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Remote flare brightenings and type III reverse slope burstsObservations are presented on two large (H-alpha class 2) flares that each produced an extensive chain of discrete H-alpha brightenings spanning 370,000-470,000 km in length in remote quiet regions more than 100,000 km from the main flare site. A large group of Type III RS bursts was also observed accompanying each flare. The onset of about half the remote H-alpha emission patches were nearly simultaneous with the RS bursts. One flare was observed in hard X-rays, and it is noted that the RS bursts occurred during hard X-ray spikes. For the other flare, soft X-ray filtergrams indicate coronal loops connecting from the main flare site to the remote H-alpha brightenings. Observations indicate that the RS burst electrons were generated in the flares, and it is proposed that the remote H-alpha brightenings were initiated by direct heating of the chromosphere by RS burst electrons traveling in closed magnetic loops connecting the flare site to the remote patches. It is also suggested that after onset, the brightenings were heated by thermal conduction by slower thermal electrons.
Document ID
19820048709
Acquisition Source
Legacy CDMS
Document Type
Reprint (Version printed in journal)
External Source(s)
Authors
Tang, F.
(Hale Observatories Pasadena, CA, United States)
Moore, R. L.
(Big Bear Solar Observatory Pasadena, CA, United States)
Date Acquired
August 10, 2013
Publication Date
April 1, 1982
Publication Information
Publication: Solar Physics
Volume: 77
Subject Category
Solar Physics
Accession Number
82A32244
Funding Number(s)
CONTRACT_GRANT: NGL-05-002-034
CONTRACT_GRANT: NAGW-27
CONTRACT_GRANT: NOAA-NA80RAC0002
CONTRACT_GRANT: F19628-77-C-0106
Distribution Limits
Public
Copyright
Other

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