247 citations · 1.8k across the 36 of their papers we have counts for
35 papers · 1 filter
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…
Ultrahigh-Energy Gamma-ray Emission Associated with Black Hole-Jet Systems
The LHAASO Collaboration, Zhen Cao, Felix Aharonian +315
Black holes (BH), one of the most intriguing objects in the universe, can manifest themselves through electromagnetic radiation initiated by the accretion flow. Some stellar-mass B…
Very high energy gamma-ray emission beyond 10 TeV from GRB 221009A
Zhen Cao, F. Aharonian, Q. An +276
The highest energy gamma-rays from gamma-ray bursts (GRBs) have important implications for their radiation mechanism. Here we report for the first time the detection of gamma-rays…
Does or did the supernova remnant Cassiopeia A operate as a PeVatron?
Zhen Cao, F. Aharonian, Q. An +276
For decades, supernova remnants (SNRs) have been considered the prime sources of Galactic Cosmic rays (CRs). But whether SNRs can accelerate CR protons to PeV energies and thus dom…
A tera-electronvolt afterglow from a narrow jet in an extremely bright gamma-ray burst 221009A
LHAASO Collaboration
Some gamma-ray bursts (GRBs) have an afterglow in the tera-electronvolt (TeV) band, but the early onset of this afterglow has not been observed. We report observations with the Lar…
The First LHAASO Catalog of Gamma-Ray Sources
Zhen Cao, F. Aharonian, Q. An +276
We present the first catalog of very-high energy and ultra-high energy gamma-ray sources detected by the Large High Altitude Air Shower Observatory (LHAASO). The catalog was compil…
Measurement of ultra-high-energy diffuse gamma-ray emission of the Galactic plane from 10 TeV to 1 PeV with LHAASO-KM2A
Zhen Cao, F. Aharonian, Q. An +276
The diffuse Galactic -ray emission, mainly produced via interactions between cosmic rays and the interstellar medium and/or radiation field, is a very important probe of the dis…
Features of the gamma-ray pulsar halo HESS J1831098
Kun Fang, Shao-Qiang Xi, Li-Zhuo Bao +2
Gamma-ray pulsar halos are ideal indicators of cosmic-ray propagation in localized regions of the Galaxy and electron injection from pulsar wind nebulae. HESS~J1831098 is a cand…
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…
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…
The physical properties of -ray quiet flat-spectrum radio quasars: why are they undetected by -LAT?
Xue-Jiao Deng, Rui Xue, Ze-Rui Wang +4
During a decade of the -Large Area Telescope (LAT) operation, thousands of blazars have been detected in the -ray band. However, there are still numbers of blazars that h…
Self-consistent interpretations of the multi-wavelength gamma-ray spectrum of LHAASO J06213755
Kun Fang, Shao-Qiang Xi, Xiao-Jun Bi
LHAASO J06213755 is a TeV gamma-ray halo newly identified by LHAASO-KM2A. It is likely to be generated by electrons trapped in a slow-diffusion zone around PSR J06223749 thro…
Neutrino Emission from an Off-Axis Jet Driven by the Tidal Disruption Event AT2019dsg
Ruo-Yu Liu, Shao-Qiang Xi, Xiang-Yu Wang
Recently, a high-energy muon neutrino event was detected in association with a tidal disruption event (TDE) AT2019dsg at the time about 150 days after the peak of the optical/UV lu…
The observation of the Crab Nebula with LHAASO-KM2A for the performance study
F. Aharonian, Q. An, Axikegu +246
As a sub-array of the Large High Altitude Air Shower Observatory (LHAASO), KM2A is mainly designed to cover a large fraction of the northern sky to hunt for gamma-ray sources at en…
Limiting Superluminal Neutrino Velocity and Lorentz Invariance Violation by Neutrino Emission from the Blazar TXS 0506+056
Kai Wang, Shao-Qiang Xi, Lijing Shao +3
The detection of high-energy neutrino coincident with the blazar TXS 0506+056 provides a unique opportunity to test Lorentz invariance violation (LIV) in the neutrino sector. Thank…
The physical properties of -4LAC flat spectrum radio quasars
Can Tan, Rui Xue, Lei-Ming Du +3
In this work, we collect quasi-simultaneous infrared, optical, X-ray and -ray data of 60 -4LAC flat spectrum radio quasars (FSRQs). In the framework of the conventional o…
A serendipitous discovery of GeV gamma-ray emission from supernova 2004dj in a survey of nearby star-forming galaxies with Fermi-LAT
Shao-Qiang Xi, Ruo-Yu Liu, Xiang-Yu Wang +3
The interaction between a supernova ejecta and the circum-stellar medium drives a strong shock wave which accelerates particles (i.e., electrons and protons). The radio and X-ray e…
GeV -ray emission from M33 and Arp~299
Shao-Qiang Xi, Hai-Ming Zhang, Ruo-Yu Liu +1
Star-forming galaxies are huge reservoirs of cosmic rays (CRs) and these CRs convert a significant fraction of their energy into -rays by colliding with the interstellar medium…
Constraints on the intergalactic magnetic field from -ray observations of GRB 190114C
Ze-Rui Wang, Shao-Qiang Xi, Ruo-Yu Liu +2
Very high energy photons from cosmological gamma-ray bursts (GRBs) are expected to interact with extragalactic background light (EBL) and produce electron-positron pairs when they…
Discovery of a spatially extended GeV source in the vicinity of the TeV halo candidate 2HWC J1912+099: a TeV halo or supernova remnant ?
Hai-Ming Zhang, Shao-Qiang Xi, Ruo-Yu Liu +3
Observations by HAWC and Milagro have detected spatially extended TeV sources surrounding middle-aged () pulsars like Geminga and PSR B0656+14, which have…
Tentative evidence of spatially extended GeV emission from SS433/W50
Xiao-Na Sun, Rui-Zhi Yang, Bing Liu +2
We analyze 10 years of Fermi-LAT data towards the SS433/W50 region. With the latest source catalog and diffuse background models, the gamma-ray excess from SS433/W50 is detected wi…
Synchrotron self-Compton emission from external shocks as the origin of the sub-TeV emission in GRB 180720B and GRB 190114C
Xiang-Yu Wang, Ruo-Yu Liu, Hai-Ming Zhang +2
Recently, very high-energy photons above 100 GeV were reported to be detected from GRB~190114C and GRB~180720B at, respectively, 100-1000 s and 10 hours after the burst. We model t…
Comparative study of gamma-ray emission from molecular clouds and star-forming galaxies
Fang-Kun Peng, Shao-Qiang Xi, Xiang-Yu Wang +2
Star-forming regions on different scales, such as giant molecular clouds in our Galaxy and star-forming galaxies, emit GeV gamma-rays. These are thought to originate from hadronic…
GeV observations of the extended pulsar wind nebulae constrain the pulsar interpretations of the cosmic-ray positron excess
Shao-Qiang Xi, Ruo-Yu Liu, Zhi-Qiu Huang +2
It has long been suggested that nearby pulsars within are the leading candidate of the 10-500 GeV cosmic-ray positron excess measured by PAMELA and other exper…