293 citations · 1.1k across the 27 of their papers we have counts for
27 papers
Multimessenger Constraints on Production Sites of High-Energy Neutrinos from NGC 1068
Abhishek Das, Kohta Murase, B. Theodore Zhang
The detection of high-energy neutrino signals from the nearby Seyfert galaxy NGC 1068 provides us with a unique opportunity to explore nonthermal processes near the center of super…
Multimessenger Prospects for Low-Luminosity Gamma-Ray Bursts: Joint Neutrino and X-Ray Observations
Wenkang Lian, He Gao, Shunke Ai +1
Low--luminosity gamma-ray bursts (LLGRBs) are promising candidates for high-energy neutrinos, yet no coincident neutrino events have been detected so far. Recent advances in X-ray…
Unveiling Multimessenger Emission from Hidden Cores of Microquasars
Yu-Jia Wei, Kohta Murase, B. Theodore Zhang
Microquasars are radio-emitting X-ray binaries with relativistic jets and are established sources of ~TeV gamma rays, making them promising candidates for cosmic-ray acce…
Neutrino and Electromagnetic Signals from Tidal Disruption Events: Bridging the Theory with Observations
Chengchao Yuan, Walter Winter, Cecilia Lunardini +3
This proceeding presents recent results from a joint analysis of time-dependent neutrino and electromagnetic emissions from tidal disruption events (TDEs), using both isotropic win…
Microquasar jet-cocoon systems as PeVatrons
B. Theodore Zhang, Shigeo S. Kimura, Kohta Murase
The origin of Galactic cosmic rays (CRs), particularly around the knee region (3 PeV), remains a major unsolved question. Recent observations by LHAAASO suggest that the knee…
Constraints on Cosmic Rays Acceleration in Bright Gamma-ray Bursts with Observations of Fermi
Xing-Fu Zhang, Ruo-Yu Liu, Hai-Ming Zhang +3
Gamma-ray bursts (GRBs) are widely suggested as potential sources of ultrahigh-energy cosmic rays (UHECRs). The kinetic energy of the jets dissipates, leading to the production of…
Revealing the Production Mechanism of High-Energy Neutrinos from NGC 1068
Abhishek Das, B. Theodore Zhang, Kohta Murase
The detection of high-energy neutrino signals from the nearby Seyfert galaxy NGC 1068 provides us with an opportunity to study nonthermal processes near the center of supermassive…
Structured Jet Model for Multiwavelength Observations of the Jetted Tidal Disruption Event AT 2022cmc
Chengchao Yuan, B. Theodore Zhang, Walter Winter +1
AT 2022cmc is a recently documented tidal disruption event (TDE) that exhibits a luminous jet, accompanied by fast-declining X-ray and long-lasting radio/millimeter emission. Motiv…
Ultraheavy Ultrahigh-Energy Cosmic Rays
B. Theodore Zhang, Kohta Murase, Nick Ekanger +2
We investigate the propagation of ultraheavy (UH) nuclei as ultrahigh-energy cosmic rays (UHECRs). We show that their energy loss lengths at EeV are significantly lon…
Two-component off-axis jet model for radio flares of tidal disruption events
Yuri Sato, Kohta Murase, Mukul Bhattacharya +3
Recently, radio emission from tidal disruption events (TDEs) has been observed from months to years after the optical discovery. Some of the TDEs including ASASSN-14ae, ASASSN-15oi…
A detectable ultra-high-energy cosmic ray outburst from GRB 221009A
Hao-Ning He, B. Thoedore Zhang, Yi-Zhong Fan
Gamma-ray bursts (GRBs) have been proposed as one of promising sources of ultra-high-energy cosmic rays (UHECRs), but observational evidence is still lacking. The nearby B.O.A.T. (…
The origin of very-high-energy gamma-rays from GRB 221009A: implications for reverse shock proton synchrotron emission
B. Theodore Zhang, Kohta Murase, Kunihito Ioka +1
