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Electron acceleration in a post-flare decimetric continuum source View all abstracts by submitter

Prasad Subramanian   Submitted: 2007-03-25 23:04

Aims: To calculate the power budget for electron acceleration and the efficiency of the plasma emission mechanism in a post-flare decimetric continuum source. Methods: We have imaged a high brightness temperature (sim 109K) post-flare source at 1060 MHz with the Giant Metrewave Radio Telescope (GMRT). We use information from these images and the dynamic spectrum from the Hiraiso spectrograph together with the theoretical method described in Subramanian & Becker (2006) to calculate the power input to the electron acceleration process. The method assumes that the electrons are accelerated via a second-order Fermi acceleration mechanism. Results: We find that the power input to the nonthermal electrons is in the range 3 imes 1025-1026 erg/s. The efficiency of the overall plasma emission process starting from electron acceleration and culminating in the observed emission could range from 2.87 imes 10-9 to 2.38 imes 10-8.

Authors: Prasad Subramanian, S. M. White, M. Karlický, R. Sych, H. S. Sawant, S. Ananthakrishnan
Projects: None

Publication Status: Accepted for publication, Astronomy and Astrophysics
Last Modified: 2007-03-26 11:22
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