A5051365005- Gamma-ray bursts and supernovae
- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Stellar, planetary, and galactic studies
- Astrophysics and Cosmic Phenomena
- Astro and Planetary Science
- Astronomy and Astrophysical Research
- Astronomical Observations and Instrumentation
- High-pressure geophysics and materials
- Semantic Web and Ontologies
- Thermochemical Biomass Conversion Processes
- Semiconductor materials and interfaces
- Silicon Carbide Semiconductor Technologies
- Topic Modeling
- Geophysics and Gravity Measurements
- Bayesian Modeling and Causal Inference
- SAS software applications and methods
- Adaptive optics and wavefront sensing
- Coal Combustion and Slurry Processing
- Data Quality and Management
- Pharmacogenetics and Drug Metabolism
- Machine Learning and Algorithms
- Reproductive Biology and Fertility
- Semiconductor materials and devices
- Renal and related cancers
Purple Mountain Observatory
2016-2025
Chinese Academy of Sciences
2016-2025
University of Science and Technology of China
2017-2025
Second Hospital of Shandong University
2024-2025
Fudan University
2023-2025
Shanxi University
2023-2024
Institute of Microelectronics
2011-2023
University of Chinese Academy of Sciences
2023
Beijing VDJBio (China)
2023
Zhongshan Hospital
2023
Abstract Long-duration (>2 s) γ-ray bursts that are believed to originate from the death of massive stars expected be accompanied by supernovae. GRB 060614, lasted 102 s, lacks a supernova-like emission down very stringent limits and its physical origin is still debated. Here we report discovery near-infrared bump significantly above regular decaying afterglow. This red inconsistent with even weakest known supernova. However, it can arise Li-Paczyński macronova—the radioactive decay...
Abstract GRB 050709 was the first short Gamma-ray Burst (sGRB) with an identified optical counterpart. Here we report a reanalysis of publicly available data this event and discovery Li-Paczynski macronova/kilonova that dominates optical/infrared signal at t >2.5 days. Such would arise from 0.05 "Equation missing" r-process material launched by compact binary merger. The implied mass ejection supports suggestion mergers are significant possibly main sites heavy nucleosynthesis....
The {\it Swift}-detected GRB 060614 was a unique burst that straddles an imaginary divide between long- and short-duration gamma-ray bursts (GRBs), its physical origin has been heavily debated over the years. Recently, distinct very-soft F814W-band excess at $t\sim 13.6$ days after identified in joint-analysis of VLT HST optical afterglow data GRB~060614, which interpreted as evidence for accompanying Li-Paczynski macronova (also called kilonova). Under assumption time interval $1.7-3.0$ are...
The jet breaks in the afterglow lightcurves of short gamma-ray bursts (SGRBs), rarely detected so far, are crucial for estimating half-opening angles ejecta ($\theta_{\rm j}$) and hence neutron star merger rate. In this work we report detection decline behaviors GRB 150424A 160821B find $\theta_{\rm j}\sim 0.1$ rad. Together with five events reported before 2015 other three "identified" recently (GRB 050709, 060614 140903A), have a sample consisting nine SGRBs one long-short reasonably...
In this paper, we compute rest-frame extinctions for the afterglows of a sample Swift gamma-ray bursts (GRBs) complete in redshift. The selection criteria are based on observational high-energy parameters prompt emission and therefore our should not be biased against dusty sight-lines. It is expected that inferences hold general population GRBs. Our main result optical/near-infrared extinction GRB does follow single distribution. 87 per cent events absorbed by less than 2 mag, 50 suffer from...
The historic first joint detection of both gravitational wave and electromagnetic emission from a binary neutron star merger cemented the association between short gamma-ray bursts (SGRBs) compact object mergers, as well providing sampled multi-wavelength light curve radioactive kilonova (KN) for time. Here we compare optical near-infrared curves this KN, AT2017gfo, to counterparts sample nearby (z < 0.5) SGRBs characterize their diversity in terms brightness distribution. Although at...
We show that the peculiar early optical and in particular X-ray afterglow emission of short duration burst GRB 130603B can be explained by continuous energy injection into blastwave from a supra-massive magnetar central engine. The observed energetics temporal/spectral properties late infrared bump (i.e., "kilonova") are also found consistent with ejecta launched during an NS-NS merger powered isotropic-equivalent kinetic energies both kilonova about $E_{\rm k}\sim 10^{51}$ erg, being...
On 17 August 2017, a gravitational wave event (GW170817) and an associated short gamma-ray burst (GRB 170817A) from binary neutron star merger had been detected. The followup optical/infrared observations also identified the macronova/kilonova emission (AT2017gfo). In this work we discuss some implications of remarkable GW170817/GRB 170817A/AT2017gfo association. We show that $\sim 1.7$s time delay between (GW) GRB signals imposes very tight constraint on superluminal movement waves (i.e.,...
