronomical Society of Japan) Young Astronomer Award
Professional Services:
Jan 2018-- Event Horizon Telescope Collaboration
Oct 2012-- X-ray and gamma-ray polarimeter mission PolariS groupOct 2011-- Hiroshima University Kanata telescope groupOct 2011-- GRB polarimeter (GAP) group
Nov 2009-- Cherenkov telescope mission CTA groupJun 2009-- Gamma-ray polarimeter mission POLAR groupSep 2008--Apr 2011 Fermi satellite, GRB teamFeb 2008-- X/gamma-ray polarimeter mission POET group
Scientific organization committee of international conference- Dawn of a New Era for Black Hole Jets in Active Galaxies, Tohoku University,Japan, Jan 25-27, 2018
- 2nd Core-U International Conference: Cosmic Polarimetry from Micro to Macro
Scales, Hiroshima University, Japan, Feb 17-18, 2017
- IAU Symposium 324: New Frontiers in Black Hole Astrophysics, Slovenia,
Sep 12-16, 2016

Referee for scientific journals:
Astrophysical Journal; Monthly Notices of the Royal Astronomical Society; Astronomy& Astrophysics; Astronomical Notes (Astronomische Nachrichten); Progress ofTheoretical and Experimental Physics; Publication of Astronomical Society of Japan;
Galaxies; Symmetry
Presentations at International Conferences:
1. Toma, K. (invited talk), “GRB polarization: an overview”, `Gamma-Ray Bursts in theGravitational Wave Era 2019’, Yokohama, Oct 30, 2019
2. Toma, K. (invited talk), “M87 black hole shadow image and its connection with theradio jet”, High Energy Astrophysics Japan Israel Workshop, RIKEN, Jul 19, 2019
3. Toma, K. (invited talk), “Formation and dissipation mechanisms of AGN jets”, `Jetand Shock Breakouts in Cosmic Transients’, Kyoto, May 17, 2018
4. Toma, K. (invited talk), “Theoretical and Observational Studies on Relativistic Jets
Driven by Black Holes”, `27th Workshop on General Relativity and Gravitation inJapan’, Hiroshima U, Nov 27, 2017
5. Toma, K. (invited talk), “Theoretical Studies of GRBs with Multi-wavelengthpolarimetry”, `2nd Core-U International Conference: Cosmic Polarimetry from Microto Macro Scales’, Hiroshima U, Feb 18, 2017
6. Toma, K. (invited talk), “Acceleration and Collimation of Relativistic Jets”,`Challenges of AGN Jets’, NAOJ, Mitaka, Jan 19, 2017
7. Toma, K., Urata, Y. (invited talk), “Radio Polarimetric Study of Gamma-Ray Bursts”,`SMA science in the next decade’, ASIAA, Taiwan, Oct 28, 2016
8. Toma, K., Takahara F. (oral), “Causal Production of the Electromagnetic EnergyFlux in Blandford-Znajek process”, `IAU324: New Frontiers in Black HoleAstrophysics’, Ljubljana, Slovenia, Sep 13, 2016
9. Toma, K., Takahara F. (oral), “Causal Production of the Electromagnetic EnergyFlux in Blandford-Znajek process”, `M87 Workshop’, ASIAA, Taiwan, May 24, 2016
10. Toma, K. Takahara F. (oral), “Relation between the Blandford-Znajek process andPenrose process”, `Relativistic Jets: Creation, Dynamics, and Internal Physics’,
Krakow, Poland, Apr 20, 2015
11. Toma, K. (invited talk), “First Stars Signatures in GRBs”, `ISSI-BJ workshop:GRBs: A Tool to Explore the Young Universe’, Beijing, China, Apr 14, 2015
12. Toma, K. (oral), “Probing the GRB Emission Mechanism through the gamma- andX-ray polarimetry”, `Supernovae and Gamma-ray Bursts in Kyoto’, Kyoto, Nov 2013
13. Toma, K., Takahara F. (oral), "Efficient Acceleration of Relativistic MHD Jets",`Gravitational Waves: Revolution in Astronomy & Astrophysics', Kyoto, June 2013
14. Toma, K. (invited talk) "Polarization of GRB Prompt Emission", `GRB 2013',
