Physics
Scientific paper
Oct 2002
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2002esasp.505..429i&link_type=abstract
In: SOLMAG 2002. Proceedings of the Magnetic Coupling of the Solar Atmosphere Euroconference and IAU Colloquium 188, 11 - 15 Jun
Physics
Sun, Magnetic Field, Photosphere, Corona
Scientific paper
Longitudinally oscillating coronal loops have been seen in TRACE 171 Å data in many different quiescent active regions. The oscillation is thought to be an example of an outwardly propagating slow magneto-acoustic wave. However, the source of these waves is as yet unknown. In the context of SOHO Joint Observing Program 144, we search for a possible photospheric driver to these waves. We examine the photospheric longitudinal magnetic flux underlying an oscillating loop observed between 1200-1300 UT on June 7th 2001. The field was imaged using the Kanzelhöhe Magneto-Optical Filter instrument and the SOHO Michelson Doppler Imager (MDI). The dynamics of the photospheric magnetic field underlying these loops is discussed in the context of possible mechanisms causing the observed coronal oscillations.
de Moortel Ineke
Ireland Jack
Moretti Pier Francesco
Walsh Robert W.
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