Results 251 to 260 of about 35,714 (290)

Interplanetary Magnetic Fields and Cosmic Rays

Physical Review, 1955
The existence in the region around the sun of a field-free cavity in the galactic magnetic field seems indicated by the low-energy cosmic rays that reach the earth from the sun. Such a cavity would be produced by the solar corpuscular emission. A mean radius of the order of 200 times the distance from the sun to the earth may be estimated for this ...
openaire   +1 more source

Coronal and interplanetary magnetic field models

AIP Conference Proceedings, 1999
We provide an historical perspective of coronal and interplanetary field models. The structure of the interplanetary medium is controlled by the coronal magnetic field from which the solar wind emanates. This field has been described with “Source Surface” (SS) and “Heliospheric Current Sheet” (HCS) models.
openaire   +1 more source

Sector Structure of the Quiet Interplanetary Magnetic Field

Science, 1965
Observations of the interplanetary magnetic field by the Imp-1 satellite have revealed a regular longitudinal sector structure in this field. The sectors co-rotate with the sun; as an average sector sweeps past the earth the magnitude of the interplanetary field decreases from greater than 6 gammas (1 gamma = 10 -5 ...
N F, Ness, J M, Wilcox
openaire   +2 more sources

Substorms and the interplanetary magnetic field

Journal of Geophysical Research, 1976
Although it has been established that there is a strong relationship between observed substorms and the southward component of the interplanetary field B/sub z/, there remains a controversy concerning models explaining this relationship. An analysis of a statistical study of isolated substorms and the related interplanetary fields had previously ...
openaire   +1 more source

Solar and Interplanetary Magnetic Field I. The General Magnetic Field

Publications of the Astronomical Society of Japan, 1956
Abstract It is proposed that a possible solar and interplanetary magnetic field may have been built up by the movement of conducting material, steadily emitted from the sun, through the solar original magnetic field. An unknown function S(φ) and two parameters N and n, in this theory, are necessary to account for the shape of of lines ...
openaire   +1 more source

Magnetic fields in the interplanetary medium

Advances in Space Research, 1982
Interplanetary magnetic field lines are attached to the Sun at one end • and their form is determined primarily by the motions of the solar wind and by the rotation of the Sun. The solar wind, in effect, carries the magnetic field lines with it as it moves radially away from the Sun, while the Sun carries the base of each line along a circle as it ...
openaire   +1 more source

Interplanetary Magnetic Field Disturbances Optimization

This paper proposes a heuristic optimization algorithm based on interplanetary magnetic field disturbances (IMF disturbances), named IMF-Driven Optimization (IMFDO+). This algorithm innovatively incorporates magnetic cloud spiral guidance, shock wave penetration acceleration, adaptive magnetic reconnection memory, and a disturbance-attenuation feedback
openaire   +1 more source

Mariner 10 Interplanetary Magnetic Field Results

2013
Interplanetary magnetic field data obtained by Mariner 10 between November 1973 and March 1974 are examined. Though large variations in the field due to the effects of high speed streams and stream-stream interactions were observed, on average the large scale interplanetary magnetic field radial component was found to have a distance dependence of r to
openaire   +1 more source

The interplanetary magnetic field from a time-dependent solar magnetic field

Journal of Geophysical Research, 1976
Effects of the time dependence of the sun's magnetic field upon the interplanetary field in the solar wind are considered. General expressions for the interplanetary field are developed under the assumptions that the radial component of the sun's field at some reference surface r/sub 0/ can be described in terms of spherical harmonics with coefficients
openaire   +1 more source

Azimuthal Magnetic Field Disturbances and Spiral Structure of Interplanetary Magnetic Field

Chinese Journal of Geophysics, 2004
AbstractA 2.5 dimensional, ideal MHD model in spherical coordinates is used to numerically simulate the propagation of azimuthal magnetic field disturbances with emphasis upon its influence on the spiral angle of the interplanetary magnetic field (IMF).
openaire   +1 more source