Further constraints on electron acceleration in solar noise storms

Details Further constraints on electron acceleration in solar noise storms Further constraints on electron acceleration in solar noise storms

2006-02-28

arxiv.org/abs/astro-ph/0602612v1

Astronomy and Astrophysics

Astrophysics

Accepted for publication in Solar Physics

Scientific paper

10.1007/s11207-006-0084-7

We reexamine the energetics of nonthermal electron acceleration in solar noise storms. A new result is obtained for the minimum nonthermal electron number density required to produce a Langmuir wave population of sufficient intensity to power the noise storm emission. We combine this constraint with the stochastic electron acceleration formalism developed by Subramanian & Becker (2005) to derive a rigorous estimate for the efficiency of the overall noise storm emission process, beginning with nonthermal electron acceleration and culminating in the observed radiation. We also calculate separate efficiencies for the electron acceleration -- Langmuir wave generation stage and the Langmuir wave -- noise storm production stage. In addition, we obtain a new theoretical estimate for the energy density of the Langmuir waves in noise storm continuum sources.

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