A5081743530- Gamma-ray bursts and supernovae
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Quantum Chromodynamics and Particle Interactions
- High-Energy Particle Collisions Research
- Dark Matter and Cosmic Phenomena
- Pulsars and Gravitational Waves Research
- Neutrino Physics Research
- Astrophysical Phenomena and Observations
- Particle Detector Development and Performance
- Astronomy and Astrophysical Research
- Stellar, planetary, and galactic studies
- Astro and Planetary Science
- Radio Astronomy Observations and Technology
- Radiation Detection and Scintillator Technologies
- Noncommutative and Quantum Gravity Theories
- Black Holes and Theoretical Physics
- Cosmology and Gravitation Theories
- Particle Accelerators and Free-Electron Lasers
- Geophysics and Gravity Measurements
- Calibration and Measurement Techniques
- Chemistry and Chemical Engineering
- Radiation Therapy and Dosimetry
- Lightning and Electromagnetic Phenomena
- CO2 Reduction Techniques and Catalysts
Hebei Normal University
2016-2025
University of Chinese Academy of Sciences
2022-2025
Inner Mongolia Agricultural University
2025
Henan University
2023-2025
Institute of High Energy Physics
2022-2024
Southwest Jiaotong University
2020-2023
Xinyang Normal University
2023
University of Hawaiʻi at Mānoa
2023
University of Hawaii System
2023
Kurchatov Institute
2023
Double neutron star (DNS) merger events are promosing candidates of short Gamma-ray Burst (sGRB) progenitors as well high-frequecy gravitational wave (GW) emitters. On August 17, 2017, such a coinciding event was detected by both the LIGO-Virgo detector network GW170817 and Gamma-Ray Monitor on board NASA's {\it Fermi} Space Telescope GRB 170817A. Here we show that fluence spectral peak energy this sGRB fall into lower portion distributions known sGRBs. Its isotropic luminosity is abnormally...
The brightest Gamma-ray burst, GRB 221009A, has spurred numerous theoretical investigations, with particular attention paid to the origins of ultra-high energy TeV photons during prompt phase. However, analyzing mechanism radiation in $\sim$MeV range been difficult because high flux causes pile-up and saturation effects most detectors. In this letter, we present systematic modeling time-resolved spectra using unsaturated data obtained from Fermi/GBM (precursor) SATech-01/GECAM-C (main...
Although metabolomics is widely used to assess the detrimental effects of antibiotics and characterize stress response, relationships between metabolites biological endpoints following remain unknown. In our study, we exposed ryegrass seeds sulfamethoxazole for five days. The results showed that inhibited plant growth (by 12.90–85.83%). It also decreased chlorophyll content 35.40–93.32%), carotenoid 32.76–90.18%), root cell permeability 98.43–99.29%), but increased reactive oxygen species...
We perform a statistical analysis of the temporal and spectral properties latest Fermi gamma-ray bursts (GRBs) to revisit classification GRBs. find that bimodalities duration energy ratio ($E_{\mathrm{peak}}$/Fluence) anti-correlation between hardness (hardness ($HR$), peak index) ($T_{90}$) support long/soft $-$ short/hard scheme for The $HR - T_{90}$ strongly depends upon shape GRBs bands, with curved spectra in typical BATSE bands show tighter than those power-law BAT bands. This might...
Abstract Possible violations of Lorentz invariance (LIV) have been investigated for a long time using the observed spectral lags gamma-ray bursts (GRBs). However, these generally relied on single photon in highest energy range. Furthermore, search LIV has hindered by our ignorance concerning intrinsic lag different bands. GRB 160625B, only burst so far with well-defined transition from positive to negative provides unique opportunity put new constraints LIV. Using multi-photon bands we...
We report the detection of radio afterglow a long gamma-ray burst (GRB) 111005A at 5-345 GHz, including very baseline interferometry observations with positional error 0.2 mas. The position is coincident disk galaxy ESO 580-49 z= 0.01326 (~1" from its center), which makes GRB second closest known to date, after 980425. was an order magnitude less luminous than those local low-luminosity GRBs, and obviously cosmological GRBs. flux approximately constant then experienced unusually rapid decay...
Abstract The giant flares of soft gamma-ray repeaters (SGRs) have long been proposed to contribute at least a subsample the observed short bursts (GRBs). In this paper, we perform comprehensive analysis high-energy data recent bright GRB 200415A, which was located close Sculptor galaxy. Our results suggest that magnetar flare provides most natural explanation for observational properties including its location, temporal and spectral features, energy, statistical correlations, emissions. On...
