We present results from three-dimensional (3-D) numerical simulations investigating the magnetohydrodynamics of cloud-wind interactions. The initial cloud is spherical while the magnetic field is uniform and transverse to the cloud motion. A simplified analytical model that describes the magnetic energy evolution in front of the cloud is developed and compared with simulation results. In additi...

This article is concerned with the Ginzburg{Landau (GL) equations of superconductivity. The equations provide a mathematical model for the study of magnetic ux vortices in superconductors. The focus is on the asymptotic case when the charge of the superconducting charge carriers (Cooper pairs) is vanishingly small and the applied magnetic eld approaches the upper critical eld. It is shown that ...

We reconsider the thermoelectric dynamo model for the generation of the magnetic /eld of Mercury, as proposed by Stevenson (Earth Planet. Sci. Lett. 82 (1987) 114). We brie4y review the status of our knowledge about the nature of Mercury’s planetary /eld, and describe the main features of the /eld generated through a thermoelectric dynamo, including its multipole expansion. We then discuss the ...

Accelerating gradients in SRF cavities have consistently been increasing in recent years, largely due to better surface preparation techniques. This makes the critical magnetic eld, at which the cavity loses its superconductivity, a very important limit to address. We worked to minimize the peak magnetic eld Hpk on the surface of the cavity with respect to the acceleration rate Eacc. Allowing t...

We present VLBA observations of 1667 MHz OH maser emission from the massive star formation region G5.89 0.39. The observations were phase-referenced, allowing the absolute positions of the masers to be obtained. The 1667MHzmasers have radial velocities that span 50 km s 1 but show little evidence of tracing the bipolar molecular outflow, as has been claimed in previous studies. We identify 23 Z...

Analysis of a magnetic cloud recently observed by the WIND spacecraft demonstrated that the magnetic uctuations were more nearly transverse to the mean magnetic eld than is commonly seen in the solar wind. It was also apparent that the wave vectors were oriented at large angles to the mean eld to a degree that exceeded normal solar wind conditions. This orientation is particularly ineeec-tive a...

A recently developed perturbation theory for solving self-consistent-eld equations is applied to the hydrogen atom in a strong magnetic eld. This system has been extensively studied using other methods and is therefore a good test case for the new method. The perturbation theory yields summable large-order expansions. The accuracy of the self-consistent-eld approximation varies according to eld...

We develop a detailed chemical model for the starless cores of strongly magnetized molecular clouds, with the ambipolar diffusion-driven dynamic evolution of the clouds coupled to the chemistry through ion abundances. We concentrate on two representative model clouds in this initial study, one with magnetic fields and the other without. The model predictions on the peak values and spatial distr...

We prove that the global minimizer of the Ginzburg-Landau functional of super-conductors in an external magnetic eld is, below the rst critical eld, the vortex-less solution found in S1].

1. Abstract We present in this paper a Computer Aided Education Package allowing to visualize the magnetic eld in and around the magnetic circuit of a double-U shaped contactor. The objective of this application is to allow students to intuitively understand the distribution of the magnetic eld when varying geometrical, electrical and magnetic parameters. The modeling of this problem is perform...