Organic matter and water from asteroid Itokawa

Abstract Understanding the true nature of extra-terrestrial water and organic matter that were present at the birth of our solar system, and their subsequent evolution, necessitates the study of pristine astromaterials. In this study, we have studied both the water and organic contents from a dust p...

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Autores principales:	Q. H. S. Chan, A. Stephant, I. A. Franchi, X. Zhao, R. Brunetto, Y. Kebukawa, T. Noguchi, D. Johnson, M. C. Price, K. H. Harriss, M. E. Zolensky, M. M. Grady
Formato:	article
Lenguaje:	EN
Publicado:	Nature Portfolio 2021
Materias:	Medicine R Science Q
Acceso en línea:	https://doaj.org/article/a0736d739c944492a1cace4b1676c821
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spelling	oai:doaj.org-article:a0736d739c944492a1cace4b1676c8212021-12-02T13:19:31ZOrganic matter and water from asteroid Itokawa10.1038/s41598-021-84517-x2045-2322https://doaj.org/article/a0736d739c944492a1cace4b1676c8212021-03-01T00:00:00Zhttps://doi.org/10.1038/s41598-021-84517-xhttps://doaj.org/toc/2045-2322Abstract Understanding the true nature of extra-terrestrial water and organic matter that were present at the birth of our solar system, and their subsequent evolution, necessitates the study of pristine astromaterials. In this study, we have studied both the water and organic contents from a dust particle recovered from the surface of near-Earth asteroid 25143 Itokawa by the Hayabusa mission, which was the first mission that brought pristine asteroidal materials to Earth’s astromaterial collection. The organic matter is presented as both nanocrystalline graphite and disordered polyaromatic carbon with high D/H and 15N/14N ratios (δD = + 4868 ± 2288‰; δ15N = + 344 ± 20‰) signifying an explicit extra-terrestrial origin. The contrasting organic feature (graphitic and disordered) substantiates the rubble-pile asteroid model of Itokawa, and offers support for material mixing in the asteroid belt that occurred in scales from small dust infall to catastrophic impacts of large asteroidal parent bodies. Our analysis of Itokawa water indicates that the asteroid has incorporated D-poor water ice at the abundance on par with inner solar system bodies. The asteroid was metamorphosed and dehydrated on the formerly large asteroid, and was subsequently evolved via late-stage hydration, modified by D-enriched exogenous organics and water derived from a carbonaceous parent body.Q. H. S. ChanA. StephantI. A. FranchiX. ZhaoR. BrunettoY. KebukawaT. NoguchiD. JohnsonM. C. PriceK. H. HarrissM. E. ZolenskyM. M. GradyNature PortfolioarticleMedicineRScienceQENScientific Reports, Vol 11, Iss 1, Pp 1-12 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Medicine R Science Q
spellingShingle	Medicine R Science Q Q. H. S. Chan A. Stephant I. A. Franchi X. Zhao R. Brunetto Y. Kebukawa T. Noguchi D. Johnson M. C. Price K. H. Harriss M. E. Zolensky M. M. Grady Organic matter and water from asteroid Itokawa
description	Abstract Understanding the true nature of extra-terrestrial water and organic matter that were present at the birth of our solar system, and their subsequent evolution, necessitates the study of pristine astromaterials. In this study, we have studied both the water and organic contents from a dust particle recovered from the surface of near-Earth asteroid 25143 Itokawa by the Hayabusa mission, which was the first mission that brought pristine asteroidal materials to Earth’s astromaterial collection. The organic matter is presented as both nanocrystalline graphite and disordered polyaromatic carbon with high D/H and 15N/14N ratios (δD = + 4868 ± 2288‰; δ15N = + 344 ± 20‰) signifying an explicit extra-terrestrial origin. The contrasting organic feature (graphitic and disordered) substantiates the rubble-pile asteroid model of Itokawa, and offers support for material mixing in the asteroid belt that occurred in scales from small dust infall to catastrophic impacts of large asteroidal parent bodies. Our analysis of Itokawa water indicates that the asteroid has incorporated D-poor water ice at the abundance on par with inner solar system bodies. The asteroid was metamorphosed and dehydrated on the formerly large asteroid, and was subsequently evolved via late-stage hydration, modified by D-enriched exogenous organics and water derived from a carbonaceous parent body.
format	article
author	Q. H. S. Chan A. Stephant I. A. Franchi X. Zhao R. Brunetto Y. Kebukawa T. Noguchi D. Johnson M. C. Price K. H. Harriss M. E. Zolensky M. M. Grady
author_facet	Q. H. S. Chan A. Stephant I. A. Franchi X. Zhao R. Brunetto Y. Kebukawa T. Noguchi D. Johnson M. C. Price K. H. Harriss M. E. Zolensky M. M. Grady
author_sort	Q. H. S. Chan
title	Organic matter and water from asteroid Itokawa
title_short	Organic matter and water from asteroid Itokawa
title_full	Organic matter and water from asteroid Itokawa
title_fullStr	Organic matter and water from asteroid Itokawa
title_full_unstemmed	Organic matter and water from asteroid Itokawa
title_sort	organic matter and water from asteroid itokawa
publisher	Nature Portfolio
publishDate	2021
url	https://doaj.org/article/a0736d739c944492a1cace4b1676c821
work_keys_str_mv	AT qhschan organicmatterandwaterfromasteroiditokawa AT astephant organicmatterandwaterfromasteroiditokawa AT iafranchi organicmatterandwaterfromasteroiditokawa AT xzhao organicmatterandwaterfromasteroiditokawa AT rbrunetto organicmatterandwaterfromasteroiditokawa AT ykebukawa organicmatterandwaterfromasteroiditokawa AT tnoguchi organicmatterandwaterfromasteroiditokawa AT djohnson organicmatterandwaterfromasteroiditokawa AT mcprice organicmatterandwaterfromasteroiditokawa AT khharriss organicmatterandwaterfromasteroiditokawa AT mezolensky organicmatterandwaterfromasteroiditokawa AT mmgrady organicmatterandwaterfromasteroiditokawa
_version_	1718393288890777600

Organic matter and water from asteroid Itokawa

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