Simulated interaction of magnetohydrodynamic shock waves with a complex network-like region

Santamaria, I. C.; Khomenko, E.; Collados, M.; de Vicente, A.
Bibliographical reference

Astronomy and Astrophysics, Volume 590, id.L3, 5 pp.

Advertised on:
5
2016
Number of authors
4
IAC number of authors
4
Citations
11
Refereed citations
10
Description
We provide estimates of the wave energy reaching the solar chromosphere and corona in a network-like magnetic field topology, including a coronal null point. The waves are excited by an instantaneous strong subphotospheric source and propagate through the subphotosphere, photosphere, chromosphere, transition region, and corona with the plasma beta and other atmospheric parameters varying by several orders of magnitude. We compare two regimes of the wave propagation: a linear and nonlinear regime. While the amount of energy reaching the corona is similar in both regimes, this energy is transmitted at different frequencies. In both cases the dominant periods of waves at each height strongly depend on the local magnetic field topology, but this distribution is only in accordance with observations in the nonlinear case. Movies are available in electronic form at http://www.aanda.org