First optical observation of the moon's sodium exosphere from the lunar orbiter SELENE (Kaguya)

M. Kagitani, M. Taguchi, A. Yamazaki, I. Yoshikawa, G. Murakami, K. Yoshioka, S. Kameda, F. Ezawa, T. Toyota, Shouichi Okano

研究成果: Article

8 引用 (Scopus)

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The first successful observations of resonant scattering emission from the lunar sodium exosphere were made from the lunar orbiter SELENE (Kaguya) using TVIS instruments during the period 17-19 December, 2008. The emission intensity of the NaD-line decreased by 12±6%, with an average value of 5.4 kR (kilorayleighs) in this period, which was preceded, by 1 day, by enhancement of the solar proton flux associated with a corotating interaction region. The results suggest that solar wind particles foster the diffusion of sodium atoms or ions in the lunar regolith up to the surface and that the time scale of the diffusion is a few tens of hours. The declining activity of the Geminid meteor shower is also one possible explanation for the decreasing sodium exosphere.

元の言語English
ページ(範囲)1025-1029
ページ数5
ジャーナルearth, planets and space
61
発行部数8
DOI
出版物ステータスPublished - 2009

ASJC Scopus subject areas

  • Geology
  • Space and Planetary Science

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    Kagitani, M., Taguchi, M., Yamazaki, A., Yoshikawa, I., Murakami, G., Yoshioka, K., Kameda, S., Ezawa, F., Toyota, T., & Okano, S. (2009). First optical observation of the moon's sodium exosphere from the lunar orbiter SELENE (Kaguya). earth, planets and space, 61(8), 1025-1029. https://doi.org/10.1186/BF03352953