Solar Physics

, Volume 193, Issue 1–2, pp 77–92 | Cite as

Width Variations along Coronal Loops Observed by TRACE

  • J.A. Watko
  • J.A. Klimchuk


We have measured width variations along coronal loops observed by TRACE in the 171, 195, and 284 Å bandpasses. The loops are not significantly thicker in the middle compared to near the footpoints, and there is no correlation between the footpoint-to-midpoint expansion and the loop length. This applies to both post-flare and non-flare loops. The observations conflict with our present understanding of active region magnetic fields, and they have important implications for the structure and heating of the corona.


Magnetic Field Active Region Important Implication Coronal Loop Loop Length 
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Copyright information

© Kluwer Academic Publishers 2000

Authors and Affiliations

  • J.A. Watko
    • 1
  • J.A. Klimchuk
    • 2
  1. 1.U.S. Naval Research LaboratoryThe Johns Hopkins University, Praxis, Inc.U.S.A.
  2. 2.U.S. Naval Research LaboratoryWashingtonU.S.A.

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