Astronomy and Astrophysics – Astronomy
Scientific paper
Jun 2006
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006spd....37.1307m&link_type=abstract
American Astronomical Society, SPD meeting #37, #13.07; Bulletin of the American Astronomical Society, Vol. 38, p.241
Astronomy and Astrophysics
Astronomy
Scientific paper
Doppler-shift and associated intensity oscillations have been observed in high-temperature flare emission lines with both the SUMER experiment on SOHO and the Bragg Crystal Spectrometer (BCS) on Yohkoh. These have been identified as standing slow-mode waves, leading to the possibility that modeling of the wave evolution can lead to improved understanding of the conditions in the flaring structures. In this presentation, I show some examples of the BCS data and initial results from loop heating numerical simulations aimed at studying the initiation and evolution of the oscillations. Many impulsive heating schemes easily excite oscillations in the loop plasma. A key issue for investigation, however, is whether detailed geometric information on the flaring loop or loops coupled with the oscillation observations can critically constrain the characteristics of the heating.
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