activity
20042023
most citedFirst M87 Event Horizon Telescope Results. VI. The Shadow and Mass of the Central Black Hole

1.7k citations · 13.8k across the 92 of their papers we have counts for

collaborators

92 papers

physics.bio-ph2023★ 2 cited

An onset model of mutually catalytic self-replicative systems formed by an assembly of polynucleotides

Yasuji Sawada, Yasukazu Daigaku, Kenji Toma

Self-replicability is the unique attribute observed in all the living organisms and the question how the life was physically initiated could be equivalent to the question how self-…

astro-ph.HE2023★ 10 cited

High-energy neutrino emission associated with gravitational-wave signals: effects of cocoon photons and constraints on late-time emission

Riki Matsui, Shigeo S. Kimura, Kenji Toma +1

We investigate prospects for the detection of high-energy neutrinos produced in the prolonged jets of short gamma-ray bursts (sGRBs). The X-ray lightcurves of sGRBs show extended e…

astro-ph.HE2022★ 13 cited

Simultaneous Radio and Optical Polarimetry of GRB 191221B Afterglow

Yuji Urata, Kenji Toma, Stefano Covino +16

Gamma-ray bursts (GRBs) are the most luminous transients in the universe and are utilized as probes of early stars, gravitational wave counterparts, and collisionless shock physics…

astro-ph.HE2022★ 21 cited

Magnetic Reconnection in Black-Hole Magnetospheres: Lepton Loading into Jets, Superluminal Radio Blobs, and Multi-wavelength Flares

Shigeo S. Kimura, Kenji Toma, Hirofumi Noda +1

Supermassive black holes in active galactic nuclei launch relativistic jets, as indicated by observed superluminal radio blobs. The energy source of these jets is widely discussed…

astro-ph.HE2022★ 69 cited

The Photon Ring in M87*

Avery E. Broderick, Dominic W. Pesce, Paul Tiede +48

We report measurements of the gravitationally lensed secondary image -- the first in an infinite series of so-called "photon rings" -- around the supermassive black hole M87* via s…

astro-ph.HE2022★ 11 cited

Synchrotron Polarization of Gamma-Ray Burst Afterglow Shocks with Hydrodynamic-scale Turbulent Magnetic Field

Asuka Kuwata, Kenji Toma, Shigeo S. Kimura +2

Afterglows of gamma-ray bursts (GRBs) are emitted from expanding forward shocks, which are expected to have magnetic field much stronger than the interstellar field, although the o…