Successive Solar Flares and Coronal Mass Ejections on 2005 September 13 from Noaa Ar 10808

Details Successive Solar Flares and Coronal Mass Ejections on 2005 September 13 from Noaa Ar 10808 Successive Solar Flares and Coronal Mass Ejections on 2005 September 13 from Noaa Ar 10808

2009-08-04

arxiv.org/abs/0908.0487v1

Astronomy and Astrophysics

Astrophysics

Solar and Stellar Astrophysics

11 pages, 8 figures, 2 tables, accepted to The Astrophysical Journal

Scientific paper

We present a multiwavelength study of the 2005 September 13 eruption from NOAA 10808 that produced total four flares and two fast coronal mass ejections (CMEs) within 1.5 hours. Our primary attention is paid to the fact that these eruptions occurred in close succession in time, and that all of them were located along an S-shaped magnetic polarity inversion line (PIL) of the active region. In our analysis, (1) the disturbance created by the first flare propagated southward along the PIL to cause a major filament eruption that led to the first CME and the associated second flare underneath. (2) The first CME partially removed the overlying magnetic fields over the northern Delta spot to allow the third flare and the second CME. (3) The ribbon separation during the fourth flare would indicate reclosing of the overlying field lines opened by the second CME. It is thus concluded that this series of flares and CMEs are interrelated to each other via magnetic reconnections between the expanding magnetic structure and the nearby magnetic fields. These results complement previous works made on this event with the suggested causal relationship among the successive eruptions.

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