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  Revisiting the formation mechanism for coronal rain from previous studies

Li, L.-P., Peter, H., Chitta, L. P., & Song, H.-Q. (2021). Revisiting the formation mechanism for coronal rain from previous studies. Research in Astronomy and Astrophysics, 21(10): 255. doi:10.1088/1674-4527/21/10/255.

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 Creators:
Li, Le-Ping, Author
Peter, Hardi1, Author           
Chitta, L. P.1, Author           
Song, Hong-Qiang, Author
Affiliations:
1Department Sun and Heliosphere, Max Planck Institute for Solar System Research, Max Planck Society, ou_1832289              

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 Abstract: Solar coronal rain is classified generally into two categories: flare-driven and quiescent coronal rain. Th latter is observed to form along both closed and open magnetic field structures. Recently, we proposed that some of the quiescent coronal rain events, detected in the transition region and chromospheric diagnostics, along loop-like paths could be explained by the formation mechanism for quiescent coronal rain facilitated by interchange magnetic reconnection between open and closed field lines. In this study, we revisited 38 coronal rain reports from the literature. From theseearlier works, we picked 15 quiescent coronal rain events out of the solar limb, mostly suggested to occur in active region closed loops due to thermal nonequilibrium, to scrutinize their formation mechanism. Employing the extreme ultraviolet images and line-of-sight magnetograms, the evolution of the quiescent coronal rain events and their magnetic fields and context coronal structures is examined. We find that six, comprising 40%, of the 15 quiescent coronal rain events could be totally or partially interpreted by the formation mechanism for quiescent coronal rain along open structures facilitated by interchange reconnection. The results suggest that the quiescent coronal rain facilitated by interchange reconnection between open and closed field lines deserves more attention.

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Language(s): eng - English
 Dates: 2021
 Publication Status: Published online
 Pages: -
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 Table of Contents: -
 Rev. Type: Peer
 Identifiers: DOI: 10.1088/1674-4527/21/10/255
 Degree: -

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Title: Research in Astronomy and Astrophysics
Source Genre: Journal
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Publ. Info: Institute of Physics Publishing (IOP)
Pages: - Volume / Issue: 21 (10) Sequence Number: 255 Start / End Page: - Identifier: ISSN: 1674-4527
CoNE: https://pure.mpg.de/cone/journals/resource/1674-4527