Seismology of quiescent coronal loops

Y. Taroyan*, R. Erdélyi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

1 Citation (SciVal)

Abstract

The determination of the physical parameters of coronal loops remains both an observational and a theoretical challenge. A new diagnostic technique for quiescent dynamically heated coronal loops, based on the analysis of the power spectra of Doppler shift time series, is proposed. It is assumed that a given loop is heated randomly both in space and time by small-scale discrete impulsive events of unspecified nature. It is shown here that, depending on the heliographic position of the loop and the orientation of the observing instrument, various harmonics can be identified in the power spectra of line shift time series. The frequency peaks are sensitive to changes in the average loop temperature and are proposed to use as a temperature diagnostic tool. The analysis of the power spectra also allows to distinguish uniformly heated loops from loops heated near their footpoints.

Original languageEnglish
Pages (from-to)191-192
Number of pages2
JournalProceedings of the International Astronomical Union
Volume2
Issue number233
DOIs
Publication statusPublished - Mar 2006

Keywords

  • Hydrodynamics
  • Line: profiles
  • Sun: corona
  • Sun: oscillations

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