A5101646270- Pulsars and Gravitational Waves Research
- Astrophysical Phenomena and Observations
- Gamma-ray bursts and supernovae
- High-pressure geophysics and materials
- Geophysics and Gravity Measurements
- Astrophysics and Cosmic Phenomena
- GNSS positioning and interference
- Crystallography and Radiation Phenomena
- Inertial Sensor and Navigation
- Earthquake Detection and Analysis
- Advanced Frequency and Time Standards
- Particle Accelerators and Free-Electron Lasers
- BIM and Construction Integration
- Ear and Head Tumors
- Salivary Gland Tumors Diagnosis and Treatment
- Mechanics and Biomechanics Studies
- Sarcoma Diagnosis and Treatment
Air Force Medical University
2025
Anhui Jianzhu University
2018-2023
University of Chinese Academy of Sciences
2017-2020
Institute of High Energy Physics
2016-2020
Chinese Academy of Sciences
2016-2019
China Academy of Space Technology
2017
We present the X-ray timing results of new black hole candidate (BHC) MAXI J1535-571 during its 2017 outburst from Hard Modulation Telescope (\emph{Insight}-HXMT) observations taken September 6 to 23. Following definitions given by \citet{Belloni2010}, we find that source exhibits state transitions Low/Hard (LHS) Intermediate (HIMS) and eventually Soft (SIMS). Quasi-periodic oscillations (QPOs) are found in intermediate states, which suggest different types QPOs. With large effective area...
In this work, we report the in-orbit demonstration of X-ray pulsar navigation with Insight-Hard Modulation Telescope (Insight-HXMT), which was launched on Jun. 15th, 2017. The new method 'Significance Enhancement Pulse-profile Orbit-dynamics' (SEPO) is adopted to determine orbit observations only one pulsar. test, Crab chosen and observed by Insight-HXMT from Aug. 31th Sept. 5th in Using 5-day-long observation data, determined successfully three telescopes onboard - High Energy (HE), Medium...
Background Soft tissue sarcoma (STS) typically originates in the muscles and is associated with a poor prognosis. Undifferentiated pleomorphic (UPS) most commonly diagnosed subtype of STS; however, UPS occurring sinonasal region exceedingly rare lacks effective treatment options. Objective This case report presents patient who experienced disease progression after surgery chemotherapy but showed positive response to combination therapy toripalimab anlotinib. Additionally, it explores...
ABSTRACT Using the archival data from Rossi X-ray Timing Explorer , we study evolution of Crab pulsar’s profile in a time span 11 years. The profiles, as characterized by few parameters, changed slightly, but with high statistical significance these years: separation two peaks increased rate 0.°88 ± 0.°20 per century, flux ratio second pulse to first decreased <?CDATA $(3.64\pm 0.86)\times {10}^{-2}$?> <?MML <mml:math> <mml:mrow> <mml:mo stretchy="true">(</mml:mo> <mml:mn>3.64</mml:mn>...
Abstract We studied the evolution of X-ray and γ -ray spectra Crab pulsar utilizing 11-year observations from Rossi Timing Explorer ( RXTE ) 9-year Fermi Gamma-ray Space Telescope FGST ). By fitting spectrum each observation, we obtained corresponding flux then analyzed long-term (or -ray) luminosities as well their correlations with spin-down power pulsar. The in 5–60 keV by Proportional Counter Array decreases a rate (−2.4 ± 0.4) × 10 −14 erg cm −2 s −1 per day. 15–250 High Energy...
Abstract The recently discovered neutron star transient Swift J0243.6+6124 has been monitored by the Hard X-ray Modulation Telescope . Based on obtained data, we investigate broadband spectrum of source throughout outburst. We estimate flux and search for possible cyclotron line in spectrum. However, no evidence line-like features is found up to 150 keV. In absence any its energy spectrum, magnetic field based observed spin evolution applying two accretion torque models. both cases, get...
Abstract We report on X-ray emission properties of the Crab pulsar (PSR B0531+21) using observations by insight-HXMT during its first year after launch. obtained high signal-to-noise profiles in energy band 11–250 keV. have confirmed an increase flux ratio second peak over main with increasing energy, consistent other missions. The separation two peaks shows no significant trend energy. phase-averaged spectrum, fitted a logpar model, and phase-resolved spectra pulsar, powerlaw different...
