A5114910050- Astrophysics and Cosmic Phenomena
- Particle physics theoretical and experimental studies
- Dark Matter and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Neutrino Physics Research
- Pulsars and Gravitational Waves Research
- Radio Astronomy Observations and Technology
- Radiation Detection and Scintillator Technologies
- Solar and Space Plasma Dynamics
- Black Holes and Theoretical Physics
- Radiation Therapy and Dosimetry
- Computational Physics and Python Applications
- Astrophysical Phenomena and Observations
- Geophysics and Gravity Measurements
- Noncommutative and Quantum Gravity Theories
- Atomic and Subatomic Physics Research
- Lightning and Electromagnetic Phenomena
- Stellar, planetary, and galactic studies
- Ionosphere and magnetosphere dynamics
- Cosmology and Gravitation Theories
- Astro and Planetary Science
- Graphene research and applications
Institute of High Energy Physics
2016-2025
Chinese Academy of Sciences
2016-2025
Liaoning Normal University
2023-2025
Fujian University of Technology
2025
Zhejiang Normal University
2025
Gansu Great Wall Electrical and Electronics Engineering Research Institute
2021-2024
Institute of Advanced Science Facilities, Shenzhen
2024
Shanghai Institute of Applied Physics
2024
Shanghai Advanced Research Institute
2023
Xinyang Normal University
2023
The measurement of cosmic ray energy spectra, in particular for individual species, is an essential approach finding their origin. Locating the "knees" spectra important part and has yet to be achieved. Here we report a mixed Hydrogen Helium spectrum using combination ARGO-YBJ experiment prototype Cherenkov telescope LHAASO experiment. A knee feature at 640+/-87 TeV, with clear steepening spectrum, observed. This gives fundamental inputs galactic acceleration models.
The events recorded by ARGO-YBJ in more than five years of data collection have been analyzed to determine the diffuse gamma-ray emission Galactic plane at longitudes 25° < l 100° and latitudes . energy range covered this analysis, from ∼350 GeV ∼2 TeV, allows connection region explored Fermi with multi-TeV measurements carried out Milagro. Our analysis has focused on two selected regions plane, i.e., 40° 65° 85° (the Cygnus region), where Milagro observed an excess respect predictions...
The ARGO-YBJ detector is an extensive air shower array that has been used to monitor the northern $\gamma$-ray sky at energies above 0.3 TeV from 2007 November 2013 January. In this paper, we present results of a survey in declination band $-10^{\circ}$ $70^{\circ}$, using data recorded over past five years. With integrated sensitivity ranging 0.24 $\sim$1 Crab units depending on declination, six sources have detected with statistical significance greater than 5 standard deviations. Several...
Measuring the anisotropy of arrival direction distribution cosmic rays provides important information on propagation mechanisms and identification their sources. In fact, flux is thought to be dependent only due presence nearby ray sources or particular magnetic-field structures. Recently, observation unexpected excesses at TeV energy down an angular scale as narrow $\ensuremath{\sim}10\ifmmode^\circ\else\textdegree\fi{}$ raised possibility that problem origin Galactic may addressed by...
To take advantage of the astrophysical potential Gamma-Ray Bursts (GRBs), Chinese and French astrophysicists have engaged SVOM mission (Space-based multi-band astronomical Variable Objects Monitor). Major advances in GRB studies resulting from synergy between space ground observations, implements instrumentation. The scientific objectives put a special emphasis on two categories GRBs: very distant GRBs at z$>$5 which constitute exceptional cosmological probes, faint/soft nearby allow...
This paper reports on the measurement of large-scale anisotropy in distribution cosmic-ray arrival directions using data collected by air shower detector ARGO-YBJ from 2008 January to 2009 December, during minimum solar activity between cycles 23 and 24. In this period, more than 2 × 1011 showers were recorded with energies ∼1 30 TeV. The observed two-dimensional cosmic rays is characterized two wide regions excess deficit, respectively, both relative intensity ∼10−3 respect a uniform flux,...
The Lobster Eye Imager for Astronomy (LEIA), a pathfinder of the Wide-field X-ray Telescope Einstein Probe (EP) mission, was successfully launched onboard SATech-01 satellite Chinese Academy Sciences on 27 July 2022. In this paper, we introduce design and on-ground test results LEIA instrument. Using state-of-the-art Micro-Pore Optics (MPO), wide field-of-view (FoV) 346 square degrees (18.6 * 18.6 degrees) imager is realized. An optical assembly composed 36 MPO chips used to focus incident...
Cosmic rays are hampered by the Moon and a deficit in its direction is expected (the so-called shadow). The shadow an important tool to determine performance of air shower array. Indeed, westward displacement center, due bending effect geomagnetic field on propagation cosmic rays, allows setting absolute rigidity scale primary particles inducing showers recorded detector. In addition, shape permits detector point spread function, while position at high energies evaluation pointing accuracy....
ARGO-YBJ is an air shower detector array with a fully covered layer of resistive plate chambers. It operated high duty cycle and large field view. continuously monitors the northern sky at energies above 0.3 TeV. In this paper, we report long-term monitoring Mrk 421 over period from 2007 November to 2010 February. This source was observed by satellite-borne experiments Rossi X-ray Timing Explorer Swift in band. especially active first half 2008. Many flares are both γ-ray bands...
