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Seismological constraints on the solar coronal heating function
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Kolotkov, Dmitrii, Duckenfield, Timothy and Nakariakov, V. M. (Valery M.) (2020) Seismological constraints on the solar coronal heating function. Astronomy & Astrophysics, 644 . 33. doi:10.1051/0004-6361/202039095
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WRAP-Seismological-constraints-solar-coronal-heating-function-Nakariakov-2020.pdf - Accepted Version - Requires a PDF viewer. Download (4Mb) | Preview |
Official URL: http://dx.doi.org/10.1051/0004-6361/202039095
Abstract
Aims. The hot solar corona exists because of the balance between radiative and conductive cooling and some counteracting heating mechanism that remains one of the major puzzles in solar physics.
Methods. The coronal thermal equilibrium is perturbed by magnetoacoustic waves, which are abundantly present in the corona, causing a misbalance between the heating and cooling rates. As a consequence of this misbalance, the wave experiences a back-reaction, either losing or gaining energy from the energy supply that heats the plasma, at timescales comparable to the wave period.
Results. In particular, the plasma can be subject to wave-induced instability or over-stability, depending on the specific choice of the coronal heating function. In the unstable case, the coronal thermal equilibrium would be violently destroyed, which does not allow for the existence of long-lived plasma structures typical for the corona. Based on this, we constrained the coronal heating function using observations of slow magnetoacoustic waves in various coronal plasma structures.
| Item Type: | Journal Article | |||||||||||||||
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| Subjects: | Q Science > QB Astronomy | |||||||||||||||
| Divisions: | Faculty of Science, Engineering and Medicine > Science > Physics | |||||||||||||||
| Library of Congress Subject Headings (LCSH): | Helioseismology, Solar oscillations, Surface waves (Seismology) , Sun -- Corona, Solar activity | |||||||||||||||
| Journal or Publication Title: | Astronomy & Astrophysics | |||||||||||||||
| Publisher: | EDP Sciences | |||||||||||||||
| ISSN: | 0004-6361 | |||||||||||||||
| Official Date: | December 2020 | |||||||||||||||
| Dates: |
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| Volume: | 644 | |||||||||||||||
| Article Number: | 33 | |||||||||||||||
| DOI: | 10.1051/0004-6361/202039095 | |||||||||||||||
| Status: | Peer Reviewed | |||||||||||||||
| Publication Status: | Published | |||||||||||||||
| Reuse Statement (publisher, data, author rights): | “Reproduced with permission from Astronomy & Astrophysics, © ESO”. | |||||||||||||||
| Access rights to Published version: | Restricted or Subscription Access | |||||||||||||||
| Copyright Holders: | © ESO | |||||||||||||||
| RIOXX Funder/Project Grant: |
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