Transport of dust across the Solar System: Constraints on the spatial origin of individual micrometeorites from cosmic-ray exposure.

Feige, J; Airo, A; Berger, D; Brückner, D; Gärtner, A; Genge, M; Leya, I; Habibi Marekani, F; Hecht, L; Klingner, N; Lachner, J; Li, X; Merchel, S; Nissen, J; Patzer, A B C; Peterson, S; Schropp, A; Sager, C; Suttle, M D; Trappitsch, R; ... (2024). Transport of dust across the Solar System: Constraints on the spatial origin of individual micrometeorites from cosmic-ray exposure. Philosophical transactions of the Royal Society. Series A - mathematical, physical and engineering sciences, 382(2273) Royal Society of London 10.1098/rsta.2023.0197

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The origin of micrometeorites (MMs) from asteroids and comets is well-established, but the relative contribution from these two classes remains poorly resolved. Likewise, determining the precise origin of individual MMs is an open challenge. Here, cosmic-ray exposure ages are used to resolve the spatial origins of 12 MMs collected from urban areas and Antarctica. Their 26Al and 10Be concentration, produced during cosmic-ray irradiation in space, were measured by accelerator mass spectrometry. These data are compared to results from a model simulating the transport and irradiation of the MM precursors in space. This model, for the first time, considers a variety of orbits, precursor particle sizes, compositions and densities and incorporates non-isotropic solar and galactic cosmic-ray flux profiles, depth-dependent production rates, as well as spherical evaporation during atmospheric entry. While the origin for six MMs remains ambiguous, two MMs show a preferential tendency towards an origin in the Inner Solar System (Near Earth Objects to the Asteroid Belt) and four towards an origin in the Outer Solar System (Jupiter Family Comets to the Kuiper Belt). These findings challenge the notion that dust originating from the Outer Solar System is unlikely to survive long-term transport and delivery to the terrestrial planets. This article is part of the theme issue 'Dust in the Solar System and beyond'.

Item Type:

Journal Article (Original Article)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences
08 Faculty of Science > Physics Institute

UniBE Contributor:

Leya, Ingo

Subjects:

500 Science > 520 Astronomy
600 Technology > 620 Engineering
500 Science > 530 Physics

ISSN:

1364-503X

Publisher:

Royal Society of London

Language:

English

Submitter:

Pubmed Import

Date Deposited:

13 May 2024 15:15

Last Modified:

14 May 2024 14:11

Publisher DOI:

10.1098/rsta.2023.0197

PubMed ID:

38736334

Uncontrolled Keywords:

10Be 26Al AMS exposure age micrometeorites

BORIS DOI:

10.48350/196734

URI:

https://boris.unibe.ch/id/eprint/196734

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