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CAS IR Grid
机构
高能物理研究所 [2]
物理研究所 [1]
金属研究所 [1]
过程工程研究所 [1]
生态环境研究中心 [1]
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OAI收割 [6]
内容类型
期刊论文 [6]
发表日期
2020 [2]
2019 [1]
2018 [1]
2006 [2]
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Platy BaTaO2N Crystals Fabricated from K2CO3-KCl Binary Flux for Photocatalytic H-2 Evolution
期刊论文
OAI收割
ACS APPLIED ENERGY MATERIALS, 2020, 卷号: 3, 期号: 11, 页码: 10669-10675
作者:
Luo, Ying
;
Wang, Zheng
;
Yamada, Tetsuya
;
Yubuta, Kunio
;
Suzuki, Sayaka
  |  
收藏
  |  
浏览/下载:18/0
  |  
提交时间:2021/08/31
binary flux
platy BaTaO2N
lattice match
high crystallinity
H-2 evolution
An underlying clock in the extreme flip-flop state transitions of the black hole transient Swift J1658.2-4242
期刊论文
OAI收割
Astronomy and Astrophysics, 2020, 卷号: 641, 页码: A101
作者:
HXMT
  |  
收藏
  |  
浏览/下载:58/0
  |  
提交时间:2022/02/08
accretion
accretion disks
black hole physics
X-rays: binaries
time
Astrophysics - High Energy Astrophysical Phenomena
Abstract:
Aims: Flip-flops are top-hat-like X-ray flux variations, which have been observed in some transient accreting black hole binary systems, and feature simultaneous changes in the spectral hardness and the power density spectrum (PDS). They occur at a crucial time in the evolution of these systems, when the accretion disc emission starts to dominate over coronal emission. Flip-flops remain a poorly understood phenomenon, so we aim to thoroughly investigate them in a system featuring several such transitions.
Methods: Within the multitude of observations of
Swift J1658.2-4242
during its outburst in early 2018, we detected 15 flip-flops, enabling a detailed analysis of their individual properties and the differences between them. We present observations by XMM-Newton, NuSTAR, Astrosat, Swift, Insight-HXMT, INTEGRAL, and ATCA. We analysed their light curves, searched for periodicities, computed their PDSs, and fitted their X-ray spectra, to investigate the source behaviour during flip-flop transitions and how the interval featuring flip-flops differs from the rest of the outburst.
Results: The flip-flops of Swift J1658.2-4242 are of an extreme variety, exhibiting flux differences of up to 77% within 100 s, which is much larger than what has been seen previously. We observed radical changes in the PDS simultaneous with the sharp flux variations, featuring transitions between the quasi-periodic oscillation types C and A, which have never been observed before. Changes in the PDS are delayed, but more rapid than changes in the light curve. Flip-flops occur in two intervals within the outburst, separated by about two weeks in which these phenomena were not seen. Transitions between the two flip-flop states occurred at random integer multiples of a fundamental period of 2.761 ks in the first interval and 2.61 ks in the second. Spectral analysis reveals the high and low flux flip-flop states to be very similar, but distinct from intervals lacking flip-flops. A change of the inner temperature of the accretion disc is responsible for most of the flux difference in the flip-flops. We also highlight the importance of correcting for the influence of the dust scattering halo on the X-ray spectra.
Constant cyclotron line energy in Hercules X-1 - Joint Insight-HXMT and NuSTAR observations
期刊论文
OAI收割
Journal of High Energy Astrophysics, 2019, 卷号: 23, 页码: 29-32
作者:
HXMT
  |  
收藏
  |  
浏览/下载:50/0
  |  
提交时间:2022/02/08
Stars: neutron star
Pulsars: binary(Her X-1)
X-rays: stars
Astrophysics - High Energy Astrophysical Phenomena
Abstract: 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 consistent results of timing and spectral properties. The joint spectral analysis confirms that the previously observed long decay phase has ended, and that the line energy instead keeps constant around 37.5 keV after flux correction.
Coupling relationship between dephosphorisation and desulphurisation abilities or potentials for CaO-FeO-Fe2O3-Al2O3-P2O5 slags over a large variation range of slag oxidisation ability during secondary refining process of molten steel
期刊论文
OAI收割
IRONMAKING & STEELMAKING, 2018, 卷号: 45, 期号: 1, 页码: 25, 43
作者:
Yang, XM
;
Li, JY
;
Zhang, M
;
Chai, GM
;
Duan, DP
  |  
收藏
  |  
浏览/下载:42/0
  |  
提交时间:2018/12/29
Phosphate capacity
MOLECULE COEXISTENCE THEORY
Sulphide capacity
FETO-(CAO+MGO)-(SIO2+P2O5) PHOSPHATE SLAGS
Phosphorus distribution ratio
CAO-SIO2-MGO-AL2O3 IRONMAKING SLAGS
Sulphur distribution ratio
SULFUR DISTRIBUTION RATIO
Coupling relationship
BINARY-LIQUID ALLOYS
Simultaneous dephosphorisation and desulphurisation
CAO-BASED SLAGS
Secondary refining process
LIME-BASED FLUX
Ion and molecule coexistence theory (IMCT)
SULFIDE CAPACITY
Slag oxidation ability
HOT METAL
PHOSPHORUS DISTRIBUTION
Thermodynamic assessment of the Ag-Ga system
期刊论文
OAI收割
Calphad-Computer Coupling of Phase Diagrams and Thermochemistry, 2006, 卷号: 30, 期号: 3, 页码: 316-322
Y. Zhang
;
J. B. Li
;
J. K. Liang
;
Q. L. Liu
;
Y. G. Xiao
;
Q. Zhang
;
G. H. Rao
;
C. R. Li
收藏
  |  
浏览/下载:22/0
  |  
提交时间:2012/04/14
Ag-Ga system
thermodynamic properties
phase diagram
binary-liquid alloys
silver-gallium
single-crystals
bulk gan
equilibrium diagram
zeta-phases
flux method
growth
copper
gold
Thermodynamic assessment of the Ag-Ga system
期刊论文
OAI收割
CALPHAD-COMPUTER COUPLING OF PHASE DIAGRAMS AND THERMOCHEMISTRY, 2006, 卷号: 30, 期号: 3, 页码: 316
Zhang, Y
;
Li, JB
;
Liang, JK
;
Liu, QL
;
Xiao, YG
;
Zhang, Q
;
Rao, GH
;
Li, CR
收藏
  |  
浏览/下载:35/0
  |  
提交时间:2013/09/23
BINARY-LIQUID ALLOYS
SILVER-GALLIUM
SINGLE-CRYSTALS
BULK GAN
EQUILIBRIUM DIAGRAM
ZETA-PHASES
FLUX METHOD
GROWTH
COPPER
GOLD