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Noise storm continua: power estimates for electron acceleration View all abstracts by submitter

Prasad Subramanian   Submitted: 2004-08-26 10:03

We use a generic stochastic acceleration formalism to examine the power L m in ({ m erg,s-1}) input to nonthermal electrons that cause noise storm continuum emission. The analytical approach includes the derivation of the Green's function for a general second-order Fermi process, and its application to obtain the particular solution for the nonthermal electron distribution resulting from the acceleration of a Maxwellian source in the corona. We compare L m in with the power L m out observed in noise storm radiation. Using typical values for the various parameters, we find that L m in sim 1023-26 { m erg,s-1}, yielding an efficiency estimate eta equiv L m out/L m in in the range 10-10 lsim eta lsim 10-6 for this nonthermal acceleration/radiation process. These results reflect the efficiency of the overall process, starting from electron acceleration and culminating in the observed noise storm emission.

Authors: Prasad Subramanian, Peter A. Becker
Projects: None

Publication Status: Accepted for publication in Solar Physics
Last Modified: 2004-08-26 10:03
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