Statistical analysis of monochromatic whistler waves near the Moon detected by Kaguya

Details Statistical analysis of monochromatic whistler waves near the Moon detected by Kaguya Statistical analysis of monochromatic whistler waves near the Moon detected by Kaguya

Publishing date

Dec 2011

URL

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p23d1733t&link_type=abstract

Journals

American Geophysical Union, Fall Meeting 2011, abstract #P23D-1733

Science

Physics

Additional info 3

[6250] Planetary Sciences: Solar System Objects / Moon

Type

Scientific paper

Abstract

Monochromatic whistler waves were detected by the Lunar Magnetometer (LMAG) on board Kaguya near the Moon. The waves were observed as narrowband magnetic fluctuations with frequencies close to 1 Hz, and were mostly left-hand polarized in the spacecraft frame. Although the monochromatic whistler waves near the Moon were also observed by Lunar Prospector [Halekas et al., 2006], the spectral formation mechanism and the generation process of the waves have not been fully understood. We performed statistical analyses of the waves to identify the properties of the monochromatic whistler waves near the Moon. 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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