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Loops: Twisting and Scaling

Published online by Cambridge University Press:  26 May 2016

Robert W. Walsh
Robert W. Walsh*
Affiliation:
Centre for Astrophysics, University of Central Lancashire, Preston, Lancashire PR1 2HE, UK

Abstract

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Loop-like structures are the fundamental magnetic building blocks of the solar atmosphere. Recent space-based EUV and X-ray satellite observations (from Yohkoh, SOHO and TRACE) have challenged the view that these features are simply static, gravitationally stratified plasma pipes. Rather, it is now surmised that each loop may consist of a bundle of fine plasma threads that are twisted around one another and can brighten independently. This invited paper will outline the latest developments in “untangling” the topology of these features through observational analysis and magnetohydrodynamic modelling. In particular, recent interest has centred on how the observed thermal profile along loops can be employed as a tool to diagnose any localised energy input to the structure and hence constrain the presence of a particular coronal heating mechanism. The implications of superior resolution plasma thread observations (whether spatial, temporal or spectral) from future space missions (SolarB, STEREO, Solar Dynamics Observatory and Solar Orbiter) will be discussed.

Type
Part 10: Structural Elements: Magnetic Loops
Information
Symposium - International Astronomical Union , Volume 219: Stars as Suns : Activity, Evolution and Planets , 2004 , pp. 517 - 528
Copyright
Copyright © Astronomical Society of the Pacific 2004 

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