Comparison of Laboratory Emission Spectra with Mercury Telescopic Data
Comparison of Laboratory Emission Spectra with Mercury Telescopic Data
复制标题
实验室发射光谱与水星望远镜数据的比较
DOI：
10.1006/icar.1998.5929
复制
发表时间：
1998
期刊：
影响因子：
3.2
通讯作者：
T. Roush
中科院分区：
文献类型：
--
作者：
A. Sprague;T. Roush
摘要将水星表面四个位置的热发射光谱与三种新的实验室发射光谱进行了比较：两种尖晶石（锌尖晶石和磁铁矿）和一种碳质球粒陨石（阿连德）。矿物和陨石的选择是为了调查以前提出的水星表面演变的独特情景。没有相似的汞的数据被认为是测量的发射光谱。我们还比较了汞光谱选择的反反射光谱的斜晶石，斜晶石，阿波罗16号月球角砾岩，霞石含碱正长岩，和简单的双组分线性混合的斜晶石和辉石。从水星经度和赤道纬度40°和45°附近的中心位置获得的水星光谱在8到10 μm之间呈向上凹的形状，就像霞石一样，但数据的发射率最大值出现在比任何一种霞石（霞石，白榴石，方钠石）更短的波长处。含霞石的碱性正长岩提供了一个很好的匹配的波长位置的汞的发射率最大值。通过与斜长石系列中的几种斜长晶石、斜长石和辉石月球角砾岩（67031和67455）以及斜长石和辉石的线性混合模型的比较，可以很好地匹配水星经度120°和134 °以及赤道纬度附近的一些特征。更确切地解释这些数据从水星需要实验室研究的发射光谱获得专门的热和日照条件下适合于无空气的机构。
Abstract Thermal emission spectra from four locations on Mercury's surface are compared with three new laboratory emission spectra: two spinels (gahnite and magnetite) and one carbonaceous chondrite (Allende). The mineral and meteorite choices were made to investigate previously suggested unique scenarios for the evolution of Mercury's surface. No resemblance of the Mercury data were seen to the measured emission spectra. We also compare Mercury spectra to a selection of inverted reflectance spectra of feldspars, feldspathoids, Apollo 16 lunar breccias, nepheline-bearing alkali syenite, and simple two-component linear mixes of feldspars and pyroxenes. The Mercury spectra obtained from locations centered near 40° and 45° mercurian longitude and equatorial latitudes are concave upward in shape between 8 and 10 μm like that of nepheline but the emissivity maxima of the data occur at shorter wavelength than any of the feldspathoids (nepheline, leucite, sodalite). A good match of the wavelength position of Mercury's emissivity maxima is provided by the nepheline-bearing alkali syenite. Comparisons to several feldspars in the plagioclase series, and plagioclase and pyroxene lunar breccia (67031 and 67455), and linear mixing models of plagioclase and pyroxene provide good matches to some features near ∼120° and ∼34° mercurian longitude and equatorial latitudes. More conclusive interpretation of these data from Mercury requires laboratory studies of emission spectra obtained specifically for thermal and insolation conditions appropriate for airless bodies.