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Generation Mechanisms of Quasi-parallel and Quasi-circular Flare Ribbons in a Confined Flare
Hernandez-Perez, Aaron1; Thalmann, Julia K.1; Veronig, Astrid M.1; Su, Yang2; Gomory, Peter3; Dickson, Ewan C.1
2017-10-01
Source PublicationASTROPHYSICAL JOURNAL
ISSN0004-637X
Volume847Issue:2Pages:14
Corresponding AuthorHernandez-Perez, Aaron(aaron.hernandez-perez@uni-graz.at)
AbstractWe analyze a confined multiple-ribbon M2.1 flare (SOL2015-01-29T11:42) that originated from a fan-spine coronal magnetic field configuration, within active region NOAA 12268. The observed ribbons form in two steps. First, two primary ribbons form at the main flare site, followed by the formation of secondary ribbons at remote locations. We observe a number of plasma flows at extreme-ultraviolet temperatures during the early phase of the flare (as early as 15 minutes before the onset) propagating toward the formation site of the secondary ribbons. The secondary ribbon formation is co-temporal with the arrival of the pre-flare generated plasma flows. The primary ribbons are co-spatial with Ramaty High Energy Spectroscopic Imager (RHESSI) hard X-ray sources, whereas no enhanced X-ray emission is detected at the secondary ribbon sites. The (E)UV emission, associated with the secondary ribbons, peaks similar to 1 minute after the last RHESSI hard X-ray enhancement. A nonlinear force-free model of the coronal magnetic field reveals that the secondary flare ribbons are not directly connected to the primary ribbons, but to regions nearby. Detailed analysis suggests that the secondary brightenings are produced due to dissipation of kinetic energy of the plasma flows (heating due to compression), and not due to non-thermal particles accelerated by magnetic reconnection, as is the case for the primary ribbons.
KeywordSun: corona Sun: flares Sun: magnetic fields Sun: X-rays, gamma-rays
DOI10.3847/1538-4357/aa8814
WOS KeywordCORONAL MASS EJECTIONS ; X-RAY OBSERVATIONS ; SOLAR-FLARES ; MAGNETIC RECONNECTION ; ACTIVE-REGION ; RHESSI ; MODEL ; BREMSSTRAHLUNG ; DISTRIBUTIONS ; PROMINENCES
Indexed BySCI
Language英语
WOS Research AreaAstronomy & Astrophysics
WOS SubjectAstronomy & Astrophysics
WOS IDWOS:000416699000015
PublisherIOP PUBLISHING LTD
Citation statistics
Cited Times:11[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/18215
Collection中国科学院紫金山天文台
Corresponding AuthorHernandez-Perez, Aaron
Affiliation1.Graz Univ, Inst Phys, IGAM, A-8010 Graz, Austria
2.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China
3.Slovak Acad Sci, Astron Inst, Tatranska Lomnica 05960, Slovakia
Recommended Citation
GB/T 7714
Hernandez-Perez, Aaron,Thalmann, Julia K.,Veronig, Astrid M.,et al. Generation Mechanisms of Quasi-parallel and Quasi-circular Flare Ribbons in a Confined Flare[J]. ASTROPHYSICAL JOURNAL,2017,847(2):14.
APA Hernandez-Perez, Aaron,Thalmann, Julia K.,Veronig, Astrid M.,Su, Yang,Gomory, Peter,&Dickson, Ewan C..(2017).Generation Mechanisms of Quasi-parallel and Quasi-circular Flare Ribbons in a Confined Flare.ASTROPHYSICAL JOURNAL,847(2),14.
MLA Hernandez-Perez, Aaron,et al."Generation Mechanisms of Quasi-parallel and Quasi-circular Flare Ribbons in a Confined Flare".ASTROPHYSICAL JOURNAL 847.2(2017):14.
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