CHANGES IN SUNSPOT AND FLOCCULAR SOURCES OF RADIO-EMISSION PRECEDING AN IMPORTANCE 2N FLARE ON 23 AUGUST 1988

Citation
Bv. Agalakov et al., CHANGES IN SUNSPOT AND FLOCCULAR SOURCES OF RADIO-EMISSION PRECEDING AN IMPORTANCE 2N FLARE ON 23 AUGUST 1988, Solar physics, 173(2), 1997, pp. 305-318
Citations number
14
Categorie Soggetti
Astronomy & Astrophysics
Journal title
ISSN journal
00380938
Volume
173
Issue
2
Year of publication
1997
Pages
305 - 318
Database
ISI
SICI code
0038-0938(1997)173:2<305:CISAFS>2.0.ZU;2-P
Abstract
Based on observations from the Siberian solar radio telescope, and inv oking data from other observatories, we investigate preflare changes i n the sunspot and floccular sources of radio emission and the developm ent of an importance 2N Bare in the chromosphere and corona in the act ive region on August 23, 1988. It has been ascertained that preflare c hanges became observable six hours prior to the Bare onset and manifes ted themselves in intense flux Fluctuations above the sunspot and in a n enhancement of the source emission flux above the flocculus. It is s hown that the flare onset is associated with a newly emerged magnetic flux in the form of a pore near the filament and with the appearance o f radio sources above the filament. The flare was accompanied by type III radio bursts and a noise storm at meter wavelengths. Coronal mass ejection parameters are estimated from type III burst observations.