Determination of the Coronal Magnetic Field by Hot Loop Oscillations Observed by SUMER and SXT

Details Determination of the Coronal Magnetic Field by Hot Loop Oscillations Observed by SUMER and SXT Determination of the Coronal Magnetic Field by Hot Loop Oscillations Observed by SUMER and SXT

Jun 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.1803w&link_type=abstract

American Astronomical Society, SPD meeting #37, #18.03; Bulletin of the American Astronomical Society, Vol. 38, p.246

Astronomy and Astrophysics

Astronomy

Scientific paper

Strongly damped Doppler shift oscillations in hot coronal loops were recently detected with SOHO/SUMER as a new phenomenon, which are best interpreted in terms of standing slow mode waves. A series of papers have been done to explore their physical properties, damping mechanism and excitations. In this paper, we analyze seven oscillation cases observed with both SUMER and SXT. With SXT images we measure the geometrical parameters, plasma density and temperature of the oscillating loops. Combined with the oscillation periods measured from SUMER, we show that their information can be applied to determine the mean coronal field strength in the loops based on the MHD wave theory. The restriction of this method and measurement uncertainties will be discussed.

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