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Prediction of Olivine Composition Under Limited Calibration Inputs: Comparative Study of Mid-Infrared Reflection, Raman Scattering, and Laser-Induced Plasma Spectroscopies.
Appl Spectrosc
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Zentrum für Rieskrater und Impaktforschung, Nördlingen, Germany.
In situ optical analytical spectroscopies offer great geochemical insights due to their capability to resolve the chemical composition of regolith surfaces of rocky celestial bodies. The use of suitable calibration targets improves the precision of mineral determination, which is of critical importance for short-living, low-mobility landers, and enables, in special cases, determination of elemental composition. We investigate the capabilities of three space-relevant optical analytical techniques used for in situ mineralogical analysis, i.
View Article and Find Full Text PDFLunar Lithium-7 Sensing (7Li): Spectral Patterns and Artificial Intelligence Techniques.
Sensors (Basel)
June 2024
Instituto de Ciencias y Tecnologías Espaciales de Asturias, Universidad de Oviedo, 33004 Oviedo, Spain.
Lithium, a critical natural resource integral to modern technology, has influenced diverse industries since its discovery in the 1950s. Of particular interest is lithium-7, the most prevalent lithium isotope on Earth, playing a vital role in applications such as batteries, metal alloys, medicine, and nuclear research. However, its extraction presents significant environmental and logistical challenges.
View Article and Find Full Text PDFOrigin of an orbiting star around the galactic supermassive black hole.
Proc Jpn Acad Ser B Phys Biol Sci
January 2024
Instituto de Astrofísica de Andalucía (IAA)-CSIC.
The tremendous tidal force that is linked to the supermassive black hole (SMBH) at the center of our galaxy is expected to strongly subdue star formation in its vicinity. Stars within 1'' from the SMBH thus likely formed further from the SMBH and migrated to their current positions. In this study, spectroscopic observations of the star S0-6/S10, one of the closest (projected distance from the SMBH of ≈0''.
View Article and Find Full Text PDFExtending aquatic spectral information with the first radiometric IR-B field observations.
PNAS Nexus
November 2023
Goddard Space Flight Center, National Aeronautics and Space Administration, Greenbelt, 20771 MD, USA.
Planetary radiometric observations enable remote sensing of biogeochemical parameters to describe spatiotemporal variability in aquatic ecosystems. For approximately the last half century, the science of aquatic radiometry has established a knowledge base using primarily, but not exclusively, visible wavelengths. Scientific subdisciplines supporting aquatic radiometry have evolved hardware, software, and procedures to maximize competency for exploiting visible wavelength information.
View Article and Find Full Text PDFCircumstellar material ejected violently by a massive star immediately before its death.
Sci Bull (Beijing)
November 2023
Yunnan Observatories (YNAO), Chinese Academy of Sciences, Kunming 650216, China; Key Laboratory for the Structure and Evolution of Celestial Objects, Chinese Academy of Sciences, Kunming 650216, China; International Centre of Supernovae, Yunnan Key Laboratory, Kunming 650216, China.
Type II supernovae represent the most common stellar explosions in the Universe, for which the final stage evolution of their hydrogen-rich massive progenitors towards core-collapse explosion are elusive. The recent explosion of SN 2023ixf in a very nearby galaxy, Messier 101, provides a rare opportunity to explore this longstanding issue. With the timely high-cadence flash spectra taken within 1-5 days after the explosion, we can put stringent constraints on the properties of the surrounding circumstellar material around this supernova.
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