Projects per year
Abstract
Context. Slow waves in solar coronal loops are strongly damped. The current theory of damping by thermal conduction cannot explain some observational features.
Aims. We investigate the propagation of slow waves in a coronal loop built up from strands of different temperatures.
Methods. We consider the loop to have a multithermal, Gaussian temperature distribution. The different propagation speeds in different strands lead to an multithermal apparent damping of the wave, similar to observational phase mixing. We use an analytical model to predict the damping length and propagation speed for the slow waves, including in imaging with filter telescopes.
Results. We compare the damping length due to this multithermal apparent damping with damping due to thermal conduction and find that the multithermal apparent damping is more important for shorter period slow waves. We have found the influence of instrument filters on the wave's propagation speed and damping. This allows us to compare our analytical theory to forward models of numerical simulations.
Conclusions. We find that our analytical model matches the numerical simulations very well. Moreover, we offer an outlook for using the slow wave properties to infer the loop's thermal properties.
Aims. We investigate the propagation of slow waves in a coronal loop built up from strands of different temperatures.
Methods. We consider the loop to have a multithermal, Gaussian temperature distribution. The different propagation speeds in different strands lead to an multithermal apparent damping of the wave, similar to observational phase mixing. We use an analytical model to predict the damping length and propagation speed for the slow waves, including in imaging with filter telescopes.
Results. We compare the damping length due to this multithermal apparent damping with damping due to thermal conduction and find that the multithermal apparent damping is more important for shorter period slow waves. We have found the influence of instrument filters on the wave's propagation speed and damping. This allows us to compare our analytical theory to forward models of numerical simulations.
Conclusions. We find that our analytical model matches the numerical simulations very well. Moreover, we offer an outlook for using the slow wave properties to infer the loop's thermal properties.
Original language | English |
---|---|
Publisher | arXiv |
Number of pages | 9 |
Publication status | Published - 18 Jan 2024 |
Fingerprint
Dive into the research topics of 'Multithermal apparent damping of slow waves due to strands with a Gaussian temperature distribution'. Together they form a unique fingerprint.-
Solar and Magnetospheric Plasmas: Solar and Magnetospheric Plasmas: Theory and Application
Neukirch, T. (PI), Archontis, V. (CoI), De Moortel, I. (CoI), Hood, A. W. (CoI), Mackay, D. H. (CoI), Parnell, C. E. (CoI) & Wright, A. N. (CoI)
Science & Technology Facilities Council
1/04/22 → 31/03/25
Project: Standard
-
WholeSun ERC Project: H2020 ERC Synergy Grant Whole Sun Project
Archontis, V. (PI), Hood, A. W. (Researcher), Mackay, D. H. (Researcher) & Syntelis, P. (Researcher)
1/05/19 → 30/04/25
Project: Standard
-
Solar and Magnetospheric: Solar and Magnetospheric Magnetohydrodynamics and Plasmas: Theory and Application
Hood, A. W. (PI), Archontis, V. (CoI), De Moortel, I. (CoI), Mackay, D. H. (CoI), Neukirch, T. (CoI), Parnell, C. E. (CoI) & Wright, A. N. (CoI)
Science & Technology Facilities Council
1/04/19 → 31/03/22
Project: Standard