| Автор | Cairns, I. H. |
| Автор | Melrose, D. B. |
| Дата выпуска | 1985 |
| dc.description | A theory for the radiation at the second harmonic of the plasma frequency f<sub>p</sub> observed near the earth's bow shock is advanced in which the dominant plasma emission mechanisms are the processes L + L ± S→t, proceeding in two three‐wave steps, L ± S→L′ and L + L′→t, where L, S, and t denote Langmuir, ion sound, and electromagnetic waves, respectively. This theory receives strong observational support from the correct prediction of the existence and frequencies of a class of low‐frequency ion‐sound‐like waves associated with Langmuir waves in the earth's foreshock. Three predictions of the theory which may be suitable for observational testing are stated. The observed brightness temperature of the 2f<sub>p</sub> source is calculated to be of the order of 10<sup>11</sup> K. It is shown that Fung et al.'s (1982) theory cannot explain either the 2f<sub>p</sub> radiation due to an intrinsic brightness temperature limit of 3×10<sup>9</sup> K for their model or the observed levels of Langmuir waves in the foreshock region. |
| Формат | application.pdf |
| Копирайт | Copyright 1985 by the American Geophysical Union. |
| Тема | INTERPLANETARY PHYSICS |
| Тема | Planetary bow shocks |
| Тема | Plasma waves and turbulence |
| Тема | SPACE PLASMA PHYSICS |
| Тема | Radiation processes |
| Тема | Wave/wave interactions |
| Название | A theory for the 2f<sub>p</sub> radiation upstream of the Earth's bow shock |
| Тип | shortCommunication |
| DOI | 10.1029/JA090iA07p06637 |
| Electronic ISSN | 2156-2202 |
| Print ISSN | 0148-0227 |
| Журнал | Journal of Geophysical Research: Space Physics |
| Том | 90 |
| Первая страница | 6637 |
| Последняя страница | 6640 |
| Выпуск | A7 |
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