搜索结果: 46-60 共查到“理学 solar wind”相关记录62条 . 查询时间(0.135 秒)
Solar wind interaction with the Earth's magnetosphere:the role of reconnection in the presence of a large scale sheared flow
Solar wind interaction Earth's magnetosphere role of reconnection large scale sheared flow
2009/10/30
The Earth's magnetosphere and solar wind environment is a laboratory of excellence for the study of the physics of collisionless magnetic reconnection. At low latitude magnetopause, magnetic reconnect...
Small-scale Alfvènic turbulence in the outer heliosphere is mainly determined by a source which is connected with the instability of the initially highly anisotropic velocity distribution of interstel...
Anisotropic unstable ion distribution functions downstream of the solar wind termination shock
ion plasma state solar wind
2009/5/27
In this paper we demonstrate that solar wind ions, passing over the quasiperpendicular portion of the solar wind MHD termination shock, unavoidably develop strongly pronounced pitchangle anisotropies....
Self-initialised Fermi-1 acceleration by pitch-angle re-scattering of solar wind ions reflected from the parallel termination shock
anomalous cosmic ray process governing pick-up ions solar wind ions
2009/5/27
In a recent kinetic calculation a rather high amount of reflected ions was shown to occur at the solar wind termination shock under a parallel magnetic field orientation. The fate of these reflected i...
Magnetosonic Waveguide Model of Solar Wind Flow Tubes
Solar wind MHD waves magnetic flux tubes
2009/5/7
We consider solar wind flow tubes as a magnetosonic waveguide. Assuming a symmetric expansion in edges of slab-modelled waveguide, we study the propagation characteristics of magnetosonic wave in th...
Geo-effectiveness of Solar Wind Extremes
Geomagnetic storms geomagnetic activity solar wind streams interplanetary magnetic field space weather
2009/5/7
Examples of extreme events of solar wind and their effect on geomagnetic conditions are discussed here. It is found that there are two regimes of high speed solar wind streams with a threshold of ...
Numerical Simulations of Kinetic Alf ´v en Waves to Study Spectral Index in Solar Wind Turbulence and Particle Heating
Kinetic Alfv´ en wave: filamentation solar wind spectral index chaotic structure
2009/5/6
We present numerical simulations of the modified nonlinear
Schr¨odinger equation satisfied by kinetic Alfv´en waves (KAWs) leading
to the formation of magnetic filaments at different times. Th...
The Solar Wind：Our Current Understanding and How We Got Here
Solar wind coronal holes solar corona cyclotron resonance MHD waves
2009/5/6
In the original theory for the solar wind, the electron pressure
gradient was the principal accelerating force. This was soon recognized
to be insufficient to drive the high-speed streams. Subsequen...
Analysis of Ion Charge States in Solar Wind and CMEs
Solar wind and CMEs Fe ion charge states dielectronic recombination
2009/5/6
We discuss needs in dielectronic recombination data motivated
by recent work directed at a quantitative understanding of ion charge
states of various elements observed in situ in the solar wind and ...
Comparisons between two wavelet functions in extracting coherent structures from solar wind time
Wavelet Analysis Coherent Structures Solar Variables Turbulence
2010/7/5
Nowadays, wavelet analysis of turbulent flows have become increasingly popular. However, the study of geometric characteristics from wavelet functions is still poorly explored. In this work we compare...
Astrophysicists find fractal image of Sun?Storm Season? imprinted on Solar Wind
Storm Season Solar Wind solar system
2007/5/30
26 May 2007，Plasma astrophysicists at the University of Warwick have found that key information about the Sun’s ’storm season’ is being broadcast across the solar system in a fractal snapshot imprinte...
May 17, 2007，Helium may act as a "throttle" for the solar wind, setting its minimum speed, according to new results from an MIT-led team using NASA’s Wind spacecraft.
Statistical and Wavelet Analysis of the Solar Wind Data
Statistical and Wavelet Analysis the Solar Wind Data
2010/10/14
We perform statistical and wavelet analysis of three time series based on the solar wind velocity of the year 2000, the original time series and two filtered components. We use the Haar Wavelet Transf...
Multiple Spacecraft Observations of Energetic Ions During a High Solar Wind Pressure Event
The spacecraft the solar wind pressure the polar satellites high-energy particles the solar wind speed
2017/3/23
On 28 June 1999 the Wind spacecraft (near the forward libration point) observed a large solar wind pressure spike from 0445 UT to 0600 UT. The Polar satellite at 7 hours magnetic local time detected a...
The Use of Iron Charge State Changes as a Tracer for Solar Wind Entry and Energization within the Magnetosphere
Charge the volume element the solar wind plasma magnetosphere plasma excitation process the solar wind plasma
2017/3/23
The variation of the charge state of iron [Fe] ions is used to trace volume elements of plasma in the solar wind into the magnetosphere and to determine the time scales associated with the entry into ...