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| Titel |
Statistical analysis of monochromatic whistler waves near the Moon detected by Kaguya |
| VerfasserIn |
Y. Tsugawa, N. Terada, Y. Katoh, T. Ono, H. Tsunakawa, F. Takahashi, H. Shibuya, H. Shimizu, M. Matsushima |
| Medientyp |
Artikel
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| Sprache |
Englisch
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| ISSN |
0992-7689
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| Digitales Dokument |
URL |
| Erschienen |
In: Annales Geophysicae ; 29, no. 5 ; Nr. 29, no. 5 (2011-05-24), S.889-893 |
| Datensatznummer |
250017023
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| Publikation (Nr.) |
 copernicus.org/angeo-29-889-2011.pdf |
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| Zusammenfassung |
| Observations are presented of monochromatic whistler waves near the Moon
detected by the Lunar Magnetometer (LMAG) on board Kaguya. The waves were
observed as narrowband magnetic fluctuations with frequencies close to 1 Hz,
and were mostly left-hand polarized in the spacecraft frame. We performed a
statistical analysis of the waves to identify the distributions of their
intensity and occurrence. The results indicate that the waves were generated
by the solar wind interaction with lunar crustal magnetic anomalies. The
conditions for observation of the waves strongly depend on the solar zenith
angle (SZA), and a high occurrence rate is recognized in the region of SZA
between 40° to 90° with remarkable north-south and dawn-dusk
asymmetries. We suggest that ion beams reflected by the lunar magnetic
anomalies are a possible source of the waves. |
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