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, relativistic magnetohydrodynamics (RMHD) simulations were carried out to study the effects of very strong magnetic fields on the evolution of the plasma and on resulting flow fluctuations in the ideal RMHD limit.
Abstract: Very strong magnetic fields can arise in noncentral heavy-ion collisions at ultrarelativistic energies, and may not decay quickly in a conducting plasma. We carry out relativistic magnetohydrodynamics (RMHD) simulations to study the effects of this magnetic field on the evolution of the plasma and on resulting flow fluctuations in the ideal RMHD limit. Our results show that the magnetic field leads to enhancement in elliptic flow for small impact parameters while it suppresses it for large impact parameters (which may provide a signal for the initial stage magnetic field). Interestingly, we find that magnetic field in localized regions can temporarily increase in time as evolving plasma energy density fluctuations lead to reorganization of magnetic flux. This can have important effects on the chiral magnetic effect. The magnetic field has nontrivial effects on the power spectrum of flow fluctuations. For the very strong magnetic field case, one sees a pattern of even-odd difference in the power spectrum of flow coefficients arising from reflection symmetry about the magnetic field direction if initial state fluctuations are not dominant. We discuss the situation of nontrivial magnetic field configurations arising from collision of deformed nuclei and show that it can lead to anomalous elliptic flow. Special (crossed body-body) configurations of deformed nuclei collisions can lead to the presence of a quadrupolar magnetic field, which can have very important effects on the rapidity dependence of transverse expansion (similar to beam focusing from quadrupole fields in accelerators).
80 citations
TL;DR: In this article, a selfconsistent calculation of the magnetic field and plasma distribution in the magnetotail has been undertaken for static conditions, and the authors find the best agreement with satellite in the tail for an isotropic particle pitch angle distribution, a slow decrease of magnetic field intensity as a function of distance from the Earth |x|−0.3, and a northward field in the equatorial plane of about 1 gamma at the position of the lunar orbit.
80 citations
80 citations
TL;DR: In this article, the authors used magnetohydrodynamic resonance theory to model the structure of the magnetospheric and ionospheric electric and magnetic fields associated with Pc5 geomagnetic pulsations.
80 citations
TL;DR: The magnetic fields generated by thermal convection in a rapidly rotating fluid spherical shell are studied in this paper, where the inner core is sandwiched between a finitely conducting solid inner core and a nonconducting mantle.
80 citations