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H-ALPHA FILTERGRAM OBSERVATIONS OF ELLERMAN BOMBS AND ITS MAGNETIC RECONNECTION MODEL
HU, FM ; SONG, MT ; LI, XQ
1995
Source PublicationASTROPHYSICS AND SPACE SCIENCE
ISSN0004-640X
Volume229Issue:2Pages:325—339
AbstractFrom the H-alpha filtergram observations obtained at Ganyu station, identification and statistic works made for Ellerman bombs, it is found that they often occur in the superpenumbra area of a mature sunspot. We suggest a plasmoid model to account for the basic properties of a typical bomb: lifetime 11 min, diameter similar to 5 x 10(7) cm, accompanying jet velocity similar to 40 km/s, total energy similar to 10(27) erg, Te similar to 10(4) K. First, a numerical simulation is made to prove that plasmoids can be lifted from the solar convective zone by magnetic buoyancy. Between the plasmoid and its surroundings a strong current sheet builds up in which a peculiar MHD (with plasma ponderamotive force) - resistive instability takes place. After the magnetic reconnection has begun, a local explosive instability ensues whose growth rate is so high that it allows the exhaustion of the 'high temperature' particles from the sheet in a short period. In this way, the temperature of a bomb may be kept unchanged or only rise slightly.
Subject Area天文和天体物理
Document Type期刊论文
Identifierhttp://libir.pmo.ac.cn/handle/332002/8488
Collection期刊(老文献)
Recommended Citation
GB/T 7714
HU, FM,SONG, MT,LI, XQ. H-ALPHA FILTERGRAM OBSERVATIONS OF ELLERMAN BOMBS AND ITS MAGNETIC RECONNECTION MODEL[J]. ASTROPHYSICS AND SPACE SCIENCE,1995,229(2):325—339.
APA HU, FM,SONG, MT,&LI, XQ.(1995).H-ALPHA FILTERGRAM OBSERVATIONS OF ELLERMAN BOMBS AND ITS MAGNETIC RECONNECTION MODEL.ASTROPHYSICS AND SPACE SCIENCE,229(2),325—339.
MLA HU, FM,et al."H-ALPHA FILTERGRAM OBSERVATIONS OF ELLERMAN BOMBS AND ITS MAGNETIC RECONNECTION MODEL".ASTROPHYSICS AND SPACE SCIENCE 229.2(1995):325—339.
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