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- Title
Further Constraints on Electron Acceleration in Solar Noise Storms.
- Authors
Subramanian, Prasad; Becker, Peter A.
- Abstract
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 and 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.
- Subjects
SOLAR activity; SOLAR wind; SOLAR radio emission; ELECTRON accelerators; PARTICLES (Nuclear physics)
- Publication
Solar Physics, 2006, Vol 237, Issue 1, p185
- ISSN
0038-0938
- Publication type
Article
- DOI
10.1007/s11207-006-0084-7