Počet záznamů: 1
Simulation of Space Weathering on Asteroid Spectra through Hydrogen Ion Irradiation of Meteorites
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SYSNO ASEP 0571244 Druh ASEP J - Článek v odborném periodiku Zařazení RIV J - Článek v odborném periodiku Poddruh J Článek ve WOS Název Simulation of Space Weathering on Asteroid Spectra through Hydrogen Ion Irradiation of Meteorites Tvůrce(i) Palamakumbure, L. (FI)
Mizohata, K. (FI)
Flanderová, Kateřina (GLU-S) ORCID, SAI
Korda, D. (FI)
Penttilä, A. (FI)
Kohout, Tomáš (GLU-S) RID, SAI, ORCIDČíslo článku 72 Zdroj.dok. The Planetary Science Journal. - : American Astronomical Society
Roč. 4, č. 4 (2023)Poč.str. 10 s. Jazyk dok. eng - angličtina Země vyd. US - Spojené státy americké Klíč. slova Space weathering ; meteorite ; chondrite ; reflectance spectra ; solar wind ; Bjurböle ; Avahandava ; Luotolax Obor OECD Astronomy (including astrophysics,space science) Způsob publikování Open access Institucionální podpora GLU-S - RVO:67985831 UT WOS 000976724200001 EID SCOPUS 85179793323 DOI 10.3847/PSJ/acc848 Anotace Space weathering can be defined as the combination of physical and chemical changes that occur in material exposed to an interplanetary environment on the surface of airless bodies. This process results in alterations in material spectroscopic features. Eventually, it can lead to misinterpretation of remotely sensed data in the visible–near-infrared wavelength range. This study simulates the solar wind effect on asteroid spectra through low-energy 1 keV H+ irradiation of meteorite pressed-powder samples under three fluences, 2 × 1017, 5 × 1017, and 1 × 1018 H+ cm−2, and evaluates changes associated with reflectance spectra. The meteorites subjected to the study are Bjurböle (L/LL4), Avanhandava (H4), and Luotolax (howardite). The most prominent changes in all three meteorites are (1) a decrease of 550 nm reflectance, (2) reddening in the 1 μm region, and (3) a monotonous decrease in absorption band strengths in Bjurböle. No significant changes were observed in the 2 μm region. The results imply that at short timescales (102–103 yr), radiation damage as amorphization and vesicle formation caused by low-energy solar wind is the dominant space weathering factor in all three meteorite compositions, causing spectral changes predominantly in the 1 μm region. Pracoviště Geologický ústav Kontakt Jana Popelková, popelkova@gli.cas.cz, Sabina Janíčková, Tel.: 233 087 272 Rok sběru 2024 Elektronická adresa https://iopscience.iop.org/article/10.3847/PSJ/acc848
Počet záznamů: 1