Sun-Aligned Polar Cap Auroral Arcs.
Abstract
A model of polar cap auroral arcs is proposed under the assumption that the magnetic field reconnection occurs in the cusp region on tail field lines during northward interplanetary magnetic field (IMF) conditions. Requirements of a convection model during northward IMF are enumerated based on observations and fundamental theoretical considerations. The theta aurora can be expected to occur on the closed field lines convecting sunward in the central polar cap while the less intense polar cap arcs can occur either on closed or open field lines. The dynamo region for the polar cap arcs is required to be on closed field lines convecting tailward in the plasma sheet which is magnetically connected to the sunward convection in the central polar cap. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Oct 05, 1984
- Accession Number
- ADA148052
Entities
People
- J. R. Kan
Organizations
- University of Alaska Fairbanks