An Estimate of P-Mode Damping by Wave Leakage

Details An Estimate of P-Mode Damping by Wave Leakage An Estimate of P-Mode Damping by Wave Leakage

Nov 2007

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007soph..246...53d&link_type=abstract

Solar Physics, Volume 246, Issue 1, pp.53-63

Physics

9

Mhd: Oscillations, Corona, Activity

Scientific paper

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.

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