Effect of coronal structure on loop oscillations

Details Effect of coronal structure on loop oscillations Effect of coronal structure on loop oscillations

Oct 2006

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2006a%26a...457..707d&link_type=abstract

Astronomy and Astrophysics, Volume 457, Issue 2, October II 2006, pp.707-715

Astronomy and Astrophysics

Astrophysics

16

Sun: Oscillations, Sun: Magnetic Fields, Sun: Corona

Scientific paper

Aims.We investigate the influence of longitudinal structuring of the surrounding corona on the modes of oscillation of a coronal magnetic flux tube. Methods: .A partial differential equation is derived for the total pressure perturbation of the fast modes and it is solved analytically in terms of Bessel functions, obtaining a dispersion relation. Results: .The introduction of coronal structuring changes the cutoff frequency, enhancing coronal leakage, so even the fundamental kink mode may become leaky. Structure also modifies the loop's oscillatory frequencies and may result in higher harmonics being trapped. Conclusions: .Depending on the structuring, two competing effects take place: environmental structuring enhances leakage, while loop structuring helps confine the modes. This has important consequences for coronal seismology, leading to the absence of trapped modes for certain parameters and shifts in frequencies.

Affiliated with

Also associated with

No associations

Rating

Effect of coronal structure on loop oscillations does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.

If you have personal experience with Effect of coronal structure on loop oscillations, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Effect of coronal structure on loop oscillations will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-867889