تقرير
Solar wind reflection from the lunar surface: The view from far and near
| العنوان: | Solar wind reflection from the lunar surface: The view from far and near |
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| المؤلفون: | Saul, L., Wurz, P., Vorburger, A., M., D. F. Rodríguez, Fuselier, S. A., McComas, D. J., Möbius, E., Barabash, S., Funsten, Herb, Janzen, Paul |
| سنة النشر: | 2013 |
| المجموعة: | Astrophysics |
| مصطلحات موضوعية: | Astrophysics - Earth and Planetary Astrophysics |
| الوصف: | The Moon appears bright in the sky as a source of energetic neutral atoms (ENAs). These ENAs have recently been imaged over a broad energy range both from near the lunar surface, by India's Chandrayaan-1 mission (CH-1), and from a much more distant Earth orbit by NASA's Interstellar Boundary Explorer (IBEX) satellite. Both sets of observations have indicated that a relatively large fraction of the solar wind is reflected from the Moon as energetic neutral hydrogen. CH-1's angular resolution over different viewing angles of the lunar surface has enabled measurement of the emission as a function of angle. IBEX in contrast views not just a swath but a whole quadrant of the Moon as effectively a single pixel, as it subtends even at the closest approach no more than a few degrees on the sky. Here we use the scattering function measured by CH-1 to model global lunar ENA emission and combine these with IBEX observations. The deduced global reflection is modestly larger (by a factor of 1.25) when the angular scattering function is included. This provides a slightly updated IBEX estimate of AH = 0.11 +/- 0.06 for the global neutralized albedo, which is 25 % larger than the previous values of 0.09 +/- 0.05, based on an assumed uniform scattering distribution. Comment: This is a preprint. Please see Planetary and Space Sciences for published version, Available online 27 February 2013 |
| نوع الوثيقة: | Working Paper |
| DOI: | 10.1016/j.pss.2013.02.004 |
| URL الوصول: | http://arxiv.org/abs/1306.3675 |
| رقم الأكسشن: | edsarx.1306.3675 |
| قاعدة البيانات: | arXiv |
| DOI: | 10.1016/j.pss.2013.02.004 |
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