81 citations · 455 across the 31 of their papers we have counts for
31 papers
An extra hard spectral component peaking at sub-GeV in the prompt emission of GRB 260226A
Yi-Yun Huang, Hai-Ming Zhang, Ruo-Yu Liu +1
The prompt emission spectra of gamma-ray bursts (GRBs) have long been empirically described by the Band function over the keV--MeV range, whereas several \textit{Fermi}/LAT-detecte…
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…
Detection of a new GeV source in the outer region of the Coma cluster: a signature of external accretion shock ?
Xiao-Bin Chen, Kai Wang, Yi-Yun Huang +4
The supersonic flow motions associated with infall of baryonic gas toward sheets and filaments, as well as cluster mergers, produces large-scale shock waves. The shocks associated…
A two-hump spectrum in the prompt emission of GRB 240825A
Hai-Ming Zhang, Zi-Qi Wang, Cui-Yuan Dai +4
An extra hard spectral component that extends to GeV energies, in additional to the typical sub- MeV Band component, appears in several gamma-ray burst (GRBs) detected by Fermi Lar…
A magnetised Galactic halo from inner Galaxy outflows
He-Shou Zhang, Gabriele Ponti, Ettore Carretti +12
Magnetic halos of galaxies are crucial for understanding galaxy evolution, galactic-scale outflows, and feedback from star formation activity. Identifying the magnetised halo of th…
Mirage Sources and Large TeV Halo-Pulsar Offsets: Exploring the Parameter Space
Yiwei Bao, Ruo-Yu Liu, Gwenael Giacinti +2
We investigate the asymmetric propagation of 100 TeV electrons (whose radiation mainly concentrates on 20--30 TeV) in turbulent magnetic fields around pulsars, using GPU-accelerate…
Mirages and Large TeV Halo-Pulsar Offsets from Cosmic Ray Propagation
Yiwei Bao, Gwenael Giacinti, Ruo-Yu Liu +2
The study of extended -ray sources usually assumes symmetric diffusion of cosmic rays. However, recent observations of multiple sources near single pulsars and significant offse…
Probing the nova shock physics with future gamma-ray observations of the upcoming outburst from T Coronae Borealis
Jian-He Zheng, Hai-Ming Zhang, Ruo-Yu Liu +2
Nova shocks behave like scaled-down supernova remnant shocks with a lifetime of only a few weeks or months, thereby providing a unique opportunity to study the dynamics of non-rela…
Study of γ-ray Emission from a Compact Radio Galaxy with the Fermi Large Area Telescope
Tan-Zheng Wu, Yu-Wei Yu, Ying-Ying Gan +2
The radio galaxy PKS 1007+142 is classified as a compact steep-spectrum source (CSS) and belongs to the class of young Active Galactic Nuclei (AGNs). In this paper, we investigate…
Optimization of performance of the KM2A full array using the Crab Nebula
LHAASO collaboration
The full array of the Large High Altitude Air Shower Observatory (LHAASO) has been in operation since July 2021. For its kilometer-square array (KM2A), we have optimized the select…
X-Ray Polarization Variability of High Spectral Peak BL Lacertaes: Cases of 1ES 1959+650 and PKS 2155-304
Xin-Ke Hu, Yu-Wei Yu, Jin Zhang +5
The high-energy-peaked BL Lacertae objects (HBLs) are the main targets of the Imaging X-ray Polarimetry Explorer (IXPE) for investigating the mechanisms of radiation and particle a…
Evidence for a compact stellar merger origin for GRB 230307A from Fermi-LAT and multi-wavelength afterglow observations
Cui-Yuan Dai, Chen-Lei Guo, Hai-Ming Zhang +2
GRB 230307A is the second brightest gamma-ray burst (GRB) ever detected over 50 years of observations and has a long duration in the prompt emission. Two galaxies are found to be c…
GRB 221009A: revealing a hidden afterglow during the prompt emission phase with Fermi-GBM observations
Hai-Ming Zhang, Yi-Yun Huang, Ruo-Yu Liu +1
