Accession Number:

ADA503355

Title:

Predicting Flare Properties Using the Minimum Current Corona Model

Descriptive Note:

Final rept. 31 March 2007-2009

Corporate Author:

NORTHWEST RESEARCH ASSOCIATES INC BELLEVUE WA

Personal Author(s):

Report Date:

2009-05-27

Pagination or Media Count:

15.0

Abstract:

The objective of our original proposal was to use the Minimum Current Corona MCC model to determine where strong currents are likely to develop above an active region, and compare the locations with observed flare signatures. If there is a good correspondence, we can also estimate the energy available for the flare from the current sheet in question. In the MCC model, the magnetic field in the corona is represented by the field due to a collection of point sources on the boundary a Magnetic Charge Topology MCT model. Evolving these sources consistent with the evolution of the boundary causes currents to begin flowing in the corona. The minimum energy state occurs when currents flow only along separator field lines topologically significant field lines which connect magnetic null points. In the absence of reconnection, the magnitudes of these currents can be estimated, along with the energy stored by each.

Subject Categories:

  • Electricity and Magnetism

Distribution Statement:

APPROVED FOR PUBLIC RELEASE