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A new look at the frequency-dependent damping of slow-mode waves in the solar corona
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Kolotkov, Dmitrii Y. and Nakariakov, Valery M. (2022) A new look at the frequency-dependent damping of slow-mode waves in the solar corona. Monthly Notices of the Royal Astronomical Society: Letters, 514 (1). L51-L55. doi:10.1093/mnrasl/slac054
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WRAP-new-look-frequency-dependent-damping-slow-mode-waves-2022.pdf - Accepted Version - Requires a PDF viewer. Download (1529Kb) | Preview |
Official URL: https://doi.org/10.1093/mnrasl/slac054
Abstract
Being directly observed in the Doppler shift and imaging data and indirectly as quasi-periodic pulsations in solar and stellar flares, slow magnetoacoustic waves offer an important seismological tool for probing many vital parameters of the coronal plasma. A recently understood active nature of the solar corona for magnetoacoustic waves, manifested through the phenomenon of wave-induced thermal misbalance, led to the identification of new natural mechanisms for the interpretation of observed properties of waves. A frequency-dependent damping of slow waves in various coronal plasma structures remains an open question, as traditional wave damping theories fail to match observations. We demonstrate that accounting for the back-reaction caused by thermal misbalance on the wave dynamics leads to a modification of the relationship between the damping time and oscillation period of standing slow waves, prescribed by the linear theory. The modified relationship is not of a power-law form and has the equilibrium plasma conditions and properties of the coronal heating/cooling processes as free parameters. It is shown to readily explain the observed scaling of the damping time with period of standing slow waves in hot coronal loops. Functional forms of the unknown coronal heating process, consistent with the observed frequency-dependent damping, are seismologically revealed.
| Item Type: | Journal Item | ||||||||
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| Subjects: | Q Science > QB Astronomy Q Science > QC Physics |
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| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | ||||||||
| SWORD Depositor: | Library Publications Router | ||||||||
| Library of Congress Subject Headings (LCSH): | Sun -- Corona, Sun, Solar oscillations, Magnetohydrodynamic waves | ||||||||
| Journal or Publication Title: | Monthly Notices of the Royal Astronomical Society: Letters | ||||||||
| Publisher: | Oxford University Press (OUP) | ||||||||
| ISSN: | 1745-3933 | ||||||||
| Official Date: | July 2022 | ||||||||
| Dates: |
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| Volume: | 514 | ||||||||
| Number: | 1 | ||||||||
| Page Range: | L51-L55 | ||||||||
| DOI: | 10.1093/mnrasl/slac054 | ||||||||
| Status: | Peer Reviewed | ||||||||
| Publication Status: | Published | ||||||||
| Reuse Statement (publisher, data, author rights): | This article has been accepted for publication in Monthly Notices of the Royal Astronomical Society: Letters ©: 2022 The Author's Published by Oxford University Press on behalf of the Royal Astronomical Society. All rights reserved. | ||||||||
| Access rights to Published version: | Restricted or Subscription Access | ||||||||
| Date of first compliant deposit: | 2 August 2022 | ||||||||
| Date of first compliant Open Access: | 2 August 2022 | ||||||||
| RIOXX Funder/Project Grant: |
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