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Detection of two bright radio bursts from magnetar SGR 1935 + 2154
期刊论文
Nature Astronomy, 2021, 卷号: 5, 页码: 414
作者:
Kirsten, F.
;
Snelders, M. P.
;
Jenkins, M.
;
Nimmo, K.
;
van den Eijnden, J.
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浏览/下载:46/0
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提交时间:2021/11/18
Astrophysics - High Energy Astrophysical Phenomena
Abstract: Fast radio bursts are millisecond-duration, bright radio signals (fluence 0.1-100 Jy ms) emitted from extragalactic sources of unknown physical origin. The recent CHIME/FRB and STARE2 detection of an extremely bright (fluence ~MJy ms) radio burst from the Galactic magnetar SGR 1935+2154 supports the hypothesis that (at least some) fast radio bursts are emitted by magnetars at cosmological distances. In follow-up observations totalling 522.7 h on source, we detect two bright radio bursts with fluences of 112 ± 22 Jy ms and 24 ± 5 Jy ms, respectively. Both bursts appear to be affected by interstellar scattering and we measure significant linear and circular polarization for the fainter burst. The bursts are separated in time by ~1.4 s, suggesting a non-Poissonian, clustered emission processsimilar to those seen in some repeating fast radio bursts. Together with the burst reported by CHIME/FRB and STARE2, as well as a much fainter burst seen by FAST (fluence 60 mJy ms), our observations demonstrate that SGR 1935+2154 can produce bursts with apparent energies spanning roughly seven orders of magnitude, and that the burst rate is comparable across this range. This raises the question of whether these four bursts arise from similar physical processes, and whether the fast radio burst population distribution extends to very low energies (~10
30
erg, isotropic equivalent).
Semiclassical states for Dirac-Klein-Gordon system with critical growth
期刊论文
JOURNAL OF MATHEMATICAL ANALYSIS AND APPLICATIONS, 2020, 卷号: 488, 期号: 2, 页码: 29
作者:
Ding, Yanheng
;
Guo, Qi
;
Yu, Yuanyang
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浏览/下载:27/0
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提交时间:2020/06/30
Dirac-Klein-Gordon system
Least energy solutions
Concentration
Critical
Least energy sign-changing solutions of fractional Kirchhoff–Schrödinger–Poisson system with critical growth
期刊论文
Applied Mathematics Letters, 2020, 卷号: 106
作者:
Wang, Da-Bin
;
Zhang, Jin-Long
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  |  
浏览/下载:4/0
  |  
提交时间:2020/11/14
Mathematical techniques
Critical growth
Energy characteristics
Kirchhoff
Least energy
Poisson system
Sign changing solutions
Variational methods
Existence of least energy nodal solution for Kirchhoff-Schrodinger-Poisson system with potential vanishing
期刊论文
BOUNDARY VALUE PROBLEMS, 2020, 卷号: 2020, 期号: 1
作者:
Zhang, Jin-Long
;
Wang, Da-Bin
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  |  
浏览/下载:13/0
  |  
提交时间:2022/03/01
Potential vanishing
Nehari manifold
Least energy nodal solution
Energy efficiency evaluation and prediction of large-scale chemical plants using partial least squares analysis integrated with Gaussian process models
期刊论文
ENERGY CONVERSION AND MANAGEMENT, 2019, 卷号: 195, 页码: 690-700
作者:
Zhu, Li
;
Chen, Junghui
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浏览/下载:3/0
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提交时间:2019/12/02
Chemical production
Energy efficiency
Evaluation
Gaussian process
Informative data
Partial least squares
Coal consumption prediction model of space heating with feature selection for rural residences in severe cold area in China
期刊论文
SUSTAINABLE CITIES AND SOCIETY, 2019, 卷号: 50
作者:
Yuan, Pengli
;
Lin Duanmu
;
Wang, Zongshan
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  |  
浏览/下载:9/0
  |  
提交时间:2019/12/02
Rural residences
Inner Mongolia
Energy consumption
Space heating
Feature selection
Support vector machine (SVM) model
Sensitivity analysis
Partial least squares regression(PLSR)
Random forest(RF)
On the existence of least energy solutions to a Kirchhoff-type equation in R-3
期刊论文
Applied Mathematics Letters, 2019, 卷号: 96, 页码: 179-186
作者:
Lu, Dengfeng
;
Lu, Zongze*
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  |  
浏览/下载:13/0
  |  
提交时间:2019/12/23
Kirchhoff-type equation
Least energy solution
Perturbation method
Pohozaev type identity
Reconstruction and prediction of flow field fluctuation intensity and flow-induced noise in impeller domain of jet centrifugal pump using gappy pod method
期刊论文
Energies, 2019, 卷号: 12, 期号: 1
作者:
Guo, Rong
;
Li, Rennian
;
Zhang, Renhui
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  |  
浏览/下载:10/0
  |  
提交时间:2020/11/14
Acoustic noise
Centrifugal pumps
Computational geometry
Flow fields
Forecasting
Frequency domain analysis
Hydrodynamics
Impellers
Kinetic energy
Kinetics
Least squares approximations
Singular value decomposition
Thermal noise
Unsteady flow
Blade profile
Centrifugal pump impellers
Field fluctuations
Induced noise
Proper orthogonal decomposition method
Singular value decomposition method
Turbulent kinetic energy
Vibration characteristics
Parameter Identification of the Equivalent Circuit Model of Supercapacitor using Weight Distribution Optimization
期刊论文
Hsi-An Chiao Tung Ta Hsueh/Journal of Xi'an Jiaotong University, 2018, 卷号: 52, 页码: 96-102
作者:
Zhang, Le
;
Xu, Dan
;
Wang, Bin
;
Ma, Guangliang
;
Li, Qiyu
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  |  
浏览/下载:4/0
  |  
提交时间:2019/11/19
Bilinear transformation
Energy storage systems
Equivalent circuit model
Parameter identification methods
Performance optimizations
Recursive least square methods
Recursive least squares method
Weight distributions
Infinitely many solutions and least energy solutions for Klein–Gordon–Maxwell systems with general superlinear nonlinearity
期刊论文
Computers and Mathematics with Applications, 2018, 卷号: 75, 期号: 9, 页码: 3358-3366
作者:
Chen, Sitong
;
Tang, Xianhua*
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  |  
浏览/下载:3/0
  |  
提交时间:2019/12/03
Klein-Gordon-Maxwell system
Sign-changing potential
Infinitely many solutions
Least energy solutions
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