As one of the brightest active blazars in both X-ray and very high energy $\gamma$-ray bands, Mrk 501 is useful for physics associated with jets from AGNs. The ARGO-YBJ experiment monitoring it $\gamma$-rays above 0.3 TeV since November 2007. Starting October 2011 largest flare 2005 observed, which lasts to about April 2012. In this paper, a detailed analysis reported. During flaring episodes 17 22, 2011, an excess event rate over 6 $\sigma$ detected by direction 501, corresponding increase...
Abstract Oscillation modes of compact stars, in general, can serve as a fingerprint determining the equation state (EOS) dense matter. In this study, we examine impact symmetry energy slope ( L ) on oscillation frequencies neutron stars (NSs) with nucleon–nucleon short range correlation (SRC) and admixed dark matter (DM) for first time within relativistic mean-field theory. By adjusting , revise EOS coupling parameters light SRC DM effects, construct new sets. The results reveal that NSs...
The proton-air cross section in the energy range 1--100 TeV has been measured by ARGO-YBJ cosmic ray experiment. analysis is based on primary flux attenuation for different atmospheric depths (i.e. zenith angles) and exploits detector capabilities of selecting shower development stage means hit multiplicity, density lateral profile measurements at ground. effects fluctuations, contribution heavier primaries uncertainties hadronic interaction models, have taken into account. results used to...
We report the observation of TeV gamma-rays from Cygnus region using ARGO-YBJ data collected 2007 November to 2011 August. Several sources are located in this including two bright extended MGRO J2019+37 and J2031+41. According Milagro set, at 20 is most significant source apart Crab Nebula. No signal detected by experiment, derived flux upper limits 90% confidence level for all events above 600 GeV with medium energy 3 lower than flux, implying that might be variable hard identified as a...
The ARGO-YBJ experiment detects extensive air showers in a wide energy range by means of full-coverage detector which is stable data taking its full configuration since November 2007 at the YBJ International Cosmic Ray Observatory (4300 m a.s.l., Tibet, People's Republic China). In this paper measurement light-component spectrum primary cosmic rays region $(5\textdiv{}200)\text{ }\text{ }\mathrm{TeV}$ reported. method exploited to analyze experimental based on Bayesian procedure. measured...
The ARGO-YBJ air shower detector monitored the Crab Nebula gamma ray emission from 2007 November to 2013 February. integrated signal, consisting of $\sim$3.3 $\times$ 10$^5$ events,reached statistical significance 21.1 standard deviations. obtained energy spectrum in range 0.3-20 TeV can be described by a power law function dN/dE = I$_0$ (E / 2 TeV)$^{-\alpha}$, with flux normalization (5.2 $\pm$ 0.2) 10$^{-12}$ photons cm$^{-2}$ s$^{-1}$ TeV$^{-1}$ and $\alpha$ 2.63 0.05, corresponding an...
In 2008, the blazar Markarian 421 entered a very active phase and was one of brightest sources in sky at TeV energies, showing frequent flaring episodes. Using data ARGO-YBJ, full coverage air shower detector located Yangbajing (4300 m a.s.l., Tibet), we monitored source gamma-ray energies E>0.3 during whole year. The observed flux variable, with strongest flares March June, correlation X-ray enhanced activity. While specific episodes could be several times larger than Crab Nebula one,...
The extended gamma-ray source MGRO J1908+06, discovered by the Milagro air shower detector in 2007, has been observed for ∼4 years ARGO-YBJ experiment at TeV energies, with a statistical significance of 6.2 standard deviations. peak signal is found position consistent pulsar PSR J1907+0602. Parameterizing shape two-dimensional Gauss function, we estimate an extension σext = 049 ± 022, which previous measurement Cherenkov Array H.E.S.S. energy spectrum dN/dE 6.1 1.4 × 10−13 (E/4 TeV)−2.54...
The ARGO-YBJ experiment is a full-coverage air shower detector located at the Yangbajing Cosmic Ray Observatory (Tibet, People's Republic of China, 4300 m a.s.l.). high altitude, combined with technique, allows detection extensive showers in wide energy range and offer possibility measuring cosmic ray proton plus helium spectrum down to TeV region, where direct balloon/space-borne measurements are available. has been stable data taking its full configuration from November 2007 February 2013....
Abstract This paper reports on the observation of sidereal large-scale anisotropy cosmic rays using data collected by ARGO-YBJ experiment over 5 years (2008–2012). analysis extends previous work limited to period from 2008 January 2009 December, near minimum solar activity between cycles 23 and 24. With new sample, cycle 24 maximum is investigated. A method used improve energy reconstruction, allowing us cover a much wider range, 4 520 TeV. Below 100 TeV, dominated two wide regions,...
We report on the extensive multi-wavelength observations of blazar Markarian 421 (Mrk 421) covering radio to gamma-rays, during 4.5 year period ARGO-YBJ and Fermi common operation time, from August 2008 February 2013. In particular, thanks data, whole energy range 100 MeV 10 TeV is covered without any gap. observation period, Mrk showed both low high activity states at all wavebands. The correlations among flux variations in different wavebands were analyzed. Seven large flares, including...
Core–shell NO 2 -LDHs@MMT composites for enhanced chloride adsorption and superior steel corrosion resistance.