Spectral analysis of lunar swirls using the data from Spectral Profiler onboard SELENE/Kaguya

Details Spectral analysis of lunar swirls using the data from Spectral Profiler onboard SELENE/Kaguya Spectral analysis of lunar swirls using the data from Spectral Profiler onboard SELENE/Kaguya

Dec 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011agufm.p13d1702o&link_type=abstract

American Geophysical Union, Fall Meeting 2011, abstract #P13D-1702

Physics

[5410] Planetary Sciences: Solid Surface Planets / Composition, [5415] Planetary Sciences: Solid Surface Planets / Erosion And Weathering, [5464] Planetary Sciences: Solid Surface Planets / Remote Sensing, [5470] Planetary Sciences: Solid Surface Planets / Surface Materials And Properties

Scientific paper

Space weathering causes the change in optical properties, such as darkening, reddening, and decrease of absorption depths of the planetary surfaces. Two competing processes have been proposed so far as the main mechanism of such space weathering; hydrogen irradiation by solar wind and bombardment of micrometeorites [1] [2]. We used the new data set obtained by Spectral Profiler (SP) onboard SELENE/Kaguya which observed the Moon and investigated the optical properties of the representative lunar swirls. We searched for any systematic relationship between the albedo and the maturity, which are represented by the (1) reflectance at 0.75 micron (r0.75) and slopes of the fitted continua or (2) r0.75 and depth/strength of absorption band of 1 micron and 1.3 micron, respectively. Based on the results of our spectral analyses including MGM (Modified Gaussian Model [3]), we try to approach the actual process of space weathering on the Moon. [1] Vernazza, P., Binzel, R. P., Rossi, A., Fulchignoni. M. and Birlan, M., Solar wind as the origin of rapid reddening of asteroid surfaces, Nature, 458, 993-995, doi:10.1038/nature07956, 2009. [2] Sasaki, S., Nakamura, K., Hamabe, Y., Kurahashi, E. & Hiroi, T., Production of iron nanoparticles by laser irradiation in a simulation of lunar-like space weathering, Nature. 410, 555-557, 2001. [3] Sunshine, J. M., Pieters, C. M. & Pratt, S. F., Deconvolution of Mineral Absorption Bands: An Improved Approach, J. Geophys. Res., 95, 6955-6966, 1990.

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