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Spatially Resolved Observations of Europa’s Surface with Subaru/IRCS at 1.0–1.8 μm: Upper Limits to the Abundances of Hydrated Cl-bearing Salts

  • Authors: Shuya Tan, Yasuhito Sekine, and Masayuki Kuzuhara

2022 The Planetary Science Journal 3 70.

  • Provider: AAS Journals

Caption: Figure 9.

Results of our analysis of the noise level of the reflectance spectra at wavelengths of 1.150–1.255 μm. The observed areas on Europa are shown in the top insets. Close-up view of the reflectance spectra fitted by polynomial regression lines of a cubic function at (a) 111° ± 25°W, 38° ± 16°S, (b) 160° ± 9°W, 3° ± 15°N, and (c) 256° ± 5°W, 15° ± 14°N. Differences between the reflectance and polynomial regression lines of the reflectance as a function of wavelength at (d) 111° ± 25°W, 38° ± 16°S, (e) 160° ± 9°W, 3° ± 15°N, and (f) 256° ± 5°W, 15° ± 14°N. The 1σ noise levels are calculated at 1.79 × 10−3, 2.39 × 10−3, and 3.04 × 10−3, respectively.

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