Xue-Feng Wu
A5087127970- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Astrophysics and Cosmic Phenomena
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Cosmology and Gravitation Theories
- Astronomy and Astrophysical Research
- Astro and Planetary Science
- Dark Matter and Cosmic Phenomena
- Astronomical Observations and Instrumentation
- Noncommutative and Quantum Gravity Theories
- Neutrino Physics Research
- Particle Detector Development and Performance
- Black Holes and Theoretical Physics
- Galaxies: Formation, Evolution, Phenomena
- SAS software applications and methods
- Electronic Packaging and Soldering Technologies
- Radio Astronomy Observations and Technology
- Immune cells in cancer
- Ubiquitin and proteasome pathways
- Geophysics and Gravity Measurements
- Statistical and numerical algorithms
- Protease and Inhibitor Mechanisms
- Solar and Space Plasma Dynamics
- earthquake and tectonic studies
Purple Mountain Observatory
2016-2025
Chinese Academy of Sciences
2010-2025
Nanjing University
2007-2025
University of Science and Technology of China
2017-2025
CCCC Wuhan Harbour Engineering Design and Research (China)
2024
Hefei University of Technology
2022-2024
State Key Laboratory of Plant Genomics
2024
Institute of Microbiology
2024
Beijing Institute of Technology
2023-2024
China Agricultural University
2022-2024
Gamma-ray bursts (GRBs) serve as powerful probes of the early Universe, with their luminous afterglows revealing locations and physical properties star forming galaxies at highest redshifts, potentially locating first generation (Population III) stars. Since GRB have intrinsically very simple spectra, they allow robust redshifts from low signal to noise spectroscopy, or photometry. Here we present a photometric redshift z~9.4 for Swift-detected 090429B based on deep observations...
(Abridged) The two high-redshift gamma-ray bursts, GRB 080913 at z=6.7 and 090423 z=8.3, recently detected by Swift appear as intrinsically short, hard GRBs. They could have been recognized BATSE short/hard GRBs should they occurred z <= 1. We perform a more thorough investigation on physically distinct types (Type I/II) of cosmological their observational characteristics. reiterate the definitions Type I/II review criteria physical motivations. Contrary to traditional approach assigning...
Recent observations support the suggestion that short-duration gamma-ray bursts are produced by compact star mergers. The x-ray flares discovered in two short last much longer than previously proposed postmerger energy-release time scales. Here, we show they can be differentially rotating, millisecond pulsars after mergers of binary neutron stars. differential rotation leads to windup interior poloidal magnetic fields and resulting toroidal strong enough float up break through stellar...
In this review we present a progress report of the connection between long-duration gamma-ray bursts (GRBs) and their accompanying supernovae (SNe). The analysis is from point view an observer, with much emphasis placed on how observations, modelling have constrained what known about GRB-SNe. We discuss photometric spectroscopic properties, role as cosmological probes, including measured luminosity$-$decline relationships, they can be used to measure Hubble constant. statistical bolometric...
Very recently Spitler et al. (2016) and Scholz reported their detections of sixteen additional bright bursts from the direction fast radio burst (FRB) 121102. This repeating FRB is inconsistent with all catastrophic event models put forward previously for hypothetically non-repeating FRBs. Here we propose a different model, in which highly magnetized pulsars travel through asteroid belts other stars. We show that could originate such pulsar encountering lots asteroids belt. During each...
Abstract The recent launch of Einstein Probe (EP) in early 2024 opened up a new window onto the transient X-ray sky, allowing for real-time discovery and follow-up fast transients (FXRTs). Multiwavelength observations FXRTs their counterparts are key to characterize properties outflows and, ultimately, identify progenitors. Here, we report our long-term radio monitoring EP 240315A, long-lasting (∼1000 s) high-redshift ( z = 4.9) FXRT associated gamma-ray burst (GRB) 240315C. Our campaign,...
Abstract The pulse widths of fast radio bursts are always broadened due to the scattering plasma medium through which electromagnetic wave passes. recorded width will be further affected by telescopes since sampling time and bandwidth cannot infinitely small. In this study, we focus on at least 3287 detected from FRB 20121102A as 2023 October. Various effects such broadening, redshift-induced instrumental broadening examined. At a redshift 0.193, is factor approximately 0.16 cosmological...
We report on the detection by Swift of GRB 080913, and subsequent optical/near-infrared follow-up observations GROND, which led to discovery its optical/NIR afterglow recognition high-z nature via a spectral break between i' z' bands. Spectroscopy obtained at ESO-VLT revealed continuum extending down λ = 9400 Å, zero flux for 7500 Å<λ < we interpret as onset Gunn–Peterson trough z 6.695± 0.025 (95.5% confidence level), making 080913 highest-redshift gamma-ray burst (GRB) date, more distant...
We present a systematic analysis of the spectral and temporal properties 17 gamma-ray bursts (GRBs) codetected by Gamma-ray Burst Monitor (GBM) Large Area Telescope (LAT) onboard Fermi satellite in 2010 May. performed time-resolved all bursts, with finest resolution allowed statistics, to reduce smearing different components. found that spectra 14 out GRBs are best modeled classical "Band" function over entire range, which may suggest common origin for emissions detected LAT GBM. GRB 090902B...
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...
In this paper we propose that a fast radio burst (FRB) could originate from the magnetic interaction between double neutron stars (NSs) during their final inspiral within framework of unipolar inductor model. model, an electromotive force is induced on one NS to accelerate electrons ultra-relativistic speed instantaneously. We show coherent curvature radiation these moving along field lines in magnetosphere other responsible for observed FRB signal, is, characteristic emission frequency,...
The accuracy of Einstein's equivalence principle (EEP) can be tested with the observed time delays between correlated particles or photons that are emitted from astronomical sources. Assuming as a lower limit caused mainly by gravitational potential Milky Way, we prove fast radio bursts (FRBs) cosmological origin used to constrain EEP high accuracy. Taking FRB 110220 and two possible FRB/gamma-ray burst (GRB) association systems (FRB/GRB 101011A FRB/GRB 100704A) examples, obtain strict upper...
We continue our systematic statistical study of various components gamma-ray burst (GRB) optical light curves. decompose the early onset bump and late re-brightening with empirical fits analyze their properties. Among 146 GRBs that have well-sampled curves, bumps are observed in 38 26 GRBs, respectively. It is found typical rising decaying slopes for both ∼1.5 ∼ − 1.15, No X-ray band detected to be associated bumps, while an half bumps. The peak luminosity anti-correlated time Both Lp...
If double neutron star mergers leave behind a massive magnetar rather than black hole, bright early afterglow can follow the gravitational wave burst (GWB) even if there is no short gamma-ray (SGRB) - GWB association or an but SGRB does not beam towards earth. Besides directly dissipating proto-magnetar wind as suggested by Zhang, we here suggest that could push ejecta launched during merger process, and under certain conditions, would reach relativistic speed. Such magnetar-powered ejecta,...
Limited by the sensitivities of current gravitational wave (GW) detectors, central remnant binary neutron star (NS) merger associated with GW170817 remains an open question. Considering relatively large total mass, it is generally proposed that would lead to a shortly lived hypermassive NS or directly produce black hole (BH). There no clear evidence support rule out long-lived as remnant. Here we utilize GW and electromagnetic (EM) signals comprehensively investigate parameter space allows...