Solar Physics

, Volume 246, Issue 1, pp 53–63 | Cite as

An Estimate of P-Mode Damping by Wave Leakage

Article

Abstract

High-cadence TRACE observations show that outward-propagating intensity disturbances are a common feature in large, quiescent coronal loops. Analysis of the frequency distribution of these modes shows peaks at both three- and five-minute periods, indicating that they may be driven by the solar surface oscillations (p modes). The energy flux contained within the coronal intensity disturbances is of the order of (1.1±0.4)×103 ergs cm−2 s−1. A simple order-of-magnitude estimate of the damping rate of the relevant p modes allows us to put an observational constraint on the damping of p modes and shows that leakage into the overlying coronal atmosphere might be able to account for a significant fraction of p-mode damping.

Keywords

MHD: oscillations Corona Activity 

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Copyright information

© Springer 2007

Authors and Affiliations

  1. 1.School of Mathematics and StatisticsUniversity of St AndrewsNorth Haugh, St AndrewsScotland
  2. 2.Enrico Fermi InstituteThe University of ChicagoChicagoUSA

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