Astronomy and Astrophysics – Astrophysics
Scientific paper
Feb 2009
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2009a%26a...495..313o&link_type=abstract
Astronomy and Astrophysics, Volume 495, Issue 1, 2009, pp.313-318
Astronomy and Astrophysics
Astrophysics
4
Sun: Corona, Sun: Oscillations, Sun: Magnetic Fields, Magnetohydrodynamics (Mhd)
Scientific paper
Aims: We consider a model of a two-dimensional solar coronal arcade to explore the effects of a curved magnetic field topology on excitation and attenuation of slow magnetoacoustic standing waves. Methods: The time-dependent ideal magnetohydrodynamic equations are solved numerically to find the spatial and temporal signatures of these waves. Results: A pulse in gas pressure initially launched at a loop footpoint excites the fundamental mode of slow magnetoacoustic standing waves. The typical excitation time of such a wave mode is 2.5 wave periods, with a similar attenuation timescale. These values are remarkably similar to those recovered from observations by SOHO/SUMER in an Fe XIX line. Conclusions: Slow magnetoacoustic standing waves are excited and attenuated more efficiently in curved magnetic field lines than in a straight magnetic slab topology. The waves supported by the magnetic arcade are in far closer agreement with observations.
Murawski Kris
Ogrodowczyk R.
Solanki Sami K.
No associations
LandOfFree
Slow magnetoacoustic standing waves in a curved solar coronal slab 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 Slow magnetoacoustic standing waves in a curved solar coronal slab, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Slow magnetoacoustic standing waves in a curved solar coronal slab will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-834340