scholarly journals Influence of stochastic magnetic fields on relativistic electrons

2006 ◽  
Vol 46 (11) ◽  
pp. 941-952 ◽  
Author(s):  
A Wingen ◽  
S.S Abdullaev ◽  
K.H Finken ◽  
M Jakubowski ◽  
K.H Spatschek
Keyword(s):  
Magnetic Fields ◽  
Relativistic Electrons ◽  
Stochastic Magnetic Fields

scholarly journals 8.4. Properties of synchrotron emission and magnetic fields in the central region of M31

1998 ◽  
Vol 184 ◽  
pp. 351-352 ◽  
Author(s):  
P. Hoernes ◽  
R. Beck ◽  
E.M. Berkhuijsen
Keyword(s):  
Magnetic Field ◽  
Magnetic Fields ◽  
Spectral Index ◽  
Central Region ◽  
Relativistic Electrons ◽  
Synchrotron Emission ◽  
The Magnetic Field

At the centre of M31 the nonthermal spectral index between λ20 cm and λ6 cm is −0.2. It slowly decreases along the southern arm and the northern filaments visible in Hα, but perpendicular to these features it increases much faster. The magnetic field runs along the arm and the filaments. These phenomena suggest the existence of a mono-energetic source of relativistic electrons in the nucleus.

Transport in sheared stochastic magnetic fields

1997 ◽  
Vol 4 (2) ◽  
pp. 270-276 ◽  
Author(s):  
E. Vanden Eijnden ◽  
R. Balescu
Keyword(s):  
Magnetic Fields ◽  
Stochastic Magnetic Fields

Electron transport studies in stochastic magnetic fields on the Compact Auburn Torsatron

1995 ◽  
Vol 2 (6) ◽  
pp. 2026-2032 ◽  
Author(s):  
H. Lin ◽  
R. F. Gandy ◽  
S. F. Knowlton ◽  
G. J. Hartwell ◽  
D. Prichard ◽  
...  
Keyword(s):  
Electron Transport ◽  
Magnetic Fields ◽  
Transport Studies ◽  
Stochastic Magnetic Fields

Outstanding Stellar Microwave Flares in 1986

1987 ◽  
Vol 7 (1) ◽  
pp. 55-59 ◽  
Author(s):  
O. B. Slee ◽  
G. J. Nelson ◽  
R. T. Stewart ◽  
Alan E. Wright ◽  
David L. Jauncey ◽  
...  
Keyword(s):  
Magnetic Fields ◽  
Main Sequence ◽  
Relativistic Electrons ◽  
Spectral Indices ◽  
Frequency Range ◽  
High Brightness ◽  
Brightness Temperatures ◽  
Simultaneous Measurements ◽  
Gyrosynchrotron Emission ◽  
Large Frequency

AbstractWe describe bright microwave events that were first detected with the Parkes 64-m telescope at 8.4 or 22 GHz from six active-chromosphere stars. In some flares spectral data were obtained over a large frequency range from simultaneous measurements with the Parkes reflector (8.4 or 22 GHz), the Tidbinbilla interferometer (8.4 and 2.29 GHz), the Fleurs synthesis telescope (1.42 GHz) and the Molonglo Observatory synthesis telescope (0.843 GHz). Data on circular polarization were obtained from the Parkes observations at 8.4 GHz.The stars were in a wide variety of evolutionary states, ranging from a single pre-main-sequence star (HD 36705), two RS CVn binaries (HD 127535, HD 128171), an Algol (HD 132742) and two apparently single K giants (HD 32918 and HD 196818). Their high brightness temperatures, positive spectral indices and low polarization are consistent with optically thick gyrosynchrotron emission from mildly relativistic electrons with average energies 0.5 to 3 MeV gyrating in inhomogeneous magnetic fields of 5 to 100 G.

Nonlinear Magneto-Electric Response Characteristics of Giant Mag-Netostrictive-Piezoelectric Composite Sensors in Harmonic and Stochastic Excitation

2015 ◽  
Vol 764-765 ◽  
pp. 1339-1343
Author(s):  
Jia Xu ◽  
Chang Yi Hong ◽  
Zhi Wen Zhu
Keyword(s):  
Magnetic Fields ◽  
Piezoelectric Composite ◽  
Electric Response ◽  
Stochastic Excitation ◽  
Nonlinear Dynamic Model ◽  
Van Der Pol ◽  
Response Characteristics ◽  
Giant Magnetostrictive Material ◽  
Jump Phenomena ◽  
Stochastic Magnetic Fields

Nonlinear magneto-electric response characteristics of giant magnetostrictive-piezoelectric composite sensors in harmonic and stochastic magnetic fields were studied in this paper. Van der Pol nonlinear difference items were introduced to interpret the hysteresis phenomena of both giant magnetostrictive material and piezoelectric ceramics. The nonlinear dynamic model of giant magnetostrictive-piezoelectric composite sensors in harmonic and stochastic magnetic fields was developed. The expression of dynamic response of the system was obtained, and the bifurcation characteristics of the system were analyzed. The magneto-electric coefficient of the composite sensors was determined, and the effects of system parameters on the dynamic characteristics and magneto-electric coefficient of the system were analyzed. The simulation results show that there are stochastic Hopf bifurcation and jump phenomena of vibration amplitude in the system, and both of that can be avoided through adjusting parameters. The experimental results show that the system’s motion becomes chaotic when stochastic excitation is extremely large. The results of this paper are helpful for optimal design and improvement of giant magnetostrictive-piezoelectric composite sensors.

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