Recently, GRB 221009A, known as the brightest of all time (BOAT), has been observed across an astounding range of orders of magnitude in energy, spanning from radio to VH…
Off-axis MeV and very-high-energy gamma-ray emissions from structured gamma-ray burst jets
Željka Bošnjak, B. Theodore Zhang, Kohta Murase +1
Very-high-energy (VHE) photons around TeV energies from a gamma-ray burst (GRB) jet will play an essential role in the multi-messenger era, with a fair fraction of the events being…
Multi-wavelength afterglow emission from bursts associated with magnetar flares and fast radio bursts
Yujia Wei, B. Theodore Zhang, Kohta Murase
Magnetars have been considered as progenitors of magnetar giant flares (MGFs) and fast radio bursts (FRBs). We present detailed studies on afterglow emissions caused by bursts that…
External Inverse-Compton and Proton Synchrotron Emission from the Reverse Shock as the Origin of VHE Gamma-Rays from the Hyper-Bright GRB 221009A
B. Theodore Zhang, Kohta Murase, Kunihito Ioka +3
The detection of the hyper-bright gamma-ray burst (GRB) 221009A enables us to explore the nature of GRB emission and the origin of very-high-energy (VHE) gamma-rays. We analyze the…
Synchrotron Self-Compton Emission in the Two-Component Jet Model for Gamma-Ray Bursts
Yuri Sato, Kaori Obayashi, B. Theodre Zhang +4
Gamma-ray bursts (GRBs) are intense bursts of high-energy photons (prompt emissions) caused by relativistic jets. After the emissions, multi-wavelength afterglows, from radio to ve…
Candidate Tidal Disruption Event AT2019fdr Coincident with a High-Energy Neutrino
Simeon Reusch, Robert Stein, Marek Kowalski +46
The origins of the high-energy cosmic neutrino flux remain largely unknown. Recently, one high-energy neutrino was associated with a tidal disruption event (TDE). Here we present A…
Post-Merger Jets from Supermassive Black Hole Coalescences as Electromagnetic Counterparts of Gravitational Wave Emission
Chengchao Yuan, Kohta Murase, B. Theodore Zhang +2
As a powerful source of gravitational waves (GW), a supermassive black hole (SMBH) merger may be accompanied by a relativistic jet that leads to detectable electromagnetic (EM) emi…
External Inverse-Compton Emission from Low-Luminosity Gamma-Ray Bursts: Application to GRB 190829A
B. Theodore Zhang, Kohta Murase, Péter Veres +1
The detection of TeV gamma-ray bursts (GRBs) brought new opportunities for studying the physics of particle acceleration at relativistic shocks. The \hess telescopes recently obser…
Energetics of ultrahigh-energy cosmic-ray nuclei
Yu Jiang, B. Theodore Zhang, Kohta Murase
Energetics of the ultrahigh-energy cosmic rays (UHECRs) generated in the universe is crucial for pinning down their candidate sources. Using the recent Auger data on UHECR spectra,…
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…
A Neutral Beam Model for High-Energy Neutrino Emission from the Blazar TXS 0506+056
B. Theodore Zhang, Maria Petropoulou, Kohta Murase +1
The IceCube collaboration reported a excess of neutrino events in the direction of the blazar TXS 0506+56 during a 6 month period in 2014-2015, as well a…
Ultrahigh-energy cosmic-ray nuclei and neutrinos from engine-driven supernovae
B. Theodore Zhang, Kohta Murase
Transrelativistic supernovae (SNe), which are likely driven by central engines via jets or winds, have been among candidate sources of ultrahigh-energy cosmic rays (UHECRs). We inv…
The Giant Radio Array for Neutrino Detection (GRAND): Science and Design
GRAND Collaboration, Jaime Alvarez-Muniz, Rafael Alves Batista +48
The Giant Radio Array for Neutrino Detection (GRAND) is a planned large-scale observatory of ultra-high-energy (UHE) cosmic particles, with energies exceeding 10^8 GeV. Its goal is…