A5063992285- Astrophysics and Cosmic Phenomena
- Dark Matter and Cosmic Phenomena
- Neutrino Physics Research
- Gamma-ray bursts and supernovae
- Particle Detector Development and Performance
- Radio Astronomy Observations and Technology
- Particle physics theoretical and experimental studies
- Pulsars and Gravitational Waves Research
- Radiation Detection and Scintillator Technologies
- Geophysics and Gravity Measurements
- Solar and Space Plasma Dynamics
- Atomic and Subatomic Physics Research
- Cosmology and Gravitation Theories
- Astrophysical Phenomena and Observations
- Photocathodes and Microchannel Plates
- Noncommutative and Quantum Gravity Theories
- Ionosphere and magnetosphere dynamics
- Particle Accelerators and Free-Electron Lasers
- Atmospheric Ozone and Climate
- Stellar, planetary, and galactic studies
- Calibration and Measurement Techniques
- Computational Physics and Python Applications
- Astronomical Observations and Instrumentation
- Advanced Neuroimaging Techniques and Applications
- Astronomy and Astrophysical Research
Sun Yat-sen University
2019-2025
University of Johannesburg
2015-2025
Qingdao University of Science and Technology
2025
Northwest A&F University
2025
Southern University of Science and Technology
2023-2024
University of Maryland, College Park
2024
Guangdong Polytechnic of Science and Technology
2023-2024
Istituto Nazionale di Fisica Nucleare, Sezione di Napoli
2023
University of Zurich
2023
Xenon Pharmaceuticals (Canada)
2023
We discuss the possibility that IceCube neutrino telescope might be observing Fermi bubbles. If bubbles discovered in gamma rays originate from accelerated protons, they should strong emitters of high energy ($\ensuremath{\gtrsim}\mathrm{GeV}$) neutrinos. These neutrinos are detectable as showerlike or tracklike events at a ${\mathrm{Km}}^{3}$ observatory. For primary cosmic ray flux with spectrum $\ensuremath{\propto}{E}^{\ensuremath{-}2.1}$ and cutoff above 10 PeV, bubble substantially...
The global energy industry is undergoing a significant transformation driven by the advent of renewable sources. This study proposes polygeneration system that utilizes waste plastics and biomass to produce green methanol in low-carbon efficient manner through plasma gasification, combines supercritical carbon dioxide brayton cycle (SCBC) organic rankine (ORC) for joint power generation. system's thermodynamic performance economic benefits were explored energy, exergy, analyses, footprint...
Abstract Based on the Gaia Data Release 3 and APOGEE data sets, we investigate kinematic differences between young stellar objects (YSOs) their parent clouds in five nearby star-forming regions. Overall, one-dimensional velocity Class II YSOs molecular cloud range from [0, 1.4] km s −1 . In feedback environments dominated by outflows, massive stars, supernova feedback, corresponding 1.4], [0.1, 0.4], 1] , respectively. These results indicate that YSO kinematics are not significantly affected...
Transcription factor DREB1A positively regulates plant chilling stress tolerance. However, its role in regulating seed germination at low temperatures has remained a mystery. Our research unveiled that maize zmdreb1a mutant seeds exhibit decreased ZmMIPS2 expression and lower percentage than the control under temperatures. The overexpression of ZmDREB1A upregulated expression, while mutation DRE motifs promoter nullified influence on target gene expression. In addition, we demonstrated...
Abstract Recently, the LHAASO Collaboration reported first very-high-energy gamma-ray catalog, containing 90 TeV sources. Among these sources, 1LHAASO J1929+1846u is located 0 <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" overflow="scroll"> <mml:mover> <mml:mrow> <mml:mo>.</mml:mo> </mml:mrow> <mml:mtext>°</mml:mtext> </mml:mover> </mml:math> 3 west of SNR G54.1+0.3 and also lies within a +53 km s −1 cloud (the Western Cloud). Moreover, one IceCube track-type high-energy starting...
Ultrahigh-energy cosmic rays (UHECRs), if accelerated in the gamma-ray burst (GRB) blast wave, are expected to produce PeV-EeV neutrinos by interacting with long-lived GRB afterglow photons. Detailed spectral and temporal properties of flux these depend on wave evolution scenario, but can last for days years time scale contrast seconds minutes ``burst'' neutrino contemporaneous prompt emission which has been constrained IceCube $\ensuremath{\sim}50\text{ }\text{...
The origin of sub-TeV gamma rays detected by the Fermi-Large Area Telescope (LAT) from Fermi bubbles (FBs) at Galactic center is still uncertain. In a hadronic model, acceleration protons and/or nuclei and their subsequent interactions with gas in bubble volume can produce observed rays. Recently High Altitude Water Cherenkov (HAWC) observatory reported an absence gamma-ray excess Northern FB $b\ensuremath{\gtrsim}6\ifmmode^\circ\else\textdegree\fi{}$ latitude, which resulted flux upper...
With the breakthrough in PeV gamma-ray astronomy brought about by LHAASO experiment, high-energy sky is becoming richer. Recently, Collaboration reported observation of a diffuse emission with energy up to level from both inner and outer Galactic plane. In these spectra, there bump that hard explain using conventional cosmic-ray transport scenarios. Therefore, we introduce two extra components corresponding unresolved sources exponential-cutoff-power-law (ECPL) spectral shape---one an index...
