Topic
Dipole model of the Earth's magnetic field
About: Dipole model of the Earth's magnetic field is a research topic. Over the lifetime, 2756 publications have been published within this topic receiving 83021 citations.
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TL;DR: In this article, the global structure of the outer heliosphere under the interaction of the solar wind plasma with the interstellar medium is studied by means of MHD computer simulation in the axisymmetric system.
29 citations
TL;DR: In this article, it was shown that the general characteristics of the cosmic-ray intensity variations can be explained in terms of a large-scale interplanetary magnetic field of predominantly dipole character but containing small-scale irregularities which act as scattering centres.
Abstract: It is shown that the general characteristics of the cosmic-ray intensity variations can be explained in terms of a large-scale interplanetary magnetic field of predominantly dipole character but containing small-scale irregularities which act as scattering centres. It is suggested that the cosmic-ray data can be taken as evidence for the existence of such a field. The strength of the field, which is generated by current systems in the solar corona, is dependent on the level of solar activity but must in general be in the region of 10-5 to 10-4 gauss at the earth's orbit.
29 citations
TL;DR: Apollo 15 subsatellite magnetic field observations have been used to measure both the permanent and the induced lunar dipole moments, indicating the existence of a weak lunar ionosphere.
Abstract: Apollo 15 subsatellite magnetic field observations have been used to measure both the permanent and the induced lunar dipole moments Although only an upper limit of 13 x 10 to the 18th gauss-cubic centimeters has been determined for the permanent dipole moment in the orbital plane, there is a significant induced dipole moment which opposes the applied field, indicating the existence of a weak lunar ionosphere
29 citations
TL;DR: In this article, a kinetic collisionless model of the solar wind was proposed to take into account the spiral structure of the interplanetary magnetic field. But the model was not applied to the case of a radial magnetic field, and the results showed that the electron and proton temperatures were not significantly changed.
Abstract: We present a kinetic collisionless model of the solar wind generalized to take into account the spiral structure of the interplanetary magnetic field. This model, which also includes Kappa velocity distributions, calculates self-consistently the electric potential profile and derives the solar wind speed and the temperatures of the medium. We study how the inclusion of the spiral geometry changes the plasma parameters compared to the case of a radial magnetic field. Whereas the interplanetary electric potential, the wind density and bulk speed are not significantly changed, we show that the electron and proton temperatures are modified; in particular, we find a decrease of the proton temperature and of its anisotropy, and an increase of the electron temperature. We discuss these results and the validity of the model.
29 citations
TL;DR: The electric current configuration induced in the ionosphere of Venus by the interaction of the solar wind has been calculated in previous papers as discussed by the authors for average steady-state solar wind conditions and interplanetary magnetic field.
29 citations