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Measurement of Galactic Logarithmic Spiral Arm Pitch Angle Using Two-Dimensional Fast Fourier Transform Decomposition
Galactic Logarithmic Spiral Arm Pitch Angle Two-Dimensional Fast Fourier Transform Decomposition
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2012/2/23
A logarithmic spiral is a prominent feature appearing in a majority of observed galaxies. This feature has long been associated with the traditional Hubble classification scheme, but historical quotes...
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
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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...
Implications of Unusual Pitch-Angle Distributions Observed by ISEE-1 and 2
High-energy particle distribution of spiral Angle ISEE satellites high-energy protons function
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2017/3/23
Unusual energetic particle pitch angle distributions (PADs) were observed by the ISEE-1 and 2 satellites at 3 h MLT and a radial distance of about 10–15RE during the time period of 07:00-14:00 UT on 3...
Butterfly Pitch Angle Distributions Observed by ISEE-1
ISEE - 1 satellite protons electrons and electron volts low latitudes outside the magnetosphere school particles spiral Angle
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2017/3/23
The ISEE-1 satellite has observed butterfly pitch angle distributions (PAD) in protons and electrons from 20 keV to 2 MeV in the low latitude outer magnetosphere, which showed a sharp dropout in the f...