Computational methods for infrared spectroscopy of airless planetary bodies

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dc.contributor.advisorWöhler, Christian
dc.contributor.authorWohlfarth, Kay Stephan
dc.contributor.refereePauli, Josef
dc.date.accepted2025-04-09
dc.date.accessioned2025-06-18T06:00:53Z
dc.date.available2025-06-18T06:00:53Z
dc.date.issued2025
dc.description.abstractThis thesis presents three computational models to analyze the infrared spectra of airless planetary bodies like the Moon, Mercury, and the exoplanet LHS 3844b. These models aid in studying their mineral composition, hydration pattern, and thermophysical properties, ultimately helping to understand these remote worlds. First, the author developed a thermal model that simulates the radiance emerging from airless planetary bodies. Validation with lunar infrared measurements acquired by the Gaofen-4 weather satellite and the Diviner lunar radiometer showed excellent agreement. Reprocessing the model with different bolometric hemispherical emissivities yielded similar fitting results with slightly more realistic parameter estimates. The model allows analyzing Moon Mineralogy Mapper data for understanding the lunar hydration pattern, calibrating MERTIS (BepiColombo) data for mineralogical analysis of Mercury, and analyzing phase curves of the airless exoplanet LHS3844b measured with the James Webb Space Telescope. The model is also suited for data from future missions, such as the Lunar Trailblazer, and calibration of earth satellites, such as the Forest-2/3 satellite series of Ororatech. The second contribution is a model that simulates the spectral effects of space weathering, combining light scattering theory with the Hapke reflectance model. The model helps to analyze lunar hydration and mineralogy and photometric phenomena like lunar swirls. Inter-particle interactions show that closely packed iron particles cause spectral darkening, which was previously thought to be caused only by larger iron particles. Third, the author re-examined previous telescopic studies of planet Mercury that found a correlation between the spectral slope of Mercury and the emission angle. It was found that wavelength-dependent atmospheric distortions explain these alleged correlations, challenging earlier interpretations.en
dc.identifier.urihttp://hdl.handle.net/2003/43756
dc.identifier.urihttp://dx.doi.org/10.17877/DE290R-25530
dc.language.isoen
dc.subjectMondde
dc.subjectMerkurde
dc.subjectInfrarotspektroskopiede
dc.subjectPlanetologiede
dc.subjectThermische Modellierungde
dc.subjectNumerische Modellierungde
dc.subjectSatellitende
dc.subjectSonnensystemde
dc.subject.ddc620
dc.subject.rswkInfrarotspektroskopiede
dc.subject.rswkPlanetologiede
dc.titleComputational methods for infrared spectroscopy of airless planetary bodiesen
dc.typeText
dc.type.publicationtypePhDThesis
dcterms.accessRightsopen access
eldorado.secondarypublicationfalse

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