An Interaction between Hydromagnetic Oscillations and Magnetospheric Convections

Interaction of Energetic Ring Current Protons with Magnetospheric Hydromagnetic Waves

On hydromagnetic oscillations in a rotating cavity

Time-dependent hydromagnetic phenomena in a rotating spherical cavity are investigated in the framework of an interior boundary-layer expansion. The interior problem is shown to contain waves whose frequencies are of order o, A o and A2u, where w is the rotation rate of the cavity and A2 = B2/4npu2R2 < 1 is the Alfven number. B is an imposed magnetic field, p the fluid density and R the radius ...

Epidemic oscillations: Interaction between delays and seasonality

Traditional epidemic models consider that individual processes occur at constant rates. That is, an infected individual has a constant probability per unit time of recovering from infection after contagion. This assumption certainly fails for almost all infectious diseases, in which the infection time usually follows a probability distribution more or less spread around a mean value. We show a ...

A possible link between kHz quasi-periodic oscillations and the magnetospheric boundary

The quasi-periodic oscillations (QPOs) observed with a 200-1300 Hz frequency range in the X-ray power spectra of low mass X-ray binaries (LMXBs) might be considered as one of the observational clues to the physics at the innermost regions of accretion disks around neutron stars. In a neutron star LMXB, the magnetospheric boundary is likely to be close to the surface of the neutron star because ...

Self oscillations of a forced inhomogeneous hydromagnetic cavity

We study the nonlinear development of MHD waves in a one dimensional cavity stratified by gravity and embedded in background, homogeneous, vertical magnetic field which produces an anisotropic viscosity. The plasma is compressible and its temperature is homogeneous over most of the cavity, rising to large values in a narrow ‘transition zone’ near its upper boundary. Disturbances at the cavity’s...