Zhi-Qiu Huang
A5057149015- Astrophysics and Cosmic Phenomena
- Gamma-ray bursts and supernovae
- Dark Matter and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Pulsars and Gravitational Waves Research
- Particle Detector Development and Performance
- Neutrino Physics Research
- Radio Astronomy Observations and Technology
- Particle physics theoretical and experimental studies
- Cosmology and Gravitation Theories
- Solar and Space Plasma Dynamics
- Astronomical Observations and Instrumentation
- Atomic and Subatomic Physics Research
- Radiation Detection and Scintillator Technologies
- Lightning and Electromagnetic Phenomena
- High-Energy Particle Collisions Research
- Precipitation Measurement and Analysis
- Particle Accelerators and Free-Electron Lasers
- Quantum Chromodynamics and Particle Interactions
- Ionosphere and magnetosphere dynamics
- Galaxies: Formation, Evolution, Phenomena
- Economic, financial, and policy analysis
- Scientific Research and Discoveries
- Advanced NMR Techniques and Applications
- Digital Platforms and Economics
Sun Yat-sen Memorial Hospital
2024
Sun Yat-sen University
2014-2024
CEA Paris-Saclay
2021-2023
Université Paris-Saclay
2021-2023
Commissariat à l'Énergie Atomique et aux Énergies Alternatives
2021-2023
ETH Zurich
2023
Max Planck Institute for Physics
2023
École Polytechnique
2023
Centre National de la Recherche Scientifique
2023
Laboratoire Leprince-Ringuet
2023
The Alpha Magnetic Spectrometer (AMS) is a precision particle physics detector on the International Space Station (ISS) conducting unique, long-duration mission of fundamental research in space. objectives include precise studies origin dark matter, antimatter, and cosmic rays as well exploration new phenomena. Following 16-year period construction testing, precursor flight Shuttle, AMS was installed ISS May 19, 2011. In this report we present results based 120 billion charged ray events up...
High-energy photons from the Crab Nebula The contains a pulsar that excites surrounding gas to emit high-energy radiation. combination of pulsar's youth and nearby location makes nebula brightest gamma-ray source in sky. LHAASO Collaboration report observations this at energies tera– peta–electron volts, extending spectrum prototypical object. They combine these data with lower model physics emission process. multiwave-length can be explained by synchrotron radiation inverse Compton...
We report the observation of new properties primary cosmic rays, neon (Ne), magnesium (Mg), and silicon (Si), measured in rigidity range 2.15 GV to 3.0 TV with 1.8×10^{6} Ne, 2.2×10^{6} Mg, 1.6×10^{6} Si nuclei collected by Alpha Magnetic Spectrometer experiment on International Space Station. The Ne Mg spectra have identical dependence above 3.65 GV. three 86.5 GV, deviate from a single power law 200 harden an way. Unexpectedly, rays is different He, C, O. This shows that O are two classes rays.
The central region of the Milky Way is one foremost locations to look for dark matter (DM) signatures. We report first results on a search DM particle annihilation signals using new observations from an unprecedented gamma-ray survey Galactic Center (GC) region, ${\it i.e.}$, Inner Galaxy Survey, at very high energies ($\gtrsim$ 100 GeV) performed with H.E.S.S. array five ground-based Cherenkov telescopes. No significant excess found in 2014-2020 dataset and profile likelihood ratio analysis...
Recurrent Novae are repeating thermonuclear explosions in the outer layers of white dwarfs, due to accretion fresh material from a binary companion. The shock generated by ejected slamming into companion star's wind, accelerates particles very-high-energies. We report very-high-energy (VHE, $\gtrsim100$\,GeV) gamma rays recurrent nova RS\,Ophiuchi up month after its 2021 outburst, using High Energy Stereoscopic System. VHE emission has similar temporal profile lower-energy GeV emission,...
We report the discovery of a UHE gamma-ray source, LHAASO J2108+5157, by analyzing LHAASO-KM2A data 308.33 live days. Significant excess induced showers is observed in both energy bands 25-100 TeV and $\gt$100 with 9.5 sigma 8.5 sigma, respectively. This source not significantly favored as an extensive angular extension smaller than point-spread function KM2A. The measured spectrum from 20 to 200 can be approximately described power-law index -2.83$\pm$ 0.18stat. A harder demanded at lower...
Cosmological and astrophysical observations suggest that 85% of the total matter Universe is made Dark Matter (DM). However, its nature remains one most challenging fundamental open questions particle physics. Assuming DM, this exotic form cannot consist Standard Model (SM) particles. Many models have been developed to attempt unraveling DM such as Weakly Interacting Massive Particles (WIMPs), favored candidates. WIMP annihilations decay could produce SM particles which in turn hadronize...
The kilometer square array (KM2A) of the large high altitude air shower observatory (LHAASO) aims at surveying northern γ-ray sky energies above 10 TeV with unprecedented sensitivity. observations have long been one most powerful tools for dark matter searches, as, e.g., high-energy γ rays could be produced by decays heavy particles. In this Letter, we present first analysis LHAASO-KM2A, using 340 days data from 1/2-KM2A and 230 3/4-KM2A. Several regions interest are used to search a signal...
The colliding-wind binary system $\eta$ Carinae has been identified as a source of high-energy (HE, below $\sim$100\,GeV) and very-high-energy (VHE, above gamma rays in the last decade, making it unique among these systems. With its eccentric 5.5-year-long orbit, periastron passage, during which stars are separated by only $1-2$\,au, is an intriguing time interval to probe particle acceleration processes within system. In this work, we report on extensive VHE observation campaign that for...
