Time-distance seismology of the solar corona with CoMP
Tomczyk, S., & McIntosh, S. W. (2009). Time-distance seismology of the solar corona with CoMP. The Astrophysical Journal, 697, 1384-1391. doi:10.1088/0004-637X/697/2/1384
We employ a sequence of Doppler images obtained with the Coronal Multi-channel Polarimeter (CoMP) instrument to perform time-distance seismology of the solar corona. We construct the first k-ω diagrams of the region. These allow us to separate outward and inward propagating waves and estimate the... Show moreWe employ a sequence of Doppler images obtained with the Coronal Multi-channel Polarimeter (CoMP) instrument to perform time-distance seismology of the solar corona. We construct the first k-ω diagrams of the region. These allow us to separate outward and inward propagating waves and estimate the spatial variation of the plane-of-sky-projected phase speed, and the relative amount of outward and inward directed wave power. The disparity between outward and inward wave power and the slope of the observed power-law spectrum indicate that low-frequency Alfvénic motions suffer significant attenuation as they propagate, consistent with isotropic MHD turbulence. Show less