38 citations · 233 across the 18 of their papers we have counts for
17 papers · 1 filter
R-process nucleosynthesis from magnetar giant flares in neutron star--white dwarf mergers: A unified picture for peculiar long gamma-ray bursts
Shu-Qing Zhong, Long Li, Le Zou +3
Peculiar long gamma-ray bursts (GRBs), exemplified by GRBs 211211A and 230307A, exhibit a long-duration multi-component prompt emission, an X-ray plateau in their afterglow, and a…
Event Rate Density and Luminosity Function of Newborn-Magnetar-Driven X-Ray Transients from Neutron Star Binary Mergers
Le Zou, Ji-Gui Cheng, Rui-Chong Hu +2
X-ray transients (XTs) driven by newborn magnetars from mergers of neutron star binaries (NSBs) were occasionally detected in the narrow-field {\it Chandra} Deep Field-South survey…
Revisiting the search for dark matter subhalos using the Fermi-LAT 4FGL-DR4 catalog
Ji-Gui Cheng, Le Zou
Numerical simulations suggest that dark matter halos surrounding galaxies host numerous small subhalos, which might be detectable by the Fermi-LAT. In this work, we revisit the sea…
Quasi-periodic Oscillations in GRB 210514A: a Case of a Newborn Supra-Massive Precessing Magnetar Collapsing into a Black Hole?
Le Zou, Ji-Gui Cheng
Magnetar is proposed as one of the possible central engines for a gamma-ray burst (GRB). Recent studies show that if a magnetar has a rotational axis misaligned from the magnetic o…
Search for the gamma-ray spectral lines with the DAMPE and the Fermi-LAT observations
Ji-Gui Cheng, Yun-Feng Liang, En-Wei Liang
Weakly interacting massive particles, as a major candidate of dark matter (DM), may directly annihilate or decay into high-energy photons, producing monochromatic spectral lines in…
Confining Burst Energy Function and Spectral Fringe Pattern of FRB 20121102A with Multifrequency Observations
Fen Lyu, Ji-Gui Cheng, En-Wei Liang +3
The observed spectral shapes variation and tentative bimodal burst energy distribution (E-distribution) of fast radio burst (FRB) 20121102A with the FAST telescope are great puzzle…
Hard TeV Gamma-Ray Afterglows of Nearby GRB 190829A as a Tentative Signature of Ultra-High-Energy Cosmic Rays Accelerated in Gamma-Ray Burst Jets
Jian-Kun Huang, Xiao-Li Huang, Ji-Gui Cheng +3
The observed hard TeV gamma-ray spectrum of the nearby gamma-ray burst (GRB) 190829A may challenge the conventional leptonic GRB afterglow model. It has been proposed that an ultra…
Search for gamma-ray line signals around the black hole at the galactic center with DAMPE observation
Tian-Ci Liu, Ji-Gui Cheng, Yun-Feng Liang +1
The adiabatic growth of a black hole (BH) may enhance the dark matter (DM) density surrounding it, causing a spike in the DM density profile. The spike around the supermassive BH a…
TeV and keV-MeV Excesses as Probes for Hadronic Process in BL Lacertaes
Ji-Gui Cheng, Xiao-Li Huang, Ze-Rui Wang +2
A hard TeV -ray component excess over the single-zone leptonic model prediction (TeV excess) is observed in the spectral energy distributions (SEDs) of some BL Lacs. Its origin…
Comparison of the Characteristics of Magnetars Born in Death of Massive Stars and Merger of Compact Objects With {\em Swift} Gamma-Ray Burst Data
Le Zou, En-Wei Liang, Shu-Qing Zhong +6
Assuming that the shallow-decaying phase in the early X-ray lightcurves of gamma-ray bursts (GRBs) is attributed to the dipole radiations (DRs) of a newborn magnetar, we present a…
The Changing Look Blazar B2 1420+32
Hora D. Mishra, Xinyu Dai, Ping Chen +22
Blazars are active galactic nuclei with their relativistic jets pointing toward the observer, with two major sub-classes, the flat spectrum radio quasars and BL Lac objects. We pre…
Effect of axion-like particles on the spectrum of the extragalactic gamma-ray background
Yun-Feng Liang, Xing-Fu Zhang, Ji-Gui Cheng +3
Axion-like particles (ALPs) provide a feasible explanation for the observed lower TeV opacity of the Universe. If the anomaly TeV transparency is caused by ALPs, then the fluxes of…
Afterglow Synchrotron Radiations follow the relation of Gamma-Ray Bursts? Cases of GRBs 190114C, 130427A, and 180720B
Xiao-Li Huang, En-Wei Liang, Ruo-Yu Liu +2
Bimodal spectral energy distributions (SEDs) of gamma-ray burst (GRB) afterglow of GRBs 190114C, 130427A and 180720B confirm that they are originated from the synchrotron emission…
Revisiting the analysis of axion-like particles with the Fermi-LAT gamma-ray observation of NGC1275
Ji-Gui Cheng, Ya-Jun He, Yun-Feng Liang +2
In this work, we re-analyze the Fermi-LAT observation of NGC 1275 to search for axion-like particle (ALP) effects and constrain ALP parameters. Instead of fitting the observed spec…
Precursors in Short Gamma-ray Bursts as a Possible Probe of Progenitors
Shu-Qing Zhong, Zi-Gao Dai, Ji-Gui Cheng +2
We extract 18 candidate short gamma-ray bursts (SGRBs) with precursors from 660 SGRBs observed by {\em Fermi} and {\em Swift} satellites, and carry out a comprehensive analysis on…
Characteristics of Two-episode Emission Patterns in {\em Fermi} Long Gamma-Ray Bursts
Lin Lan, Hou-Jun Lü, Shu-Qing Zhong +8
Two-episode emission components separated by quiescent gaps in the prompt emission of gamma-ray bursts (GRBs) have been observed in the {\em Swift} era, but there is a lack of spec…
{\em Fermi}/GBM Short Gamma-ray Burst Catalog and Case Study for GRB 170817A/GW 170817
Rui-Jing Lu, Shen-Shi Du, Ji-Gui Cheng +4
Motivating by the discovery of association between GW 170817 and sGRB 170817A, we present a comprehensive analysis for sGRBs observed with Fermi/GBM in 9 operation years and study…