Nashville, Tennessee, USA, Apr 2013 (Toma, eConf Proceedings C1304143,arXiv:1308.5733)
15. Toma, K. (invited talk) ``Strict Limit on CPT Violation from Polarization ofGamma-Ray Bursts", `TeVPA 2012', Mumbai, India, Dec 2012
16. Toma, K. (invited talk) ``Population III GRBs and their Afterglows", `13th Marcel
Grossman Meeting', Stockholm, Sweden, July 2012
17. Toma, K. (invited talk) ``Polarization of GRB Prompt Emission and EarlyAfterglows", `13th Marcel Grossman Meeting', Stockholm, Sweden, July 2012
18. Toma, K., Takahara F. (oral) ``Baryon Loading of AGN Jets Mediated by Neutrons",`Black Holes by the Black Sea', Istanbul, Turkey, June 2012
19. Toma, K. (invited talk) ``Recent Progress in GRB study", `HEAP2011', Tsukuba
KEK, Japan, Nov 2011
20. Toma, K., Sakamoto, T., Meszaros, P. (invited talk) ``Population III Gamma-RayBursts", `GRBs As Probes', Como, Italy, May 2011 (Toma et al., MSAIS, 21, 76(2012))
21. Toma, K., Wu, X.-F., Meszaros, P. (oral) ``A Photosphere-Internal Shock Model ofGamma-Ray Bursts: Implications for the Fermi/LAT Results", `Gamma-Ray Bursts
2010', Annapolis, USA, Nov 2010
22. Toma, K., Wu, X.-F., Meszaros, P. (poster) ``A Photosphere-Internal Shock Model ofGamma-Ray Bursts: Implications for the Fermi/LAT Results", `The First Galaxies,
Quasars, and Gamma-Ray Bursts', PSU, USA, June 2010
23. Toma, K., Wu, X.-F., Meszaros, P. (poster), ``An External Inverse Compton Emission

Model of Gamma-Ray Burst High-Energy Lags", `2009 Fermi Symposium',
Washington DC, USA, Nov 2009 (Toma et al., eConf Proceedings C091122,arXiv:0912.3277)
24. Toma, K., Sakamoto, T., Zhang, B., et al., (poster) ``Statistical Properties ofGamma-Ray Burst Polarization'', `Huntsville Gamma-Ray Burst Symposium 2008',
Huntsville, USA, Oct 2008
25. Toma, K. (invited talk), ``Statistical Properties of Gamma-Ray Burst Polarization'',`2008 Nanjing GRB Conference', Nanjing, China, June 2008
26. Toma, K. (oral), ``Gamma-Ray Burst Polarization'', `Accelerators in the Universe',Tsukuba, KEK, Mar 2008
27. Toma, K., Ioka, K., Nakamura, T. (poster) ``Probing the Efficiency of ElectronAcceleration in Collisionless Shocks through the Radio Polarimetry of Gamma-RayBurst Afterglows'', `Gamma-Ray Bursts 2007', Santa Fe, USA, Nov 2007
28. Toma, K., Ioka, K., Sakamoto, T., Nakamura, T. (poster) ``Low-Luminosity GRB
060218: A Collapsar Jet from a Neutron Star?'', `070228: The Next Decade of GRB
Afterglows', Amsterdam, Netherlands, Mar 2007
29. Toma, K., Ioka, K., Sakamoto, T., Nakamura, T. (oral) ``Low-Luminosity GRB
060218: A Collapsar Jet from a Neutron Star?'', `The 16th Workshop on General
Relativity and Gravitation', Niigata, Nov 2006
30. Toma, K., Ioka, K., Yamazaki, R., Nakamura, T. (poster) ``Shallow Decay of Early
X-Ray Afterglows from Inhomogeneous Gamma-Ray Burst Jets'', `Gamma-RayBursts in the Swift Era', Washington DC, USA, Nov 2005
31. Toma, K., Yamazaki, R., Nakamura, T. (oral) ``A Unified Model for Gamma-RayBursts'', `Ultra-Relativistic Jets in Astrophysics 2005', Banff, Canada, July 2005
32. Toma, K., Yamazaki, R., Nakamura, T. (oral) ``A Possible Origin of Bimodal
Distribution of Gamma-Ray Bursts'', `The 14th Workshop on General Relativity andGravitation', Kyoto, Nov 2004
33. Toma, K., Yamazaki, R., Nakamura, T. (poster) ``A Possible Origin of Bimodal
Distribution of Gamma-Ray Bursts'', `Gamma-Ray Bursts in the Afterglow Era, 4thWorkshop', Italy, Oct 2004