On excited frequencies for Alfvén waves in a coronal arcade

Abstract

The normal modes of oscillation for a magnetic arcade are used to analytically solve an initial value problem and estimate the power spectra of wave frequencies generated by a reconnection event in the solar corona. Over a realistic range of parameters, I find that such a disturbance generates a peak power at $\sim 10$s$\mathrm{mHz}$ frequencies, but still substantial power up to $\sim 4\mathrm{Hz}$. The cadence and sensitivity of current instrumentation does not allow observations of oscillations at these frequencies, but in the near future, new instrumentation will be able to probe this regime, and observationally determine its energetic importance.

arXiv comment5 pages, 1 figure; Accepted for publication in ApJ

References in corpus (9)

• Heating of the Solar Chromosphere and Corona by Alfven Wave Turbulence
• Direct Imaging by SDO AIA of Quasi-periodic Fast Propagating Waves of ~2000 km/s in the Low Solar Corona
• Unprecedented Fine Structure of a Solar Flare Revealed by the 1.6~m New Solar Telescope
• Simulations of the Mg II k and Ca II 8542 lines from an Alfvén Wave-heated flare chromosphere
• Alfvénic Wave Heating of the Upper Chromosphere in Flares
• Alfvén Wave Heating of the Solar Chromosphere: 1.5D models
• Hi-C & AIA observations of transverse MHD waves in active regions
• Eigenmodes of three-dimensional magnetic arcades in the Sun's corona
• Three-Dimensional Propagation of Magnetohydrodynamic Waves in Solar Coronal Arcades

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• Possible Atmospheric Diversity of Low Mass Exoplanets, some Central Aspects
• Possible Detection of Subsecond-period Propagating Magnetohydrodynamics Waves in Post-reconnection Magnetic Loops during a Two-ribbon Solar Flare
• Constraints on the abundance of primordial black holes with different mass distributions from lensing of fast radio bursts
• Simulating Solar Flare Irradiance with Multithreaded Models of Flare Arcades