Distinguishing between Shock-darkening and Space-weathering Trends in Ordinary Chondrite Reflectance Spectra

Result code in IS VaVaI
<a href="https://www.isvavai.cz/riv?ss=detail&h=RIV%2F67985831%3A_____%2F20%3A00541356" target="_blank" >RIV/67985831:_____/20:00541356 - isvavai.cz</a>
Alternative codes found
RIV/26722445:_____/20:N0000089
Result on the web
<a href="https://iopscience.iop.org/article/10.3847/PSJ/aba7c2/pdf" target="_blank" >https://iopscience.iop.org/article/10.3847/PSJ/aba7c2/pdf</a>
DOI - Digital Object Identifier
<a href="http://dx.doi.org/10.3847/PSJ/aba7c2" target="_blank" >10.3847/PSJ/aba7c2</a>

Result language
angličtina
Original language name
Distinguishing between Shock-darkening and Space-weathering Trends in Ordinary Chondrite Reflectance Spectra
Original language description
Space-weathering as well as shock effects can darken meteorite and asteroid reflectance spectra. We present a detailed comparative study on shock-darkening and space-weathering using different lithologies of the Chelyabinsk LL5 chondrite. Compared to space-weathering, the shock processes do not cause significant spectral slope changes and are more efficient in attenuating the orthopyroxene 2μm absorption band. This results in a distinct shock vector in the reflectance spectra principal component analysis, moving the shocked silicate-rich Chelyabinsk spectra from the S-complex space into the C/X complex. In contrast to this, the space-weathering vector stays within the S complex, moving from Q type to S type. Moreover, the 2 μm to 1 μm band depth ratio (BDR) as well as the 2 μm to 1 μm band area ratio (BAR) are not appreciably affected by shock-darkening or shock melting. Space-weathering, however, causes significant shifts in both BDR and BAR toward higher values. Application of the BDR method to the three distinct areas on the asteroid Itokawa reveals that Itokawa is rather uniformly space-weathered and not influenced by regolith roughness or relative albedo changes.
Czech name
—
Czech description
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Project
<a href="/en/project/LH12079" target="_blank" >LH12079: Laboratory simulations of space weathering - the role of iron nanoparticles in the reflectance spectra of asteroids</a><br>
Continuities
P - Projekt vyzkumu a vyvoje financovany z verejnych zdroju (s odkazem do CEP)

Publication year
2020
Confidentiality
S - Úplné a pravdivé údaje o projektu nepodléhají ochraně podle zvláštních právních předpisů

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