The colliding-wind binary system η Carinae has been identified as a source of high-energy (HE, below ∼100,GeV) and very (VHE, above gamma rays in the last decade, making it unique among these systems. With its eccentric 5.5-year-long orbit, periastron passage, during which stars are separated by only $1-2$,au, is an intriguing time interval to probe particle acceleration processes within system. In this work, we report on extensive VHE observation campaign that for first covers full passage...
Abstract A sub-array of the Large High Altitude Air Shower Observatory (LHAASO), KM2A is mainly designed to observe a large fraction northern sky hunt for γ-ray sources at energies above 10 TeV. Even though detector construction still underway, half array has been operating stably since end 2019. In this paper, we present data analysis pipeline and first observation Crab Nebula, standard candle in very high energy astronomy. We detect signals from Nebula both ranges 100 TeV with...
ABSTRACT We study the acceleration of charged particles by ultra-relativistic shocks using test-particle Monte Carlo simulations. Two field configurations are considered: (i) with uniform upstream magnetic in plane shock, and (ii) which has a cylindrical geometry. Particles assumed to diffuse angle due frequent non-resonant scattering on small-scale fields. The steady-state distribution particles’ Lorentz factors is shown approximately satisfy dN/dγ ∝ γ−2.2 provided particle motion dominated...
Abstract It has long been suggested that nearby pulsars within ∼1 kpc are the leading candidate of 10–500 GeV cosmic-ray positron excess measured by PAMELA and other experiments. The recent measurement surface brightness profile TeV nebulae surrounding Geminga PSR B0656+14 High-Altitude Water Cherenkov Observatory (HAWC) suggests inefficient diffusion particles from sources, giving rise to a debate on pulsar interpretation excess. Here we argue observations provide more direct constraints...
Abstract Motivated by the detection of very-high-energy (VHE) gamma rays deep in afterglow emission a gamma-ray burst (GRB), we revisit predictions maximum energy to which electrons can be accelerated at relativistic blast wave. Acceleration weakly magnetized forward shock wave limited either rapid damping turbulence generated behind shock, effect large-scale ambient magnetic field, or radiation losses. Within confines standard, single-zone, synchrotron self-Compton (SSC) model, show that...
ABSTRACT We report on a search for persistent radio emission from the one-off fast burst (FRB) 20190714A, as well two repeating FRBs, 20190711A and 20171019A, using MeerKAT telescope. For FRB we also conducted simultaneous observations with High-Energy Stereoscopic System (H.E.S.S.) in very high-energy gamma rays searched signals ultraviolet, optical, X-ray bands. this FRB, obtain UV flux upper limit of $1.39 \times 10^{-16}~{\rm erg\, cm^{-2}\, s^{-1}}$Å−1, $\sim 6.6 10^{-14}~{\rm s^{-1}}$...
The Alpha Magnetic Spectrometer AMS-02 [1]-[4] is an astro particle physics experiment running on the International Space Station (ISS; see Figure 1) since May 19, 2011. Its missions include search for antimatter and identification of nature dark matter. AMS silicon tracker only subdetector inside permanent magnet that can detect charge a moving to distinguish anti-particle from (see Table 1 nomenclature).
Abstract We report on the observations of four well-localized binary black hole (BBH) mergers by High Energy Stereoscopic System (H.E.S.S.) during second and third observing runs Advanced LIGO Virgo, O2 O3. H.E.S.S. can observe 20 deg 2 sky at a time follows up gravitational-wave (GW) events “tiling” localization regions to maximize covered probability. During O3, observed large portions regions, between 35% 75%, for BBH (GW170814, GW190512_180714, GW190728_064510, S200224ca). For these GW...
Using an eigenfunction expansion to solve the transport equation, complemented by Monte-Carlo simulations, we show that ultrarelativistic shocks can be effective particle accelerators even when they fail produce large amplitude turbulence in downstream plasma. This finding contradicts widely held belief a uniform magnetic field perpendicular shock normal inhibits acceleration first order Fermi process. In limit, find stationary power-law spectrum of index s=4.17 for these shocks, close...
In the Large High Altitude Air Shower Observatory (LHAASO), square kilometer array, with 5249 electromagnetic particle detectors (EDs) and 1188 muon detectors, is deployed to explore gamma-ray sources above 30 TeV unprecedented sensitivity measure primary cosmic rays in energy range from 10 100 PeV. The energetic particles produced by extensive air showers can serve as a continuously available source for calibration of numerous EDs over large area. this study, detector untriggered...
Abstract Magnetar hyperflares are the most plausible explanation for fast radio bursts (FRBs)—enigmatic powerful pulses with durations of several milliseconds and high brightness temperatures. The first observational evidence this scenario was obtained in 2020 April when an FRB detected from direction Galactic magnetar soft gamma-ray repeater SGR 1935+2154. preceded by two outburst alerts BAT instrument aboard Swift satellite, which triggered follow-up observations High Energy Stereoscopic...
Observations with imaging atmospheric Cherenkov telescopes (IACTs) have enhanced our knowledge of nearby supernova (SN) remnants ages younger than 500 yr by establishing Cassiopeia A and the remnant Tycho’s SN as very-high-energy (VHE) γ -ray sources. The Kepler’s SN, which is product most recent naked-eye in Galaxy, comparable age to other two, but significantly more distant. If luminosities SNe are similar, then latter expected be one faintest sources within reach current generation IACT...