Abstract With the 12 year long observations by Fermi-LAT, we discover two pairs of spin-down state transitions PSR J1124–5916, making it second young pulsar detected to have such behaviors. J1124–5916 shows mainly states according its rate evolution, normal and low state. In about 80% observation time, is in state, which decreases linearly gives a braking index 1.98 ± 0.04. The are MJD 55183–55803 56114–56398, respectively, with fractional amplitudes both ∼0.4%. No significant difference...
The comprehensive positioning navigation timing (PNT) system in China is a multi-source information fusion with BeiDou satellite (BDS) as core. high-precision millisecond pulsar can enhance the long-term stability of BDS time benchmark and maintain space-time for future deep-space users. In this paper, ground-based service proposed detecting improving BDS. preliminary designs functions are outlined. At same time, method establishing space studied. ground radio data from international array...
In Dec. 2011 PSR B0540-69 experienced a spin-down rate transition (SRT), after which the power of pulsar increased by ~36%. About 1000 days SRT, X-ray luminosity associated wind nebula (PWN) was found to brighten 32+/-8%. After braking index n changes from n=2.12 n=0.03 and then keeps this value for about five years before rising n=0.9 in following years. We find that most current models have difficulties explaining measured index. One exceptive model evolution is increasing dipole magnetic...
Abstract We compare the X-ray profiles and fluxes of Crab pulsar before after glitches in 2017 2019, using data collected by Insight-HXMT, NICER, Fermi/GBM, to test whether there is any evidence for magnetosphere rearrangement glitch. For glitch, from Insight-HXMT (27–200 keV) NICER (0.5–10 remain unchanged within rms 0.47% 0.28%, respectively, while pulsed measured these two detectors stable with 1 σ uncertainty 0.07% 0.011%. Considering that persistent offset spin-down rate post-glitch...
We study the X-ray phases of Crab pulsar utilizing 11-year observations from Rossi Timing Explorer, 6-year radio Nanshan Telescope, and ephemeris Jodrell Bank Observatory. It is found that in different energy bands Telescope show similar behaviors, including long-time evolution short-time variations. Such strong correlations between imply timing noises are both generated spin cannot be well described by monthly observatory. When using as references to noise, it has a significantly smaller...
We investigated the power density spectrum (PDS) and time lag of ultraluminous X-ray sources (ULXs) observed by XMM-Newton. determined PDSs for each ULX found that five them show intrinsic variability due to obvious quasi-periodic oscillations (QPOs) mHz–1 Hz, consistent with previous reports. further these ULXs determine their possible lag. The QPOs exhibit a soft is linearly related QPO frequency. discuss likelihood being type-C analogs, models. might harbor intermediate-mass black holes...
We analyze the energy dependence of X-ray pulse profile and phase-resolved spectra (PRS) Crab pulsar using observations from Neutron star Interior Composition Explorer (NICER) Hard Modulation Telescope (Insight-HXMT). parameterize profiles quantify evolution these parameters in broad band 0.4-250 keV. A log-parabola function is used to fit PRS 2-250 keV, curvature spectrum, i.e., photon index with energy, as represented by parameter \{beta} model, also changes phase. The relation phase has...
We present the observational results from a detailed timing analysis of black hole candidate Swift J1658.2-4242 during its 2018 outburst with observations Hard X-ray Modulation Telescope (Insight-HXMT), Neutron Star Interior Composition Explorer (NICER) and AstroSat in 0.1-250keV. The evolution intensity, hardness integrated fractional root mean square (rms) observed by Insight-HXMT NICER are presented this paper. Type-C quasi-periodic oscillations (QPOs) (0.8-3.5Hz) (1-1.6Hz) also reported...
Abstract We analyze the time and energy dependence of Vela pulsar’s pulse profile using 13 yr observations from Large Area Telescope on Fermi Gamma-ray Space Telescope. It is found that pulsar in γ -ray changes with time. parameterize find different shape parameters show fluctuations rather than gradual However, these variation trends are insignificant due to limited statistics. The displays clear -ray. Different accurately obtained or updated, especially phase separations among pulses....