J. K. Deng
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View article: Mitigation Effect of Low-Accumulation Rice Varieties and Soil Conditioners on Hg and Cd Pollution in Rice
Mitigation Effect of Low-Accumulation Rice Varieties and Soil Conditioners on Hg and Cd Pollution in Rice Open
Heavy metal pollution severely affects soil and rice quality in China. In a one-year field experiment conducted in Hg-Cd co-contaminated farmland in Tongren, Guizhou, we examined the effects of low-accumulation rice cultivars, soil amendme…
View article: The Influence of Interlayer on the Development of Steam Chamber in Steam Stimulation during Heavy Oil Recovery
The Influence of Interlayer on the Development of Steam Chamber in Steam Stimulation during Heavy Oil Recovery Open
Cyclic steam stimulation is an effective thermal recovery method for heavy oil recovery. The key potential mechanism is the growth of the steam chamber after steam injection. Taking the LD5X heavy oil reservoir as an example, besides the i…
View article: Two Complete Spectral Transitions of Swift J0243.6+6124 Observed by Insight-HXMT
Two Complete Spectral Transitions of Swift J0243.6+6124 Observed by Insight-HXMT Open
We performed the broadband (1–100 keV) spectral analysis of the first Galactic Be ultraluminous X-ray pulsar (BeULX) Swift J0243.6+6124 observed by Insight-HXMT during the 2017−2018 outburst. The results show spectral transitions at two ty…
View article: Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity
Insight-HXMT observations of Swift J0243.6+6124: the evolution of RMS pulse fractions at super-Eddington luminosity Open
Based on Insight-HXMT data, we report on the pulse fraction evolution during the 2017–2018 outburst of the newly discovered first Galactic ultraluminous X-ray (ULX) source Swift J0243.6+6124. The pulse fractions of 19 observation pairs sel…
View article: Insight-HXMT Firm Detection of the Highest-energy Fundamental Cyclotron Resonance Scattering Feature in the Spectrum of GRO J1008-57
Insight-HXMT Firm Detection of the Highest-energy Fundamental Cyclotron Resonance Scattering Feature in the Spectrum of GRO J1008-57 Open
We report on the observation of the accreting pulsar GRO J1008-57 performed by Insight-Hard X-ray Modulation Telescope (HXMT) at the peak of the source’s 2017 outburst. Pulsations are detected with a spin period of 93.283(1) s. The pulse p…
View article: Discovery of Delayed Spin-up Behavior Following Two Large Glitches in the Crab Pulsar, and the Statistics of Such Processes
Discovery of Delayed Spin-up Behavior Following Two Large Glitches in the Crab Pulsar, and the Statistics of Such Processes Open
Glitches correspond to sudden jumps of rotation frequency ( ν ) and its derivative ( ) of pulsars, the origin of which remains not well understood yet, partly because the jump processes of most glitches are not well time-resolved. There ar…
View article: Switches between accretion structures during flares in 4U 1901+03
Switches between accretion structures during flares in 4U 1901+03 Open
We report on our analysis of the 2019 outburst of the X-ray accreting pulsar 4U 1901+03 observed with Insight-HXMT and NICER. Both spectra and pulse profiles evolve significantly in the decaying phase of the outburst. Dozens of flares are …
View article: Joint Analysis of Energy and RMS Spectra from MAXI J1535-571 with Insight-HXMT
Joint Analysis of Energy and RMS Spectra from MAXI J1535-571 with Insight-HXMT Open
A new black hole X-ray binary (BHXRB) MAXI J1535-571 was discovered by MAXI during its outburst in 2017. Using observations taken by the first Chinese X-ray satellite, the Hard X-ray Modulation Telescope (dubbed as Insight-HXMT), we perfor…
View article: Hot disk of the Swift J0243.6+6124 revealed by Insight-HXMT
Hot disk of the Swift J0243.6+6124 revealed by Insight-HXMT Open
We report on analysis of observations of the bright transient X-ray pulsar Swift J0243.6+6124 obtained during its 2017-2018 giant outburst with Insight-HXMT, NuSTAR, and Swift observatories. We focus on the discovery of a sharp state trans…
View article: Insight-HXMT observation on 4U~1608--52: evolving spectral properties of a bright type-I X-ray burst
Insight-HXMT observation on 4U~1608--52: evolving spectral properties of a bright type-I X-ray burst Open
The evidences for the influence of thermonuclear (type-I) X-ray bursts upon the surrounding environments in neutron star low-mass X-ray binaries (LMXB) were detected previously via spectral and timing analyses. Benefitting from a broad ene…
View article: $Insight$-HXMT study of the timing properties of Sco X-1
$Insight$-HXMT study of the timing properties of Sco X-1 Open
We present a detailed timing study of the brightest persistent X-ray source Sco X-1 using the data collected by the Hard X-ray Modulation Telescope ($Insight$-HXMT) from July 2017 to August 2018. A complete $Z$-track hardness-intensity dia…
View article: Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT
Timing analysis of 2S 1417-624 observed with NICER and Insight-HXMT Open
We present a study of timing properties of the accreting pulsar 2S 1417-624 observed during its 2018 outburst, based on Swift/BAT, Fermi/GBM, Insight-HXMT and NICER observations. We report a dramatic change of the pulse profiles with lumin…
View article: Constant cyclotron line energy in Hercules X–1 - Joint Insight-HXMT and NuSTAR observations
Constant cyclotron line energy in Hercules X–1 - Joint Insight-HXMT and NuSTAR observations Open
The long-term evolution of the centroid energy of the CRSF in Her X-1 is still a mystery. We report a new measurement from a campaign between Insight-HXMT and NuSTAR performed in February 2018. Generally, the two satellites show well consi…
View article: Insight-HXMT Observations of 4U 1636-536: Corona Cooling Revealed with Single Short Type-I X-Ray Burst
Insight-HXMT Observations of 4U 1636-536: Corona Cooling Revealed with Single Short Type-I X-Ray Burst Open
Corona cooling was detected previously from stacking a series of short type I bursts that occurred during the low/hard state of an atoll outburst. Type I bursts are hence regarded as sharp probes used to better our understanding of the bas…