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The Observational Signature of Flux Tube Waves and an Upper Limit on the Energy Flux Transported by Them

Published online by Cambridge University Press:  08 February 2017

S.K. Solanki  and
B. Roberts
S.K. Solanki
Affiliation:
Department of Mathematical Sciences University of St Andrews St Andrews, KY16 9SS Scotland
B. Roberts
Affiliation:
Department of Mathematical Sciences University of St Andrews St Andrews, KY16 9SS Scotland

Abstract

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The influence of undamped linear longitudinal tube waves on Stokes V profiles is considered. A rough upper limit is set on the energy flux transported by such waves through the photosphere. It is found that this upper limit is larger than the flux in the quiet sun. However, due to the small filling factor of the magnetic elements, the total luminosity of flux tube waves is unlikely to be larger than that of acoustic waves when averaged over the whole sun. Therefore, probably both kinds of waves contribute to chromospheric heating. However, the derived upper limit does not rule out that flux tube waves can significantly enhance the chromospheric brightness in active regions and the supergranular network where the magnetic filling factor is large.

Type
IV. Magnetohydrodynamics of the Photosphere
Information
Symposium - International Astronomical Union , Volume 138: Solar Photosphere: Structure, Convection and Magnetic Fields , 1990 , pp. 259 - 262
Copyright
Copyright © Kluwer 1990 

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