论文标题
吉祥物看到的Ryugu岩石的分光光度分析：寻找碳质软管类似物
Spectrophotometric analysis of the Ryugu rock seen by MASCOT: Searching for a carbonaceous chondrite analog
论文作者
论文摘要
我们分析了吉祥物Lander的摄像机Mascam在Ryugu上获得的一块岩石的图像，目的是识别可能的碳质软管（CC）类似物。岩石的反射率（$ r _ {\ rm f} = 0.034 \ pm 0.003 $在相位角度$ 4.5^\ circ \ pm 0.1^\ circ $）与Ryugu的平均反射率一致，这表明岩石对于此小麻灵是典型的。对岩石包含物的分光光度计分析为CC组成员提供了线索。夹杂物通常比矩阵更明亮。其颜色的主要变化是可见光谱斜率的变化，许多夹杂物是红色或蓝色。红色通道中的光谱变化暗示存在与水合叶状硅酸盐相关的0.7〜$ $ m的吸收带。对于CC而言，夹杂物异常大；我们发现它们的尺寸分布可能最匹配Renazzo（CR2）和Leoville（CV3）陨石的尺寸。 Ryugu岩石不容易适合任何CC组，这与典型的Ryugu型陨石的想法一致，因为陨石太脆弱了，无法在大气中生存。
We analyze images of a rock on Ryugu acquired in situ by MASCam, camera of the MASCOT lander, with the aim of identifying possible carbonaceous chondrite (CC) analogs. The rock's reflectance ($r_{\rm F} = 0.034 \pm 0.003$ at phase angle $4.5^\circ \pm 0.1^\circ$) is consistent with Ryugu's average reflectance, suggesting that the rock is typical for this asteroid. A spectrophotometric analysis of the rock's inclusions provides clues to CC group membership. Inclusions are generally brighter than the matrix. The dominant variation in their color is a change of the visible spectral slope, with many inclusions being either red or blue. Spectral variation in the red channel hints at the presence of the 0.7~$μ$m absorption band linked to hydrated phyllosilicates. The inclusions are unusually large for a CC; we find that their size distribution may best match that of the Renazzo (CR2) and Leoville (CV3) meteorites. The Ryugu rock does not easily fit into any of the CC groups, consistent with the idea that typical Ryugu-type meteorites are too fragile to survive atmospheric entry.
