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Magnetic reconnection, electric field, and particle acceleration in the July 14, 2000 solar flare

Content Provider	Springer Nature Link
Author	Somov, B. V. Oreshina, I. V. Kovalenko, I. A.
Copyright Year	2008
Abstract	A topological model with magnetic reconnection at two separators in the corona is used to account for the recently discovered changes of the photospheric magnetic field in the active region NOAA 9077 during the July 14, 2000 flare. The model self-consistently explains the following observed effects: (1) the magnetic field strength decreases on the periphery of the active region but increases in its inner part near the neutral line of the photospheric magnetic field; (2) the center-of-mass positions of the fields of opposite (northern and southern) polarities converge; and (3) the magnetic flux of the active region decreases after the flare. The topological model gives not only a qualitative interpretation of the flare phenomena (the structure of the interacting magnetic fluxes in the corona, the location of the energy sources, the shape of the flare ribbons and kernels in the chromosphere and photosphere), but also correct quantitative estimates of the large-scale processes that form the basis for solar flares. The electric field emerging in the flare during large-scale reconnection is calculated. The electric field strength correlates with the observed intensity of the hard X-ray bremsstrahlung, suggesting an electron acceleration as a result of reconnection.
Starting Page	327
Ending Page	336
Page Count	10
File Format	PDF
ISSN	10637737
Journal	Astronomy Letters
Volume Number	34
Issue Number	5
e-ISSN	15626873
Language	English
Publisher	SP MAIK Nauka/Interperiodica
Publisher Date	2008-05-14
Publisher Place	Dordrecht
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Magnetic reconnection Magnetostatics; magnetic shielding, magnetic induction, boundary-value problems Function theory, analysis Special functions Sun solar flares magnetic field magnetic reconnection Astrophysics Astronomy
Content Type	Text
Resource Type	Article
Subject	Astronomy and Astrophysics Space and Planetary Science

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