Evolution of Electric Currents Associated with Two M-Class Flares

Autor:	Guangli Huang, Tuan-Hui Zhou, Baolin Tan, Yu Huang, Qiwu Song, Haisheng Ji
Rok vydání:	2006
Předmět:	Physics Photosphere Solar observatory Solar flare Flux Astronomy Astronomy and Astrophysics Magnetic reconnection Nanoflares law.invention Magnetic field Space and Planetary Science law Flare
Zdroj:	Solar Physics. 239:137-148
ISSN:	1573-093X 0038-0938
Popis:	Using one-minute cadence vector magnetograms from Big Bear Solar Observatory (BBSO), we analyze the temporal behavior of derived longitudinal electric currents associated with two flares on July 26, 2002. One of the events is an M1.0 flare which occurred in active region NOAA 10044, while the other is an M8.7 flare in the adjacent region 10039. Rapid changes of magnetic fields in the form of flux emergence are found to be associated with both of these events. However, the temporal behavior of electric currents are very different. For the M1.0 flare, the longitudinal electric current density drops rapidly near the flaring neutral line; while for the M8.7 flare, the current density rapidly increases, confirming the picture of the current-carrying flux emergence. We offer a possible explanation for such a difference: magnetic reconnection at different heights for the two events, near the photosphere for the M1.0 flare, and higher up for the M8.7 flare.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::cdfdd1ca54fb9f219e3d516b0c33824a https://doi.org/10.1007/s11207-006-0120-7 Zobrazit plný text záznamu Plný text ve formátu PDF