Results 41 to 50 of about 740 (225)
Effect of coal type on aerosol optical properties at Ulaanbaatar city
Proceedings of the Mongolian Academy of SciencesIn this study, seasonal characteristics of aerosol optical properties at Ulaanbaatar station of the international network of SKYNET are investigated using ground-based skyradiometer from the years extending from 2017 to 2023.
Narangarav Tumur-Uyal +4 more
doaj +1 more source
Potassium isotopic compositions and exposure ages of evolved and silica‐rich achondrites
Meteoritics &Planetary Science, EarlyView.Abstract Some of the oldest igneous rocks in the Solar System include evolved and silica‐rich achondrites that originate from parent bodies less than 1000 km in diameter, referred to as planetesimals. While Earth was initially in a molten state and required continental crust formation and plate tectonics to generate andesite bulk compositions, evolved ...
Z. Vaci +9 more
wiley +1 more source
The 40K‐K dating system: 1. Improving data interpretation using new model calculations
Meteoritics &Planetary Science, EarlyView.Abstract The 40K‐K cosmic‐ray exposure (CRE) dating system offers a promising method for determining exposure ages of iron meteorites by combining the radioactive cosmogenic 40K with the stable cosmogenic isotopes 39K and 41K. However, earlier applications relied on semi‐empirical production models and inconsistent analytical data sets, limiting their ...
Farshid Nozarian +2 more
wiley +1 more source
Effects of Forbush Decreases on the Global Electric Circuit
Space WeatherThe suppression of high‐energy cosmic rays, known as Forbush decreases (FDs), represents a promising factor in influencing the global electric circuit (GEC) system.
J. Tacza, G. Li, J.‐P. Raulin
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Interior Controls on the Habitability of Rocky Planets
Space: Science & TechnologyNo matter how fascinating and exotic other terrestrial planets are revealed to be, nothing generates more excitement than announcements regarding their habitability.
Cedric Gillmann +4 more
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Impact provenance and age of a unique basalt found in Apollo 12 regolith
Meteoritics &Planetary Science, EarlyView.Abstract Basaltic sample 12032,366‐18 from the Apollo 12 landing site is distinct among basalts collected at this site, other Apollo landing sites, and lunar meteorites in terms of its age, bulk rock composition, and isotopic composition. We present new Pb isotopic data obtained by in situ Secondary Ion Mass Spectrometry on multiple mineral phases in ...
C. Deligny +5 more
wiley +1 more source
Enhanced Acceleration and Escape of Hydrogen Pickup Ions Upstream from Mars by Interplanetary Shocks
The Astrophysical JournalThe pickup process of newly ionized hydrogen (H) from the Martian extended exosphere represents an important H ^+ escape channel on Mars. It is generally believed that interplanetary (IP) shocks can accelerate the pickup ions and, in turn, affect the ...
Linxia He +6 more
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Meteoritics &Planetary Science, EarlyView.Abstract Here we report on the microstructure and chemistry of sulfide minerals returned from asteroid (162173) Ryugu. We identify a unique sulfide population in particle A0016 composed of violarite (FeNi2S4), pyrite (FeS2), chalcopyrite (CuFeS2), pyrrhotite (Fe1‐xS), and pentlandite ([Fe,Ni]9S8).
M. C. Benner +3 more
wiley +1 more source
“X-Raying” a Be Star Disk: Fundamental Parameters of the Eclipsing Binary Be Star V658 Car
The Astrophysical JournalWith its two stellar eclipses and two disk attenuations per binary orbit, V658 Carinae stands out as the first clear eclipsing Be + sdOB system. This rare alignment offers a unique opportunity to probe the structure and dynamics of a Be star disk with ...
Tajan H. de Amorim +10 more
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Stellar chemistry and planet size: Insights from GALAH DR4
Astronomy & AstrophysicsThe well-known correlation between stellar metallicity and the presence of planets is strongest for giant planets and weaker for smaller planets, suggesting that detailed elemental patterns beyond [Fe/H] may be relevant.
Sussholz N. +3 more
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