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10 papers · 2 filters
External Shock in a Multi-Bursting Gamma-ray Burst: Energy Injection Phase induced by the Later Launched Ejecta
Da-Bin Lin, Bao-Quan Huang, Tong Liu +3
Central engine of gamma-ray bursts (GRBs) may be intermittent and launch several episodes of ejecta separated by a long quiescent interval. In this scenario, an external shock is f…
Black hole hyperaccretion inflow-outflow model. I. long and ultra-long gamma-ray bursts
Tong Liu, Cui-Ying Song, Bing Zhang +2
Long-duration gamma-ray bursts (LGRBs) and ultra-LGRBs (ULGRBs) originate from collapsars, in the center of which a newborn rotating stellar-mass black hole (BH) surrounded by a ma…
Comparison of gravitational waves from central engines of gamma-ray bursts: neutrino-dominated accretion flows, Blandford-Znajek mechanisms, and millisecond magnetars
Tong Liu, Chao-Yang Lin, Cui-Ying Song +1
Neutrino-dominated accretion flow (NDAF) around a rotating stellar-mass black hole (BH) is one of the plausible candidates for the central engines of gamma-ray bursts (GRBs). Becau…
Electron transport with re-acceleration and radiation in the jets of X-ray binaries
Jian-Fu Zhang, Zhi-Ren Li, Fu-Yuan Xiang +1
This paper studies acceleration processes of background thermal electrons in X-ray binary jets via turbulent stochastic interactions and shock collisions. By considering turbulent…
Spatially resolved Fe K spectroscopy of NGC 4945
Andrea Marinucci, Stefano Bianchi, Giuseppina Fabbiano +4
We present the imaging and spectroscopic analysis of the combined Chandra ACIS-S observations of the Compton-thick Seyfert 2 galaxy NGC 4945. We performed a spatially-resolved spec…
Discovery of Kiloparsec Extended Hard X-ray Continuum and Fe K alpha from the Compton Thick AGN ESO428-G014
G. Fabbiano, M. Elvis, A. Paggi +5
We report the discovery of kpc-scale diffuse emission in both the hard continuum (3-6 keV) and in the Fe K alpha line in the Compton Thick (CT) Seyfert galaxy ESO428-G014. This ext…