A5042890249- Pulsars and Gravitational Waves Research
- Gamma-ray bursts and supernovae
- Astrophysical Phenomena and Observations
- Radio Astronomy Observations and Technology
- Geophysics and Gravity Measurements
- Astrophysics and Cosmic Phenomena
- Stellar, planetary, and galactic studies
- Astronomical Observations and Instrumentation
- Statistical and numerical algorithms
- High-pressure geophysics and materials
- GNSS positioning and interference
- Traumatic Brain Injury and Neurovascular Disturbances
- Superconducting and THz Device Technology
- Advanced Photonic Communication Systems
- Protein Hydrolysis and Bioactive Peptides
- S100 Proteins and Annexins
- Electromagnetic Compatibility and Measurements
- Polyoxometalates: Synthesis and Applications
- Head and Neck Surgical Oncology
- Dyeing and Modifying Textile Fibers
- Advanced Frequency and Time Standards
- Spectroscopy and Chemometric Analyses
- Speech Recognition and Synthesis
- Neuroblastoma Research and Treatments
- Natural Language Processing Techniques
Max Planck Institute for Radio Astronomy
2021-2025
Hebei Medical University
2024-2025
Second Hospital of Hebei Medical University
2024-2025
China Automotive Technology and Research Center
2024
Xi'an Polytechnic University
2024
Guangxi University
2023
Robert Bosch (Germany)
2023
Kavli Institute for Theoretical Sciences
2018-2021
Peking University
2017-2021
University of Nevada, Las Vegas
2019
Abstract Discovery of pulsars is one the main goals for large radio telescopes. The Five-hundred-meter Aperture Spherical Telescope (FAST), that incorporates an L-band 19-beam receiver with a system temperature about 20 K, most sensitive telescope utilized discovering pulsars. We designed snapshot observation mode FAST key science project, Galactic Plane Pulsar Snapshot (GPPS) survey, in which every four nearby pointings can observe cover sky patch 0.1575 square degrees through...
Among the compact objects observed in gravitational wave merger events a few have masses gap between most massive neutron stars (NSs) and least black holes (BHs) known. Their nature formation of their merging binaries are not well understood. We report on pulsar timing observations using Karoo Array Telescope (MeerKAT) PSR J0514-4002E, an eccentric binary millisecond globular cluster NGC 1851 with total mass $3.887 \pm 0.004$ solar masses. The companion to is object its (between $2.09$...
The luminosity function of Fast Radio Bursts (FRBs), defined as the event rate per unit cosmic co-moving volume luminosity, may help to reveal possible origins FRBs and design optimal searching strategy. With Bayesian modelling, we measure FRB using 46 known FRBs. Our framework self-consistently models selection effects, including survey sensitivity, telescope beam response, electron distributions from Milky Way / host galaxy local environment Different previous companion paper, pay...
The megajansky radio burst, FRB 20200428, and other bright bursts detected from the Galactic source SGR J1935+2154 suggest that magnetars can make fast (FRBs), but emission site mechanism of FRB-like are still unidentified. Here, we report emergence a pulsar phase magnetar 5 months after 20200428. Pulses were in 16.5 hours over 13 days using Five-hundred-meter Aperture Spherical Telescope, with luminosities about eight decades fainter than pulses emitted narrow window anti-aligned x-ray...
Galactic plane radio surveys play a key role in improving our understanding of wide range astrophysical phenomena. Performing such survey using the latest interferometric telescopes produces large data rates necessitating shift towards fully or quasi-real-time analysis with being stored for only time required to process them. We present here overview and setup 3000 hour Max-Planck-Institut fuer Radioastronomie (MPIfR) MeerKAT Plane (MMGPS). The is unique by operating commensal mode,...
Long-period radio transients are an emerging class of extreme astrophysical events which only three known. These objects emit highly polarised, coherent pulses typically a few tens seconds duration and minutes to hour-long periods. While magnetic white dwarfs magnetars, either isolated or in binary systems, have been invoked explain these objects, consensus has not emerged. Here we report on the discovery ASKAP J193505.1+214841.0 (henceforth ASKAPJ1935+2148) with period 53.8 exhibiting...
Context. Radio interferometers composed of a large array small antennas possess fields view, coupled with high sensitivities. For example, the Karoo Array Telescope (MeerKAT) achieves gain up to 2.8 KJy −1 across its >1 deg 2 field view. This capability significantly enhances survey speed for pulsars and fast transients. It also introduces challenges related data rate, which reaches few Tb s MeerKAT, it requires substantial computing power. Aims. To handle rate surveys, we have developed...
Long-period radio transients are a new class of astrophysical objects that exhibit periodic emission on timescales tens minutes. Their true nature remains unknown; possibilities include magnetic white dwarfs, binary systems, or long-period magnetars; the latter is predicted to produce fast bursts (FRBs). Using MeerKAT telescope, we conducted follow-up observations transient GPM J1839-10. Here report source exhibits wide range unusual properties, including polarization characteristics...
We report the discovery of 13 new pulsars in globular cluster NGC 1851 by TRAPUM Large Survey Project using MeerKAT radio telescope. The discoveries consist six isolated millisecond (MSPs) and seven binary pulsars, which are MSPs one is mildly recycled. For all we present basic kinematic, astrometric, orbital parameters, where applicable, as well their polarimetric properties, when these measurable. Two (PSR J0514−4002D PSR J0514−4002E) wide extremely eccentric ( e > 0.7) orbits with a...
