Kathrin Markus
A5054651870- Astro and Planetary Science
- Isotope Analysis in Ecology
- Planetary Science and Exploration
- Atmospheric Ozone and Climate
- Nuclear Physics and Applications
- Geological and Geochemical Analysis
- Laser-induced spectroscopy and plasma
- Geochemistry and Geologic Mapping
- Chemical Thermodynamics and Molecular Structure
- Astronomical Observations and Instrumentation
- Calibration and Measurement Techniques
- Space Exploration and Technology
- Astronomy and Astrophysical Research
- Spaceflight effects on biology
- Mineralogy and Gemology Studies
- Atmospheric and Environmental Gas Dynamics
University of Münster
2015-2024
Deutsches Zentrum für Luft- und Raumfahrt e. V. (DLR)
2015-2019
Planet
2015-2018
Institut für Lungenforschung
2018
University of Potsdam
2017
Université Paris Cité
2016
Laboratoire d’études spatiales et d’instrumentation en astrophysique
2016
Observatoire de Paris
2016
Centre National de la Recherche Scientifique
2016
Sorbonne Paris Cité
2016
The VIRTIS (Visible, Infrared and Thermal Imaging Spectrometer) instrument on board the Rosetta spacecraft has provided evidence of carbon-bearing compounds nucleus comet 67P/Churyumov-Gerasimenko. very low reflectance (normal albedo 0.060 ± 0.003 at 0.55 micrometers), spectral slopes in visible infrared ranges (5 to 25 1.5 5% kÅ(-1)), broad absorption feature 2.9-to-3.6-micrometer range present across entire illuminated surface are compatible with opaque minerals associated nonvolatile...
Rosetta observes sublimating surface ices Comets are “dirty snowballs” made of ice and dust, but they dark because the sublimates away, leaving some dust behind on surface. The spacecraft has provided a close-up view comet 67P/Churyumov-Gerasimenko as it passes through its closest point to Sun (see Perspective by Dello Russo). Filacchione et al. detected spectral signature solid CO 2 (dry ice) in small patches nucleus emerged from local winter. By modeling how sublimates, constrain...
The reflectance spectra of synthetic oldhamite (CaS), enstatite (Mg2Si2O6), and their mixtures have been studied in the spectral range from 0.3 μm to 16 μm. spectrum is very bright, with a steep slope ultraviolet (UV) an almost neutral visible (VIS) near-infrared (NIR). mid-infrared (MIR) region characterized by Christiansen feature, Reststrahlen bands Transparency feature. shows red UV VIS absorption band at 0.41 has relative depth 11.4%. In MIR, much brighter than several broad bands. show...
VIRTIS aboard ESA's Rosetta mission is a complex imaging spectrometer that combines three unique data channels in one compact instrument to study nucleus and coma of comet 67P/Churyumov-Gerasimenko. Two the spectral are dedicated mapping (-M) at moderate resolution range from 0.25 5.1 μm. The third channel devoted high spectroscopy (-H) between 2 5 VIRTIS-H field view approximately centered middle -M image. sampling VIRTIS-M 1.8 nm/band below 1 μm 9.7 1-5 μm, while for λ/Δλ= 1300-3000 2-5...
 IntroductionMajor rock-forming minerals such as pyroxenes are very common in the solar system and show characteristic absorption bands due to Fe2+ VIS NIR [e.g., 1, 2]. The Fe-free endmember enstatite is also probably a mineral on planetary surfaces E-type asteroids Mercury [3] major constituent of meteorites aubrites [4] chondrites [5]. Reflectance spectra these well enstatite-rich or generally Fe-poor like often featureless NIR, lacking features associated with iron incorporated...
2867 Šteins is a main belt asteroid and was fly-by target of ESA’s Rosetta mission [1]. It has been previously studied by ground-based observations (e.g., [2,3,4,5,6,7]). classified as an E[II]-type asteroid. E-type asteroids are characterized flat or slightly reddish featureless reflectance spectra in the VIS NIR high geometric albedos generally associated with aubrites, enstatite achondrites [8]. additionally show absorption band at 0.49 µm, which...