GW190425 is the second neutron star merger event detected by Advanced LIGO/Virgo detectors. If interpreted as a double merger, total gravitational mass substantially larger than that of binary systems identified in Galaxy. In this work we analyze gravitational-wave data within star$-$black hole scenario. For black hole, yield $2.40^{+0.36}_{-0.32}M_\odot$ and an aligned spin $0.141^{+0.067}_{-0.064}$. As for find $1.15^{+0.15}_{-0.13}M_\odot$ dimensionless tidal deformability...
The multi-messenger data of neutron star merger events are promising for constraining the Hubble constant. So far, GW170817 is still unique gravitational wave event with multi-wavelength electromagnetic counterparts. In particular, its radio and X-ray emission have been measured in past $\sim 3-5$ years. this work, we fit long-lasting X-ray, optical, afterglow light curves GW170817/GRB 170817A, including forward shock radiation from both decelerating relativistic GRB outflow sub-relativistic...
Assuming that the differential rotation of massive neutron star (NS) formed in double NS (DNS) mergers has been effectively terminated by magnetic braking and a uniform subsequently established (i.e., supramassive is formed), we analytically derive this work an approximated expression for critical total gravitational mass (${M}_{\mathrm{tot},\mathrm{c}}$) to form (SMNS) DNS mergers, benefited from some equation state (EoS) insensitive relationships. The maximum nonrotating NSs...
In this paper we report the results of first ~four years spectroscopic and photometric monitoring Type IIn supernova SN 2015da (also known as PSN J13522411+3941286, or iPTF16tu). The exploded in nearby spiral galaxy NGC 5337 a relatively highly extinguished environment. transient showed prominent narrow Balmer lines emission at all times slow rise to maximum bands. addition, early observations performed by amateur astronomers give very well-constrained explosion epoch. observables are...
We discuss the results of analysis multi-wavelength data for afterglows GRB 081007 and 090424, two bursts detected by Swift. One them, 081007, also shows a spectroscopically confirmed supernova, SN 2008hw, which resembles 1998bw in its absorption features, while maximum magnitude may be fainter, up to 0.7 mag, than observed 1998bw. Bright optical flashes have been both events, allows us derive solid constraints on circumburst-matter density profile. This is particularly interesting case...
A nearby superluminous burst GRB 130427A was simultaneously detected by six γ-ray space telescopes (Swift, the Fermi GLAST Burst Monitor (GBM)/Large Area Telescope, Konus-Wind, SPI-ACS/INTEGRAL, AGILE, and RHESSI) three RAPTOR full-sky persistent monitors. The isotropic energy release is ∼1054 erg, rendering it most powerful explosion among gamma-ray bursts (GRBs) with a redshift z ⩽ 0.5. emission above 100 MeV lasted about one day, four photons are at energies greater than 40 GeV. We show...
Context. Gravitational wave (GW) astronomy has rapidly reached maturity, becoming a fundamental observing window for modern astrophysics. The coalescences of few tens black hole (BH) binaries have been detected, while the number events possibly including neutron star (NS) is still limited to few. On 2019 August 14, LIGO and Virgo interferometers detected high-significance event labelled S190814bv. A preliminary analysis GW data suggests that was likely due merger compact binary system formed...
We present a detailed analysis of the long-duration GRB 241030A detected by {\it Swift}. Thanks to rapid response XRT and UVOT, strongest part prompt emission has been well measured simultaneously from optical hard X-ray band. The time-resolved WHITE band shows strong variability, largely tracing activity gamma-ray emission, may be produced internal shocks too. joint BAT data reveals presence thermal component with temperature few keV, which can interpreted as photosphere radiation, upper...
Alzheimer's disease (AD) is one of the most common forms dementia in elderly, characterized by progressive neurodegeneration. While exact etiology AD remains unclear, immune inflammation known to play a significant role disease. This study utilized two-sample Mendelian randomization (MR) approach assess causal relationship between different types cells and AD, while considering inflammatory factors as intermediate variables. Data were collected from three sources: cell data (731 phenotypes),...
The ultraviolet/optical telescope (UVOT) onboard the Neil Gehrels Swift Observatory is capable of imaging with 7 lenticular filters and taking slitless spectra 2 grisms. Both image grism data have been widely used to study gamma-ray bursts, supernovae other transients, proved UVOT a powerful instrument in time-domain astronomy. However, second order contamination, for blue sources, strongly limits red end ultraviolet (UV) spectra. This, turn, reduces valid wavelength range only about 33%...
<title>Abstract</title> Gamma-ray bursts (GRBs), among the most energetic events in universe, are traditionally classified into long-duration GRBs, lasting over two seconds, and short-duration less than seconds<sup>1</sup> . Long GRBs typically associated with collapse of massive stars (Type II), while short arise from merger compact binary objects I) <sup>2–5</sup>. Due to their different origins, they exhibit distinct statistical properties observations, which serve as valuable criteria...