论文标题
如黎明/vir所示，（1）Cere的表面（1）谷神星的表面
The surface of (1) Ceres in visible light as seen by Dawn/VIR
论文作者
论文摘要
如可见的和红外映射光谱仪（VIR）在黎明航天器上观察到的，我们在可见波长处研究了CERES的表面，并分析了整个表面上各种光谱参数的变化。我们还专注于这个矮星球表面的几个值得注意的区域。我们利用了新校正的ViR可见数据来在550 nm处构建校准辐射因子的全局图，两种颜色复合材料和三个光谱斜率在400至950 nm之间。我们已经通过Aladin桌面软件为社区提供了这些地图。 Ceres表面在可见范围内显示出不同的光谱行为。 480和800 nm之间的颜色复合板和光谱斜率突出了新鲜的冲击火山口和内源性起源的年轻地质形成，它们看起来比其余的表面更蓝。 465 nm之前的陡坡显示非常不同的变化，并且可能是由$ o_2^{ - } $ - > $ fe^{3+} $或$ 2fe^{3+} $ - > $ fe^{2+} {2+} {2+}+fe^{2+}+fe^{4+} $电荷的范围（如果在lateptrant中找到lesters proppers propped propped propped propped propped proppert），则可能是$ o_2^{ - } $ - > $ fe^{3+} $引起的吸收。我们注意到，光谱斜率与VIR在红外发现的大量岩丝硅之间的几个相似之处，而与碳酸盐物种无法明确建立相关性。 Dantu撞击火山口区域表现出特殊的光谱行为（尤其是通过465 nm之前的颜色和光谱斜率），表明组成或表面物理特性的变化，而在Cere上其他地方没有观察到的表面物理特性。
We study the surface of Ceres at visible wavelengths, as observed by the Visible and InfraRed mapping spectrometer (VIR) onboard the Dawn spacecraft, and analyze the variations of various spectral parameters across the whole surface. We also focus on several noteworthy areas of the surface of this dwarf planet. We made use of the newly corrected VIR visible data to build global maps of a calibrated radiance factor at 550 nm, with two color composites and three spectral slopes between 400 and 950 nm. We have made these maps available for the community via the Aladin Desktop software. Ceres surface shows diverse spectral behaviors in the visible range. The color composite and the spectral slope between 480 and 800 nm highlight fresh impact craters and young geologic formations of endogenous origin, which appear bluer than the rest of the surface. The steep slope before 465 nm displays very distinct variations and may be a proxy for the absorptions caused by the $O_2^{-}$ -> $Fe^{3+}$ or the $2Fe^{3+}$ -> $Fe^{2+} + Fe^{4+}$ charge transfer, if the latter are found to be responsible for the drop in this spectral range. We notice several similarities between the spectral slopes and the abundance of phyllosilicates detected in the infrared by the VIR, whereas no correlation can be clearly established with carbonate species. The region of the Dantu impact crater presents a peculiar spectral behavior (especially through the color and the spectral slope before 465 nm) suggesting a change in composition or in the surface physical properties that is not observed elsewhere on Ceres.
