A5075787836- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Astrophysics and Star Formation Studies
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Astronomy and Astrophysical Research
- Quantum Information and Cryptography
- Wind and Air Flow Studies
- High-pressure geophysics and materials
- Atmospheric aerosols and clouds
- Meteorological Phenomena and Simulations
- Geophysics and Gravity Measurements
- Relativity and Gravitational Theory
- Numerical methods for differential equations
- Mechanics and Biomechanics Studies
Nanjing University
2023-2025
Guangxi University
2020-2021
Gamma-ray bursts (GRBs) are among the most luminous electromagnetic transients in universe, providing unique insights into extreme astrophysical processes and serving as promising probes for cosmology. Unlike Type Ia supernovae, which have a unified explosion mechanism, GRBs cannot directly act standard candles tracing cosmic evolution at high redshifts due to significant uncertainties their underlying physical origins. Empirical correlations derived from statistical analyses involving...
Abstract Research on the observational appearance of black holes, both in general relativity and modified gravity, has been full swing since Event Horizon Telescope Collaboration announced photos M87 * Sagittarius A . Nevertheless, limited attention given to impact tilted accretion disks hole images. This paper investigates 230 GHz images non-rotating hairy holes illuminated by tilted, thin Horndeski gravity with aid a ray tracing method. The results indicate that reducing scalar hair...
The X-ray afterglow of many gamma-ray bursts (GRBs) exhibits a plateau phase before the normal power-law decay stage, which may be related to continued activities central engine. Tang et al. 2019 collected 174 such GRBs and confirmed so called $L-T-E$ correlation involves three key parameters, i.e., isotropic $\gamma$-ray energy $E_{\gamma,\rm iso}$ prompt phase, end time $T_{a}$ corresponding luminosity $L_{X}$. In this study, is updated as $L_{X} \propto T_{a}^{-0.99} E_{\gamma ,\rm...
Gamma-ray bursts (GRBs) are among the most luminous electromagnetic transients in universe, providing unique insights into extreme astrophysical processes and serving as promising probes for cosmology. Unlike Type Ia supernovae, which have a unified explosion mechanism, GRBs cannot directly act standard candles tracing cosmic evolution at high redshifts due to significant uncertainties their underlying physical origins. Empirical correlations derived from statistical analyses involving...
Complicated time-dependent curved spacetime and electric field are involved in many astrophysical situations, including the early universe, Hawking radiation, Schwinger effect, gravitational pair production. In this Letter, a generalized quantum two-level model (GQTLM) is developed, which applicable to arbitrary field. The found be consistent with kinetic theory, characterized by its simplicity versatility. momentum distribution of particles effects distortions can correctly described....
<title>Abstract</title> Fast radio bursts (FRBs) are fierce flashes lasting for a few milliseconds from the sky. Although their connection to strongly magnetized neutron stars has been indicated, exact triggering process and radiation mechanism still unknown highly debated. Due extremely short duration, observation of FRBs long difficult task even large telescopes. The difficulty results fact that information obtained in observations is always incomplete, since telescope limited flux...
<title>Abstract</title> Fast radio bursts (FRBs) are fierce flashes from the deep sky. Abundant observations have indicated that highly magnetized neutron stars might be involved in these energetic bursts, but underlying trigger mechanism is still enigmatic. Especially, widely expected periodicity connected to spin of central engine has never been discovered, which leads further debates on nature FRBs. Here we report first discovery a ～ 1.7 s period repeating source FRB 20201124A. This an...
We introduce a novel Rayleigh Doppler lidar (RDLD) system that utilizes high-power single-frequency laser with over 60 W average output power, achieved through fiber solid-state cascade amplification. This represents significant advancement by addressing common challenges such as mode hopping and multi-longitudinal issues. Designed for atmospheric wind temperature profiling, the operates effectively between altitudes of 30 km 70 km. Key performance metrics include speed measurement errors...
A Kepler solver is an analytical method used to solve a two-body problem. In this paper, we propose new correction by slightly modifying the solver. The only change solutions that obtainment of eccentric anomaly relies on true associated unit radial vector calculated integrator. This scheme rigorously conserves all integrals and orbital elements except mean longitude. However, energy, angular momentum Laplace-Runge-Lenz for perturbed problems are slowly-varying quantities. their integral...
We mainly focus on the effects of small changes parameters dynamics charged particles around Kerr black hole surrounded by an external magnetic field, which can be considered as a tidal environment. The radial motions equatorial plane are studied via effective potential. It is found that particle energies at local maxima values potentials increase with spin and angular momenta, but decrease one inductive charge parameter field parameter. radii stable circular orbits also increase, whereas...
Abstract Some fast radio bursts (FRBs) exhibit repetitive behaviors, and their origins remain enigmatic. It has been argued that repeating FRBs could be produced by the interaction between a neutron star an asteroid belt. Here, we consider systems in which belt dwells around massive star, while as companion of interacts with through gravitational force. Various orbital configurations are assumed for system. Direct N -body simulations performed to investigate dynamical evolution asteroids' is...
The inner shadow of a black hole, as projection the event horizon, is regarded potential tool for testing gravitational theories and constraining system parameters. Whether this holds in case tilted accretion disk warrants further investigation. In paper, we employ ray-tracing algorithm to simulate images Kerr hole illuminated by thin disk, with particular attention relationship between Our findings reveal that an equatorial exhibits minimum size $S_{\textrm{min}} = 13.075$ M$^{2}$, where M...
Abstract Ninety gravitational-wave events have been detected by the LIGO–Virgo–KAGRA network and are released in Gravitational-Wave Transient Catalog. Among these events, 83 cases definitely binary black hole mergers, since masses of all objects involved significantly exceed upper limit neutron stars. The holes merger naturally form two interesting samples, a premerger sample that includes before mergers postmerger consists generated during merging processes. former represents once existed...
The discovery of numerous close-in planets has updated our knowledge planet formation. tidal interaction between and host stars a significant impact on the orbital rotational evolution close planets. Tidal usually takes long time requires reliable numerical methods. manifold correction method, which strictly satisfies integrals dissipative quasiintegrals system, exhibits good accuracy stability in quasi-Kepler problem. Different methods adopt different or integral invariant relations to...
Equations of motion for a general relativistic post-Newtonian Lagrangian approach mainly refer to acceleration equations, i.e. differential equations velocities. They are directly from the Euler-Lagrangian and usually have higher-order terms truncated when they remain at same order Lagrangian. In this sense, incoherent approximately conserve constants in system. paper, we show that can also yield consistency case. The coherent \emph{differential} generalized momenta rather than those...