Accession Number:

ADA125046

Title:

A Dynamic Model for the Transition Region,

Descriptive Note:

Corporate Author:

STANFORD UNIV CA INST FOR PLASMA RESEARCH

Personal Author(s):

Report Date:

1982-11-01

Pagination or Media Count:

22.0

Abstract:

We develop a model for the lower transition region that can account for the persistent and ubiquitous redshifts that are observed in the UV emission lines formed at these temperatures. We show that these shifts are not likely to be due either to falling spicular material or to steady-state siphon flows. Our model consists of two key ingredients. The redshifted radiation orginates from a minority of flux tubes which have higher gas pressures than their surroundings, and consequently have their transition regions situated below the transition regions of their surroundings. The coronal heating in these loops is impulsive in nature, and this is responsible for the transient mass flows. Our studies, therefore, favor theories for coronal heating which involve flare-like magnetic-energy release. Author

Subject Categories:

  • Astrophysics
  • Ultraviolet Detection and Detectors

Distribution Statement:

APPROVED FOR PUBLIC RELEASE