An estimate of P-Mode damping by wave leakage

I. De Moortel, R. Rosner

Research output: Contribution to journalArticlepeer-review

11 Citations (Scopus)

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) x 10(3) 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.

Original languageEnglish
Pages (from-to)53-63
Number of pages11
JournalSolar Physics
Volume246
Issue number1
DOIs
Publication statusPublished - Nov 2007

Keywords

  • MHD : oscillations
  • corona
  • activity
  • LONGITUDINAL INTENSITY OSCILLATIONS
  • CORONAL MAGNETIC-FIELDS
  • SLOW MHD WAVES
  • TRANSITION REGION
  • PHOTOSPHERIC OSCILLATIONS
  • SOLAR CHROMOSPHERE
  • LOOPS
  • TRACE
  • SUNSPOTS
  • ENERGY

Fingerprint

Dive into the research topics of 'An estimate of P-Mode damping by wave leakage'. Together they form a unique fingerprint.

Cite this