The afterglows of gamma-ray bursts (GRBs) have commonly been assumed to be due shocks sweeping up the circum-stellar medium. However, most GRBs found in dense star-forming regions where a significant fraction prompt X-ray emission can scattered by dust grains. Here we revisit behavior scattering X-rays GRBs. We find that features some from minutes days after triggers are consistent with off host This implies observed (especially those without sharp rising and decaying flares) could...
Abstract We carry out a systematical study of the spectral lag properties 50 single-pulsed gamma-ray bursts (GRBs) detected by Fermi Gamma-Ray Burst Monitor. By dividing light curves into multiple consecutive energy channels, we provide new measurement that is independent channel selections. perform detailed statistical our measurements. find two similar power-law dependencies both pulse arrival time and width. Our results on indices would favor relativistic geometric effects for origin lag....
Soil degradation caused by mining activities has seriously affected the ecological environment of areas. Improving soil quality is key to solving this problem. This study examined impact adding Effective Microorganism (EM) agents and maize straw from dump Ordos Rongheng open-pit coal mine. We conducted a two-factor complete experiment, varying amounts EM (0 g·kg−1, 0.1 0.2 0.3 0.4 g·kg−1) 5 10 15 20 g·kg−1). Changes in soil’s physical, chemical, biological properties were assessed using...
Large-scale coal mine dumps are formed during the mining process of resources. These comprise impoverished soil, posing significant challenges for vegetation restoration. To address this problem, soil microbial (EM) agents and fly ash have effectively improved quality. However, effects different application ratios on quality sandy in still unclear. This study aims to explore applicable ratio dumps. employed a field-based potted experiment design. A two-factor complete factorial experimental...
Metabolomics is a commonly used method to study the responses of organisms environmental changes. However, relationships between metabolites and biological endpoints still need further discussion. In this study, we exposed wheat seeds sulfamethoxazole (0, 1, 10, 100 mg/L) for 5 days. The results show that (SMX) had an inhibitory effect on growth. It reduced shoot length, root fresh weight, chlorophyll content, carotenoid content. At same time, it increased concentration reactive oxygen...
The spectrum of gamma-ray burst (GRB) afterglows can be studied with color indices. Here, we present a large comprehensive catalog 70 GRBs multiwavelength optical transient data on which perform systematic study to find the temporal evolution We categorize them into two samples based how well indices are evaluated. Golden sample includes 25 bursts mostly observed by GROND, and Silver 45 other telescopes. For sample, that 96% do not vary over time. However, during short periods in most...
Abstract We performed a systematic search for X-ray bursts of the SGR J1935+2154 using Fermi Gamma-ray Burst Monitor continuous data dated from 2013 January to 2021 October. Eight bursting phases, which consist total 353 individual bursts, are identified. further analyze periodic properties our sample Lomb–Scargle periodogram. The result suggests that those exhibit period ∼238 days with ∼63.2% duty cycle. Based on analysis, we predict two upcoming active windows bursts. Since July, beginning...
The prompt localization of GRB 050525A by Swift allowed rapid follow-up the afterglow. observations revealed that optical afterglow had a major rebrightening starting at ~0.01 days and ending ~0.03 days, which was followed an initial power-law decay. Here we show this early emission feature can be interpreted as reverse-shock superposed forward-shock in interstellar medium environment. By fitting observed data, further constrain some parameters standard fireball-shock model: Lorentz factor...
Violations of Lorentz invariance can lead to an energy-dependent vacuum dispersion light, which results in arrival-time differences photons arising with different energies from a given transient source. In this work, direction-dependent constraints are obtained on nonbirefringent Lorentz-violating effects, using the observed spectral lags gamma-ray burst GRB 160625B. This has unusually large high-energy photon statistics, so we obtain true time bunches rather than rough lag single...
In an effort to understand the puzzle of classifying gamma-ray bursts (GRBs), we perform a systematic study Swift GRBs and investigate several short GRB issues. Though have (≲ 2 s) prompt duration as monitored by Burst Alert Telescope, composite light curves including both afterglow emission suggest that most similar radiative feature long GRBs. Furthermore, some well-studied might also intrinsically duration, which renders them type imposters. Genuine detected be rare, so determining...
The ejecta composition is an open question in gamma-ray bursts (GRB) physics. Some GRBs possess a quasi-thermal spectral component the time-resolved analysis, suggesting hot fireball origin. Others show featureless non-thermal spectrum known as "Band" function, consistent with synchrotron radiation origin and that jet Poynting-flux-dominated at central engine likely emission region well. There are also showing sub-dominant thermal dominant hybrid composition. Here we report extraordinarily...