Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/1754
 Title: Electron acceleration in a post-flare decimetric continuum source Authors: Subramanian, PWhite, S. MKarlický, MSych, RSawant, H. SAnanthakrishnan, S Keywords: acceleration of particles - plasmas - Sun;radio radiation - Sun;corona - Sun: flares Issue Date: Jun-2007 Publisher: EDP Sciences Citation: Astronomy and Astrophysics, Vol. 468, No. 3, pp. 1099 - 1102 Abstract: 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$109 K) 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, Sol. Phys., 237, 185) 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 $3\times 10^$-1026 erg/s. The efficiency of the overall plasma emission process starting from electron acceleration and culminating in the observed emission could range from $2.87\times 10^$ to $2.38 \times 10^$. URI: http://hdl.handle.net/2248/1754 ???metadata.dc.rights???: © The European Southern Observatory ???metadata.dc.relation.uri???: http://dx.doi.org/10.1051/0004-6361:20077341http://arxiv.org/abs/astro-ph/0703612 Appears in Collections: IIAP Publications

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