The best temperature range to acquire reliable thermal infrared spectra from orbit

Abstract Solar System bodies undergo to daily and periodical variations of temperature that mainly depend on their closeness to the Sun. It is known that mineral expansion and contraction due to such variations modify the thermal infrared spectra acquired on solid surfaces. Therefore, it becomes cru...

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Autores principales:	F. Nestola, S. Ferrari, M. G. Pamato, G. Redhammer, J. Helbert, M. Alvaro, M. C. Domeneghetti
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/5c638da360284598ab914bba3d2e32aa
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spelling	oai:doaj.org-article:5c638da360284598ab914bba3d2e32aa2021-12-02T16:05:55ZThe best temperature range to acquire reliable thermal infrared spectra from orbit10.1038/s41598-021-92130-12045-2322https://doaj.org/article/5c638da360284598ab914bba3d2e32aa2021-06-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-92130-1https://doaj.org/toc/2045-2322Abstract Solar System bodies undergo to daily and periodical variations of temperature that mainly depend on their closeness to the Sun. It is known that mineral expansion and contraction due to such variations modify the thermal infrared spectra acquired on solid surfaces. Therefore, it becomes crucial to know the best temperature range at which the acquisition itself should be carried out to get reliable information on the mineralogy of such bodies. Here we provide the thermal expansion of olivine between 20 and 298 K determined by X-ray diffraction. Our data reveal the non-linear behaviour of silicates that undergo to low temperatures, where volume variations appear positively correlated with temperatures. Subtle bond-length variations occurring at low temperatures are then expected to minimally affect vibrational absorption positions. We suggest that thermal infrared spectra of those Solar-System surfaces that are not exceeding 300 K provide reliable information about not only the silicate mineral identification but also on their chemical composition, regardless of the instantaneous temperature.F. NestolaS. FerrariM. G. PamatoG. RedhammerJ. HelbertM. AlvaroM. C. DomeneghettiNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-6 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q F. Nestola S. Ferrari M. G. Pamato G. Redhammer J. Helbert M. Alvaro M. C. Domeneghetti The best temperature range to acquire reliable thermal infrared spectra from orbit
description	Abstract Solar System bodies undergo to daily and periodical variations of temperature that mainly depend on their closeness to the Sun. It is known that mineral expansion and contraction due to such variations modify the thermal infrared spectra acquired on solid surfaces. Therefore, it becomes crucial to know the best temperature range at which the acquisition itself should be carried out to get reliable information on the mineralogy of such bodies. Here we provide the thermal expansion of olivine between 20 and 298 K determined by X-ray diffraction. Our data reveal the non-linear behaviour of silicates that undergo to low temperatures, where volume variations appear positively correlated with temperatures. Subtle bond-length variations occurring at low temperatures are then expected to minimally affect vibrational absorption positions. We suggest that thermal infrared spectra of those Solar-System surfaces that are not exceeding 300 K provide reliable information about not only the silicate mineral identification but also on their chemical composition, regardless of the instantaneous temperature.
format	article
author	F. Nestola S. Ferrari M. G. Pamato G. Redhammer J. Helbert M. Alvaro M. C. Domeneghetti
author_facet	F. Nestola S. Ferrari M. G. Pamato G. Redhammer J. Helbert M. Alvaro M. C. Domeneghetti
author_sort	F. Nestola
title	The best temperature range to acquire reliable thermal infrared spectra from orbit
title_short	The best temperature range to acquire reliable thermal infrared spectra from orbit
title_full	The best temperature range to acquire reliable thermal infrared spectra from orbit
title_fullStr	The best temperature range to acquire reliable thermal infrared spectra from orbit
title_full_unstemmed	The best temperature range to acquire reliable thermal infrared spectra from orbit
title_sort	best temperature range to acquire reliable thermal infrared spectra from orbit
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/5c638da360284598ab914bba3d2e32aa
work_keys_str_mv	AT fnestola thebesttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT sferrari thebesttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT mgpamato thebesttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT gredhammer thebesttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT jhelbert thebesttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT malvaro thebesttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT mcdomeneghetti thebesttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT fnestola besttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT sferrari besttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT mgpamato besttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT gredhammer besttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT jhelbert besttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT malvaro besttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit AT mcdomeneghetti besttemperaturerangetoacquirereliablethermalinfraredspectrafromorbit
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The best temperature range to acquire reliable thermal infrared spectra from orbit

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