683 citations
Counting papers with at most 25 authors, so collaboration author lists do not stand in for the people here.
- Tohoku UniversityJP202 papers
- The University of TokyoJP78 papers
- Kyoto UniversityJP59 papers
- National Astronomical Observatory of JapanJP44 papers
- Kavli Institute for the Physics and Mathematics of the UniverseJP40 papers
- Nagoya UniversityJP33 papers
- The University of OsakaJP32 papers
- Massachusetts Institute of TechnologyUS30 papers
- Institute of Space and Astronautical ScienceJP27 papers
- Japan Aerospace Exploration AgencyJP26 papers
- Ehime UniversityJP24 papers
- Institute of Astronomy and Astrophysics, Academia SinicaTW24 papers
11 papers · 2 filters
High-energy neutrino emission subsequent to gravitational wave radiation from supermassive black hole mergers
Chengchao Yuan, Kohta Murase, Shigeo S. Kimura +1
Supermassive black hole (SMBH) coalescences are ubiquitous in the history of the Universe and often exhibit strong accretion activities and powerful jets. These SMBH mergers are al…
A Jet-Bases Emission Model of the EHT 2017 Image of M87*
Tomohisa Kawashima, Kenji Toma, Motoki Kino +3
We carry out general relativistic ray-tracing radiative-transfer calculations to study whether a localized emission from plasma rings created at the stagnation surface in…
Comprehensive analysis of magnetospheric gaps around Kerr black holes using 1D GRPIC simulations
Shota Kisaka, Amir Levinson, Kenji Toma
Spark gaps are likely the source of plasma in active black hole (BH) magnetospheres. In this paper, we present results of 1D general-relativistic particle-in-cell simulations of a…
Deciphering the Origin of the GeV--TeV Gamma-ray Emission from SS 433
Shigeo S. Kimura, Kohta Murase, Peter Mészáros
We investigate hadronic and leptonic scenarios for the GeV--TeV gamma-ray emission from jets of the microquasar SS 433. The emission region of the TeV photons coincides with the X-…
Probing Particle Acceleration through Broadband Early Afterglow Emission of MAGIC Gamma-Ray Burst GRB 190114C
Katsuaki Asano, Kohta Murase, Kenji Toma
Major Atmospheric Gamma Imaging Cherenkov Telescopes (MAGIC) detected the gamma-ray afterglow of GRB 190114C, which can constrain microscopic parameters of the shock-heated plasma…
High-Energy Neutrino and Gamma-Ray Emission from Tidal Disruption Events
Kohta Murase, Shigeo S. Kimura, B. Theodore Zhang +2
Tidal disruption events (TDE) have been considered as cosmic-ray and neutrino sources for a decade. We suggest two classes of new scenarios for high-energy multi-messenger emission…
Multi-Wave band Synchrotron Polarization of Gamma-Ray Burst Afterglows
Jiro Shimoda, Kenji Toma
Multi-wave band synchrotron linear polarization of gamma-ray burst (GRB) afterglows is studied under the assumption of an anisotropic turbulent magnetic field with a coherence leng…
Soft gamma rays from low accreting supermassive black holes and connection to energetic neutrinos
Shigeo S. Kimura, Kohta Murase, Peter Mészáros
The Universe is filled with a diffuse background of MeV gamma-rays and PeV neutrinos, whose origins are unknown. Here, we propose a scenario that can account for both backgrounds s…
Efficient acceleration of cylindrical jets: effects of radiative cooling and tangled magnetic field
Shuta J. Tanaka, Kenji Toma
Diverging supersonic flows are accelerating, as in the case of a de Laval nozzle, and the same concept has been applied for acceleration of magnetohydrodynamic flows in the univers…
Hadronic High-energy Emission from Magnetically Arrested Disks in Radio Galaxies
Shigeo S. Kimura, Kenji Toma
We propose a novel interpretation that gamma-rays from nearby radio galaxies are hadronic emission from magnetically arrested disks (MADs) around central black holes (BHs). The mag…
Linking extended and plateau emissions of short gamma-ray bursts
Tatsuya Matsumoto, Shigeo S. Kimura, Kohta Murase +1
Some short gamma-ray bursts (SGRBs) show a longer lasting emission phase, called extended emission (EE) lasting , as well as a plateau emission (PE) lasting $…