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

• Main Authors: Feige, Jenny, Airo, Alessandro, Berger, Dirk, Brückner, Dennis, Gärtner, Andreas, Genge, Matthew, Leya, Ingo, Habibi Marekani, Fatemeh, Hecht, Lutz, Klingner, Nico, Lachner, Johannes, Li, Xiaosong, Merchel, Silke, Nissen, Jörg, Patzer, Beate, Peterson, Scott, Schropp, Andreas, Sager, Christof, Suttle, Martin, Trappitsch, Reto, Weinhold, Joachim
• Format: Article in Journal/Newspaper
• Language: unknown
• Published: The Royal Society 2024
• Subjects: Solar system planetary science excl. planetary geology; Antarc*; Antarctica
• Online Access: https://dx.doi.org/10.6084/m9.figshare.c.7218770.v2; https://rs.figshare.com/collections/Supplementary_material_from_Transport_of_dust_across_the_Solar_System_Constraints_on_the_spatial_origin_of_individual_micrometeorites_from_cosmic-ray_exposure_/7218770/2

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 micrometeorites is an open challenge. Here, cosmic-ray exposure ages are used to resolve the spatial origins of twelve 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 ...