The Fermi bubbles have been imaged in sub-TeV gamma rays at Fermi-LAT, and, if their origin is hadronic, they might seen with low statistics $\ensuremath{\sim}0.1--1\text{ }\text{ }\mathrm{PeV}$ neutrinos IceCube. We discuss the detectability of these objects new High Altitude Water Cherenkov (HAWC) gamma-ray detector. HAWC will view north bubble for $\ensuremath{\sim}2--3$ hours a day and map its spectrum 0.1--100 TeV. For hard primary proton required to explain five events IceCube, high...
Abstract 4U 1538-522 is a persistent high-mass X-ray binary that exhibits secular spin evolution. In 2019, it underwent torque reversal from spinning up to down. We performed an extensive study using four NuSTAR observations compare temporal and spectral properties during different states. observed no abrupt change in luminosity associated with the reversal. addition, pulse profile, shape, power spectrum remained unchanged before after The orbital superorbital modulation profiles also showed...
We study the detectability of neutrino bursts from nearby direct black hole-forming collapses (failed supernovae) at Megaton detectors. Due to their high energetics, these could be identified - by time coincidence N >= 2 or 3 events within a ~ 1 s window as far 4-5 Mpc away. This distance encloses several supernova-rich galaxies, so that failed supernova detected rate up one per decade, comparable expected more common, but less energetic, neutron star-forming collapses. Thus, detection...
Lorentz violation (LV) induced by Quantum Gravity has been tested at much lower energies than the Planck scale with more and observational evidence. In recent studies, time of flight difference between TeV neutrino MeV photon from Gamma Ray Bursts (GRBs) have used to constrain LV energy scale, based on energy-dependent speed variation. Here, we performed a correlation study updated 7.5 year high-energy starting events (HESE), alert detected IceCube, full sample 7000 GRBs, found six...
The origin of sub-TeV gamma rays detected by Fermi-LAT from the Fermi bubbles at Galactic center is still unknown. In a hadronic model, acceleration protons and/or nuclei and their subsequent interactions with gas in bubble volume can produce observed rays. Such naturally high-energy neutrinos, detection those discriminate between leptonic Additional constraints on gamma-ray flux TeV range recent HAWC observations restrict model parameters, which turn disfavor as large fraction neutrino...
Alfvén waves are found to be ubiquitous in the solar wind. Recent progress observational studies of is reviewed formulate a microscopic picture for Alfvénic fluctuations. The main aspects properties these waves, including wave intervals, propagation, evolution, origin and generation, presented. Then heating acceleration wind plasma briefly introduced. relation rotational tangential discontinuities, magnetic decreases, other relatively large-scale structures such as flux tubes/ropes, clouds...
The association of at least a dozen ultrahigh-energy cosmic-ray (UHECR) events with energy $\gtrsim 55$ EeV detected by the Pierre Auger Observatory (PAO) from direction Centaurus-A, nearest radio galaxy, supports scenario UHECR acceleration in jets galaxies. In this work, we model to very high (VHE,$\gtrsim 100$ \rm GeV) $\gamma$-ray emission Cen A, including GeV hardness Fermi-LAT and TeV HESS. We consider two scenarios: (i) Two zone synchrotron self-Compton (SSC) external-Compton (EC)...
The observation of high-energy neutrinos from extreme astrophysical sources would substantially broaden our understanding phenomena in the universe, and reveal origin cosmic rays. A proposed cubic-kilometer scale neutrino detector located South China Sea, Neutrino Observatory Nanhai (NEON), optimized for detection subPeV range, is expected to explore more multi-messenger era. Here, as a first step toward optimization construction experiment, different designs, configurations, geometry...
Abstract When entering the heliosphere, galactic cosmic rays (GCRs) will encounter solar wind plasma, reducing their intensity. This modulation effect is strongly affected by structure of and heliospheric magnetic field (HMF). To address during maximum cycle 24, we study under a scenario in which weights for A = ±1 are determined HMF, traveling time GCRs simulated SOLARPROP taken into account. We then fit cosmic-ray proton data provided AMS-02 Voyager energy range 4 MeV–30 GeV, confirm that...
The functionalized Cahn--Hilliard (FCH) free energy models phase separation in amphiphilic systems, which possess a component with both hydrophilic and hydrophobic tendencies. We establish the existence of family bilayer structures, described by homoclinic solutions fourth-order dynamical system arising from FCH nongeneric case an equal-depth double well, $W\geq0$. parameter accommodates bilayers variable width, correspond to compression under external pressure. Modulo nondegeneracy...
ABSTRACT Symplectic algorithms are widely used for long-term integration of astrophysical problems. However, this technique can only be easily constructed separable Hamiltonian, as preserving the phase-space structure. Recently, inseparable fourth-order extended explicit symplectic-like methods have been developed by using Yoshida’s triple product with a mid-point map, where algorithm is more effective, stable and also accurate, compared sequent permutations momenta position coordinates,...