Recently, LHAASO reported the detection of brightest-of-all-time GRB 221009A, revealing the early onset of a TeV afterglow. However, there is no evidence of afterglow emission at s…
Constraints on the intergalactic magnetic field strength from -ray observations of GRB 221009A
Yi-Yun Huang, Cui-yuan Dai, Hai-Ming Zhang +2
Characteristics of the cascade gamma-ray signal resulting from very-high-energy gamma-ray sources, such as gamma-ray bursts, can be used to constrain the strength and structure of…
Constraints on the Model of Gamma-ray Bursts and Implications from GRB 221009A: GeV gamma rays v.s. High-energy Neutrinos
Ruo-Yu Liu, Hai-Ming Zhang, Xiang-Yu Wang
Gamma-ray bursts (GRB) are generally believed to be efficient particle accelerators. In the presence of energetic protons in a GRB jet, interactions between these protons and inten…
Detection of GeV emission from an ultra-long gamma-ray burst with the Fermi Large Area Telescope
Yi-Yun Huang, Hai-Ming Zhang, Kai Yan +2
GRB 220627A, detected by Fermi Gamma-ray Burst Monitor (GBM), shows two episodes of gamma-ray emission, which are separated by a {700} s long quiescent phase. Due to similar…
Detection of diffuse gamma-ray emission towards a massive star forming region hosting Wolf-Rayet stars
Kai Wang, Hai-Ming Zhang, Ruo-Yu Liu +1
Isotopic and elemental abundances seen in Galactic cosmic rays imply that of the cosmic-ray (CR) nuclei are probably synthesized by massive Wolf-Rayet (WR) stars. Massiv…
X-ray and GeV-gamma-ray emission property of TeV Compact Symmetric Object PKS 1413+135 and Implication for Episodic Jet Activity
Ying-Ying Gan, Jin Zhang, Su Yao +3
PKS 1413+135, a compact symmetric object (CSO) with a two-side pc-scale structure in its miniature radio morphology, is spatially associated with 4FGL J1416.1+1320 and recently det…
Fermi-LAT Detection of a GeV Afterglow from a Compact Stellar Merger
Hai-Ming Zhang, Yi-Yun Huang, Jian-He Zheng +2
It is usually thought that long-duration gamma-ray bursts (GRBs) are associated with massive star core collapse, whereas short-duration GRBs are associated with mergers of compact…
Interpretation of the light curve of GeV-TeV emission from the 2021 outburst of the recurrent nova RS Ophiuchi
Jian-He Zheng, Yi-Yun Huang, Ze-Lin Zhang +3
Nova outbursts take place in binary star systems comprising a white dwarf (WD) and either a low-mass Sun-like star (classical novae) or, a red giant. GeV gamma-ray emission has bee…
Can a Single Population Account for the Discriminant Properties in Fast Radio Bursts?
Shu-Qing Zhong, Wen-Jin Xie, Can-Min Deng +3
To probe this question, we perform a statistical analysis using the first Canadian Hydrogen Intensity Mapping Experiment Fast Radio Burst (CHIME/FRB) catalog and identify a few dis…
GeV -ray Emission of Compact Steep-Spectrum Source 4C +39.23B
Ying Gu, Hai-Ming Zhang, Ying-Ying Gan +3
Thirteen yr observation data of 4FGL J0824.9+3915 with the Large Area Telescope on board the Fermi Gamma Ray Space Telescope (Fermi/LAT) are analyzed for revisiting whether 4C +39.…
Fermi-LAT detection of extended gamma-ray emission in the vicinity of SNR G045.700.4: evidence for escaping cosmic rays interacting with the surrounding molecular clouds
Hai-Ming Zhang, Ruo-Yu Liu, Yang Su +3
We present the analysis of Fermi Large Area Telecope (LAT) data of the gamma-ray emission in the vicinity of a radio supernova remnant (SNR), G045.700.4. To study the origin of…
GRB 101225A as Orphan Dipole Radiation of a Newborn Magnetar with Precession Rotation in an Off-Axis Gamma-Ray Burst
Le Zou, Tian-Ci Zheng, Xing Yang +5
The unusual multiwavelength lightcurves of GRB 101225A are revisited by assuming that it is from an off-axis GRB powered by a newborn magnetar. We show that its optical afterglow l…