Astronomy and Astrophysics – Astronomy
Scientific paper
May 2011
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011spd....42.1805s&link_type=abstract
American Astronomical Society, SPD meeting #42, #18.05; Bulletin of the American Astronomical Society, Vol. 43, 2011
Astronomy and Astrophysics
Astronomy
Scientific paper
Recent observations using the Coronal Multi-Channel Polarimeter (CoMP) show ubiquitous propagating waves of low amplitude in magnetic loops of the solar corona. These observations have been interpreted as magnetohydrodynamic (MHD) resonant kink waves. It has been shown that resonant absorption is a robust physical mechanism to explain the observed damping of MHD kink waves in the solar atmosphere due to naturally occurring plasma inhomogeneity in the direction transverse to the magnetic field. In the present study, for the first time we investigate the properties of propagating kink waves in solar magnetic waveguides including the effects of both longitudinal and transverse plasma inhomogeneity. Importantly, it is found that the wavelength is only dependent on the longitudinal stratification and the amplitude is simply a product of the two effects. In light of these results the advancement of solar atmospheric magnetoseismology by exploiting high spatial/temporal resolution observations of propagating kink waves in magnetic waveguides to determine the length scales of the plasma inhomogeneity along and transverse to the direction of the magnetic field is discussed.
Goossens Marcel
Soler Roberto
Terradas Jaume
Verth Gary
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