Accession Number:

ADA517985

Title:

First-Principles Simulations of Violent Space-Weather Events

Descriptive Note:

Journal article

Corporate Author:

NAVAL RESEARCH LAB WASHINGTON DC LAB FOR COMPUTATIONAL PHYSICS AND FLUID DYNAMICS

Personal Author(s):

Report Date:

2008-01-01

Pagination or Media Count:

10.0

Abstract:

We have developed a first-principles model for simulating the initiation and propagation of magnetic eruptions originating in the Suns atmosphere. The ejecta from these violent events adversely affect military and civilian facilities and operations on Earth. Energetic particles and radiation also pose prompt, direct hazards to technological systems and humans in space. Recently we have demonstrated that slow, coherent motions across the solar surface can energize susceptible magnetic field configurations and power subsequent catastrophic eruptions. The velocities and energies of our simulated events compare favorably with those observed, as do their morphological magnetic-field and plasma signatures. Our results also exhibit homology repeated similar events originating from a single source, prompt reformation of the source region in the low solar atmosphere, and a magnetic-bottle configuration of the ejected field in the interplanetary medium. A fundamental understanding of these phenomena is a prerequisite for future physics-based forecasting of space weather.

Subject Categories:

  • Meteorology
  • Computer Programming and Software
  • Electricity and Magnetism
  • Atomic and Molecular Physics and Spectroscopy
  • Unmanned Spacecraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE