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Study of flare energy release using events with numerous type III-like bursts in microwaves View all abstracts by submitter

Natalia Meshalkina   Submitted: 2012-06-19 18:15

The analysis of narrowband drifting of type III-like structures in radio bursts dynamic spectra allows to obtain unique information about primary energy release mechanisms in solar flares. The SSRT spatially resolved images and a high spectral and temporal resolution allow direct determination not only the positions of its sources but also the exciter velocities along the flare loop. Practically, such measurements are possible during some special time intervals when the SSRT (about 5.7 GHz) is observing the flare region in two high-order fringes; thus, two 1D scans are recorded simultaneously at two frequency bands. The analysis of type III-like bursts recorded during the flare 14 Apr 2002 is presented. Using-muliwavelength radio observations recorded by SSRT, SBRS, NoRP, RSTN we study an event with series of several tens of drifting microwave pulses with drift rates in the range from -7 to 13 GHz/s. The sources of the fast-drifting bursts were located near the top of the flare loop in a volume of a few Mm in size. The slow drift of the exciters along the flare loop suggests a high pitch-anisotropy of the emitting electrons.

Authors: N. S. Meshalkina, A. T. Altyntsev, D. A. Zhdanov, S. V. Lesovoi, A. A. Kochanov, Yan Yihua, Tan Chengming
Projects: None

Publication Status: Solar Physics, in press
Last Modified: 2012-06-20 12:11
Go to main E-Print page  Lagrangian coherent structures in photospheric flows and their implications for coronal magnetic structure  Properties of the Acceleration Regions in Several Loop-structured Solar Flares  Edit Entry  Download Preprint  Delete Entry 

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