Z. C. Huang
A5107343156- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Solar and Space Plasma Dynamics
- Pulsars and Gravitational Waves Research
- Particle Detector Development and Performance
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Cosmology and Gravitation Theories
- Atomic and Subatomic Physics Research
- Neutrino Physics Research
- Galaxies: Formation, Evolution, Phenomena
- Planetary Science and Exploration
- Nuclear Physics and Applications
- Radiation Therapy and Dosimetry
- Particle Accelerators and Free-Electron Lasers
- Ionosphere and magnetosphere dynamics
- Radio Astronomy Observations and Technology
- Geophysics and Gravity Measurements
- Astro and Planetary Science
- Astronomical Observations and Instrumentation
- Particle physics theoretical and experimental studies
Max Planck Institute for Nuclear Physics
2023
Sun Yat-sen University
2013-2019
Precision measurements of cosmic ray positrons are presented up to 1 TeV based on 1.9 million collected by the Alpha Magnetic Spectrometer International Space Station. The positron flux exhibits complex energy dependence. Its distinctive properties (a) a significant excess starting from 25.2±1.8 GeV compared lower-energy, power-law trend, (b) sharp dropoff above 284+91−64 GeV, (c) in entire range is well described sum term associated with produced collision rays, which dominates at low...
Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 1.4 TeV based $28.1\ifmmode\times\else\texttimes\fi{}{10}^{6}$ collected by Alpha Magnetic Spectrometer International Space Station. In entire electron and positron spectra have distinctly different magnitudes dependences. The flux exhibits a significant excess starting $42.{1}_{\ensuremath{-}5.2}^{+5.4}\text{ }\text{ }\mathrm{GeV}$ compared lower trends, but nature of this is above...
GRB221009A is the brightest gamma-ray burst ever detected. To probe very-high-energy (VHE, $>$\!100 GeV) emission, High Energy Stereoscopic System (H.E.S.S.) began observations 53 hours after triggering event, when brightness of moonlight no longer precluded observations. We derive differential and integral upper limits using H.E.S.S. data from third, fourth, ninth nights initial GRB detection, applying atmospheric corrections. The combined yield an energy flux limit $\Phi_\mathrm{UL}^{95\%}...
Context. HESS J1809$-$193 is an unassociated very-high-energy $\gamma$-ray source located on the Galactic plane. While it has been connected to nebula of energetic pulsar PSR J1809$-$1917, supernova remnants and molecular clouds present in vicinity also constitute possible associations. Recently, detection emission up energies $\sim$100 TeV with HAWC observatory led renewed interest J1809$-$193. Aims. We aim understand origin Methods. analysed 93.2 h data taken above 0.27 High Energy...
Geminga is an enigmatic radio-quiet gamma-ray pulsar located at a mere 250 pc distance from Earth. Extended very-high-energy emission around the was discovered by Milagro and later confirmed HAWC, which are both water Cherenkov detector-based experiments. However, evidence for wind nebula in gamma rays has long evaded detection imaging atmospheric telescopes (IACTs) despite targeted observations. The of on angular scales > 2 deg poses considerable challenge background estimation IACT data...
PSR B1259–63/LS 2883 is a gamma-ray binary system that hosts pulsar in an eccentric orbit, with 3.4 yr period, around O9.5Ve star (LS 2883). At orbital phases close to periastron passages, the radiates bright and variable non-thermal emission, for which temporal spectral properties of this emission are, now, poorly understood. In regard, very high-energy (VHE) especially useful study constrain radiation processes particle acceleration system. We report on extensive VHE observation campaign...
Context. HESS J1809$-$193 is an unassociated very-high-energy $γ$-ray source located on the Galactic plane. While it has been connected to nebula of energetic pulsar PSR J1809$-$1917, supernova remnants and molecular clouds present in vicinity also constitute possible associations. Recently, detection emission up energies $\sim$100 TeV with HAWC observatory led renewed interest J1809$-$193. Aims. We aim understand origin Methods. analysed 93.2 h data taken above 0.27 High Energy Stereoscopic...
GRB221009A is the brightest gamma-ray burst ever detected. To probe very-high-energy (VHE, $>$\!100 GeV) emission, High Energy Stereoscopic System (H.E.S.S.) began observations 53 hours after triggering event, when brightness of moonlight no longer precluded observations. We derive differential and integral upper limits using H.E.S.S. data from third, fourth, ninth nights initial GRB detection, applying atmospheric corrections. The combined yield an energy flux limit $Φ_\mathrm{UL}^{95\%}...
Primordial Black Holes (PBHs) are hypothetical black holes predicted to have been formed from density fluctuations in the early Universe. PBHs with an initial mass around $10^{14}-10^{15}$g expected end their evaporation at present times a burst of particles and very-high-energy (VHE) gamma rays. Those rays may be detectable by High Energy Stereoscopic System (H.E.S.S.), array imaging atmospheric Cherenkov telescopes. This paper reports on search for bursts VHE H.E.S.S., ranging 10 120...
Geminga is an enigmatic radio-quiet gamma-ray pulsar located at a mere 250 pc distance from Earth. Extended very-high-energy emission around the was discovered by Milagro and later confirmed HAWC, which are both water Cherenkov detector-based experiments. However, evidence for wind nebula in gamma rays has long evaded detection imaging atmospheric telescopes (IACTs) despite targeted observations. The of on angular scales > 2 deg poses considerable challenge background estimation IACT data...