More than 100 millisecond pulsars (MSPs) have been discovered in radio observations of gamma-ray sources detected by the Fermi Large Area Telescope (LAT), but hundreds pulsar-like remain unidentified. Here we present first results from targeted survey Fermi-LAT being performed Transients and Pulsars with MeerKAT (TRAPUM) Survey Project. We observed 79 identified as possible pulsar candidates a Random Forest classification unassociated 4FGL catalogue. Each source was for 10 minutes on two...
ABSTRACT The most massive globular cluster in our Galaxy, Omega Centauri, is an interesting target for pulsar searches, because of its multiple stellar populations and the intriguing possibility that it was once nucleus a galaxy absorbed into Milky Way. recent discoveries pulsars this their association with known X-ray sources hint that, given large number sources, there much larger undiscovered population. We used superior sensitivity MeerKAT radio telescope to search Centauri. In paper, we...
We report 4 new pulsars discovered in the core-collapsed globular cluster (GC) NGC 6624 by TRAPUM Large Survey Project with MeerKAT telescope. All of found are isolated. PSR J1823$-$3021I and J1823$-$3021K millisecond period respectively 4.319 ms 2.768 ms. J1823$-$3021J is mildly recycled a 20.899 ms, J1823$-$3022 long pulsar 2.497 s. The J1823$-$3021I, J1823$-$3021J, have position dispersion measure (DM) compatible being members GC therefore associated 6624. Pulsar only bright enough to be...
The MPIfR-MeerKAT Galactic Plane survey at L -band (MMGPS-L) is the most sensitive pulsar in Southern Hemisphere, providing 78 discoveries an area of 900 sq. deg. Here, we present a follow-up study one these new discoveries, PSR J1208−5936, 28.71-ms recycled double neutron star system with orbital period P b = 0.632 days and eccentricity e 0.348, merging within Hubble time. Through timing almost year observations, detected relativistic advance periastron ( ω̇ 0.918(1) deg yr −1 ), resulting...
ABSTRACT The sensitivity of the MeerKAT radio interferometer is an opportunity to probe deeper into population rare and faint extragalactic pulsars. TRAPUM (TRAnsients PUlsars with MeerKAT) collaboration has conducted a radio-domain search for accelerated pulsars transients in Small Magellanic Cloud (SMC). This partially targeted survey, performed at L band (856–1712 MHz) core array telescope 2-h integrations, twice as sensitive latest SMC pulsar survey. We report discovery seven new...
PSR J2140$-$2311B is a 13-ms pulsar discovered in 2001 7.8-hour Green Bank Telescope (GBT) observation of the core-collapsed globular cluster M30 and predicted to be highly eccentric binary orbit. This has eluded detection since then, therefore its precise orbital parameters have remained mystery until now. In this work, we present confirmation using observations taken with UHF receivers MeerKAT telescope as part TRAPUM Large Survey Project. Taking advantage beamforming capability our...
Abstract X-ray-dim isolated neutron stars (XDINSs) are characterized by Planckian spectra in X-ray bands, but show optical/ultraviolet (UV) excesses: the factors which measured photometry exceeds those extrapolated from spectra. To solve this problem, a radiative model of bremsstrahlung emission plasma atmosphere is established regime strangeon star. A star could simply be regarded as upper layer normal This atmosphere, formed and maintained interstellar-medium-accreted matter due to...
Context. Pulsar surveys with modern radio telescopes are becoming increasingly computationally demanding. This is particularly true for wide field-of-view pulsar interferometers and those conducted in real or quasi-real time. These demands result data analysis bottlenecks that can limit the parameter space covered by diminish their scientific return. Aims. In this paper we address computational challenge of ‘candidate folding’ searching, presenting a novel, efficient approach designed to...
The disruption of blood-brain barrier (BBB) is associated with poor outcomes TBI patients. Sphingosine-1-phosphate receptor 2 (S1pr2), a member the G protein-coupled family, involved in endothelial activation and regulation vascular integrity. We hypothesized that inhibition S1pr2 may alleviate BBB explored potential underlying molecular mechanisms.
Objective To conduct a retrospective comparative analysis of endoscopic-assisted burr hole craniostomy (EBHC) vs. two (TBHC) in the management septated chronic subdural hematoma (sCSDH). Methods This study employed cohort design, encompassing 87 patients diagnosed with sCSDH who were admitted for EBHC or TBHC between January 2018 and December 2023. Among these patients, 48 underwent EBHC, while 39 received TBHC. The primary outcome measure was recurrence rate within 6 months following...
We present our piggyback search for fast radio bursts using the Nanshan 26m Radio Telescope and Kunming 40m Telescope. The observations are performed in L-band from 1380 MHz to 1700 at S-band 2170 2310 Kunming. built \textsc{Roach2}-based FFT spectrometer developed real-time transient software. introduce a new interference mitigation technique named \emph{zero-DM matched filter} give formula of signal-to-noise ratio loss search. Though we have no positive detection about 1600 2400 hours data...