47 citations · 121 across the 11 of their papers we have counts for
15 papers
Multimessenger Constraints on Nuclear Acceleration in Neutrino-Emitting Seyfert Coronae
Chengchao Yuan
High-energy neutrinos from Seyfert galaxies probe particle acceleration near supermassive black holes, but the accelerated nuclear composition remains uncertain. We connect stochas…
A White Dwarf Tidal Disruption by an Intermediate-Mass Black Hole as the Progenitor of Ultra-long GRB 250702B
Chengchao Yuan, Ning Jiang, Zi-Gao Dai
The recent detection of GRB 250702B, the longest gamma-ray burst observed to date with prompt emission lasting seconds, challenges the conventional collapsar…
TeV Gamma-Rays from the Low-Luminosity Active Galactic Nucleus NGC 4278: Implications for the Diffuse Neutrino Background
Chengchao Yuan, Ruo-Yu Liu
This work investigates the origin of the TeV emission detected by the Large High Altitude Air Shower Observatory (LHAASO) from NGC~4278, a galaxy hosting a low-luminosity active ga…
Accelerating SED Modeling of Astrophysical Objects Using Neural Networks
Federico Testagrossa, Georgios Vasilopoulos, Despina Karavola +4
Interpreting the spectral energy distributions (SEDs) of astrophysical objects with physically motivated models is computationally expensive. These models require solving coupled d…
A generalized study of linear electromagnetic cascades in astrophysical sources
Damiano F. G. Fiorillo, Federico Testagrossa, Chengchao Yuan +2
High-energy gamma rays can trigger electromagnetic cascades via pair production on ambient photons, reprocessing their energy to lower frequencies. A classic example is the cascade…
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…
Coupled Time-Dependent Proton Acceleration and Leptonic-Hadronic Radiation in Turbulent Supermassive Black Hole Coronae
Chengchao Yuan, Damiano F. G. Fiorillo, Maria Petropoulou +1
Turbulent coronae of supermassive black holes can accelerate non-thermal particles to high energies and produce observable radiation, but capturing this process is challenging due…
A neutrino flare candidate potentially associated with X-ray emission from tidal disruption event ATLAS17jrp
Rong-Lan Li, Chengchao Yuan, Hao-Ning He +5
Tidal disruption events (TDEs), in which stars are disrupted by supermassive black holes, have been proposed as potential sources of high-energy neutrinos through hadronic interact…
Ultra-High-Energy Cosmic Rays from Neutrino-Emitting Tidal Disruption Events
Pavlo Plotko, Walter Winter, Cecilia Lunardini +1
We revisit the Ultra-High-Energy Cosmic Ray (UHECRs) production in Tidal Disruption Events (TDEs) in the light of recent neutrino-TDE associations. We use an isotropically emitting…
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…
Lepto-Hadronic Scenarios for TeV Extensions of Gamma-Ray Burst Afterglow Spectra
Marc Klinger, Chengchao Yuan, Andrew M. Taylor +1
Recent multi-wavelength observations of gamma-ray burst afterglows observed in the TeV energy range challenge the simplest Synchrotron Self-Compton (SSC) interpretation of this emi…
AT2021lwx: Another Neutrino-Coincident Tidal Disruption Event with a Strong Dust Echo?
Chengchao Yuan, Walter Winter, Cecilia Lunardini
We discuss the possible association of an astrophysical neutrino (IC220405B) with the recently reported, extremely energetic tidal disruption event (TDE) candidate AT2021lwx (ZTF20…
AM: An Open-Source Tool for Time-Dependent Lepto-Hadronic Modeling of Astrophysical Sources
Marc Klinger, Annika Rudolph, Xavier Rodrigues +6
We present the AM ("Astrophysical Multi-Messenger Modeling") software. AM is a documented open source software that efficiently solves the coupled integro-differential equa…
Electromagnetic Cascade Emission from Neutrino-Coincident Tidal Disruption Events
Chengchao Yuan, Walter Winter
The potential association between Tidal Disruption Events (TDEs) and high-energy astrophysical neutrinos implies the acceleration of cosmic rays. These accelerated particles will i…
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…