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  Impulsive coronal heating during the interaction of surface magnetic fields in the lower solar atmosphere

Chitta, L. P., Peter, H., Priest, E. R., & Solanki, S. K. (2020). Impulsive coronal heating during the interaction of surface magnetic fields in the lower solar atmosphere. Astronomy and Astrophysics, 644: A130. doi:10.1051/0004-6361/202039099.

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Item Permalink: http://hdl.handle.net/21.11116/0000-0007-B362-0 Version Permalink: http://hdl.handle.net/21.11116/0000-0007-B363-F
Genre: Journal Article

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 Creators:
Chitta, L. P.1, Author              
Peter, H.1, Author              
Priest, E. R., Author
Solanki, S. K.1, Author              
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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Free keywords: magnetic reconnection / Sun: chromosphere / Sun: corona / Sun: magnetic fields / Sun: transition region / Sun: flares
 Abstract: Coronal plasma in the cores of solar active regions is impulsively heated to more than 5 MK. The nature and location of the magnetic energy source responsible for such impulsive heating is poorly understood. Using observations of seven active regions from the Solar Dynamics Observatory, we found that a majority of coronal loops hosting hot plasma have at least one footpoint rooted in regions of interacting mixed magnetic polarity at the solar surface. In cases when co-temporal observations from the Interface Region Imaging Spectrograph space mission are available, we found spectroscopic evidence for magnetic reconnection at the base of the hot coronal loops. Our analysis suggests that interactions of magnetic patches of opposite polarity at the solar surface and the associated energy release during reconnection are key to impulsive coronal heating.

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Language(s): eng - English
 Dates: 2020
 Publication Status: Published online
 Pages: -
 Publishing info: -
 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1051/0004-6361/202039099
 Degree: -

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Title: Astronomy and Astrophysics
  Other : Astron. Astrophys.
Source Genre: Journal
 Creator(s):
Affiliations:
Publ. Info: Les Ulis Cedex A France : EDP Sciences
Pages: - Volume / Issue: 644 Sequence Number: A130 Start / End Page: - Identifier: ISSN: 1432-0746
ISSN: 0004-6361
CoNE: https://pure.mpg.de/cone/journals/resource/954922828219_1