Optical Constants of Ices Important to Planetary Science From Laboratory Reflectance Spectroscopy

Tegler, S.C. and Grundy, W.M. and Loeffler, M.J. and Tribbett, P.D. and Hanley, J. and Jasko, A.V. and Dawson, H. and Morgan, A.N. and Koga, K.J. and Madden-Watson, A.O. and Gomez, M.D. and Steckloff, J.K. and Lindberg, G.E. and Tan, S.P. and Raposa, S.M. and Engle, A.E. and Thieberger, C.L. and Trilling, D.E. Optical Constants of Ices Important to Planetary Science From Laboratory Reflectance Spectroscopy. Planetary Science Journal. ISSN 2632-3338 (Submitted)

Preview	Text (This manuscript was accepted by the Planetary Science Journal) Tegler et al_2024.pdf - Accepted Version Download (876kB) | Preview
	Archive (The file contains experimental absorbance data, python code for extracting optical constants from absorbance data, and optical constants for CH4 and H2O Ices) OpticalConstantData.zip - Submitted Version Download (1MB)

Abstract

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.

Item Type:	Article
Subjects:	Q Science > QB Astronomy Q Science > QC Physics
NAU Depositing Author Academic Status:	Faculty/Staff
Department/Unit:	College of the Environment, Forestry, and Natural Sciences > Physics and Astronomy
Date Deposited:	18 Dec 2023 19:52
Last Modified:	18 Dec 2023 20:08
URI:	https://openknowledge.nau.edu/id/eprint/6250

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• Optical Constants of Ices Important to Planetary Science From Laboratory Reflectance Spectroscopy. (deposited 08 Dec 2023 20:50)
  • Optical Constants of Ices Important to Planetary Science From Laboratory Reflectance Spectroscopy. (deposited 18 Dec 2023 19:52) [Currently Displayed]

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