Optical Constants of Ices Important to Planetary Science from Laboratory Reflectance Spectroscopy
Optical Constants of Ices Important to Planetary Science from Laboratory Reflectance Spectroscopy
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DOI：
10.3847/psj/ad1683
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发表时间：
2024-02
影响因子：
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通讯作者：
S. Tegler;W. Grundy;M. J. Loeffler;P. Tribbett;J. Hanley;A. V. Jasko;H. Dawson;A. Morgan;K. Koga;A. O. Madden-Watson;M. D. Gomez;J. Steckloff;G. E. Lindberg;S. P. Tan;S. M. Raposa;A. Engle;C. L. Thieberger;D. Trilling
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文献类型：
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作者：
S. Tegler;W. Grundy;M. J. Loeffler;P. Tribbett;J. Hanley;A. V. Jasko;H. Dawson;A. Morgan;K. Koga;A. O. Madden-Watson;M. D. Gomez;J. Steckloff;G. E. Lindberg;S. P. Tan;S. M. Raposa;A. Engle;C. L. Thieberger;D. Trilling
天文学推导的光学常数对于确定冰和测量太阳系物体上冰的相对丰度至关重要。几乎所有对行星科学重要的冰的光学常数都来自透射几何实验。在这里，我们描述了我们的新的实验装置和修改的迭代算法在文献中测量的光学常数的冰从实验反射几何形状。我们将我们的技术应用于CH4冰和H2O冰样品，并发现我们的值和文献中的值之间的良好的一致性，除了一个CH4频带在文献中，可能遭受饱和。我们在这里提出的工作表明，反射几何实验室可以产生光学常数，如詹姆斯韦伯太空望远镜获得的近红外和中红外光谱的外太阳系天体的正确分析必不可少。
Laboratory-derived optical constants are essential for identifying ices and measuring their relative abundances on solar system objects. Almost all optical constants of ices important to planetary science come from experiments with transmission geometries. Here we describe our new experimental setup and the modification of an iterative algorithm in the literature to measure the optical constants of ices from experiments with reflectance geometries. We apply our techniques to CH4 ice and H2O ice samples and find good agreement between our values and those in the literature, except for one CH4 band in the literature that likely suffers from saturation. The work we present here demonstrates that labs with reflectance geometries can generate optical constants essential for the proper analysis of near- and mid-infrared spectra of outer solar system objects such as those obtained with the James Webb Space Telescope.