On structural properties of Comet 67/P dust particles collected in situ by ROSETTA/COSIMA from observations of electrical fragmentation

IF 1.8 4区物理与天体物理 Q3 ASTRONOMY & ASTROPHYSICS

Planetary and Space Science Pub Date : 2023-10-15 DOI:10.1016/j.pss.2023.105747

Klaus Hornung , Eva Maria Mellado , Oliver J. Stenzel , Yves Langevin , Sihane Merouane , Nicolas Fray , Henning Fischer , John Paquette , Donia Baklouti , Anais Bardyn , Cecile Engrand , Hervé Cottin , Laurent Thirkell , Christelle Briois , Jouni Rynö , Johan Silen , Rita Schulz , Sandra Siljeström , Harry Lehto , Kurt Varmuza , Martin Hilchenbach

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引用次数: 1

Abstract

During ESA's Rosetta science mission, the COSIMA instrument collected dust particles in the coma of Comet 67P/Churyumov-Gerasimenko during two years near the comet's nucleus. The largest particles are about $1 m m$ in size. The collection process involved a low velocity impact on porous gold-black surfaces, often resulting in breakup, from which information on structural properties has previously been derived (Langevin et al., 2016). However, some of the particles were collected with little damage, but fragmented due to charging during subsequent secondary ion mass spectrometry. This report shows that the details of this electrical fragmentation support the concept of the existence of stable units with sizes of tens of $μ m$ within the incoming cometary dust particles prior to collection, possibly representing remnants of the early accretion processes.

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ROSETTA/COSIMA从电碎裂观测中原位收集的67/P彗星尘埃颗粒的结构特性

在ESA的罗塞塔科学任务期间，COSIMA仪器在67P/Churyumov-Gerasimenko彗星的彗核附近收集了两年的尘埃颗粒。最大的颗粒大小约为1毫米。收集过程涉及到对多孔金黑色表面的低速撞击，通常会导致破裂，从这一过程中可以获得有关结构特性的信息(Langevin et al.， 2016)。然而，在随后的二次离子质谱分析中，一些颗粒几乎没有损坏，但由于充电而破碎。该报告表明，这种电碎裂的细节支持了在收集之前进入的彗星尘埃颗粒中存在尺寸为数十μm的稳定单元的概念，可能代表早期吸积过程的残留物。

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来源期刊

Planetary and Space Science 地学天文-天文与天体物理

CiteScore

5.40

自引率

4.20%

发文量

126

审稿时长

15 weeks

期刊介绍： Planetary and Space Science publishes original articles as well as short communications (letters). Ground-based and space-borne instrumentation and laboratory simulation of solar system processes are included. The following fields of planetary and solar system research are covered: • Celestial mechanics, including dynamical evolution of the solar system, gravitational captures and resonances, relativistic effects, tracking and dynamics • Cosmochemistry and origin, including all aspects of the formation and initial physical and chemical evolution of the solar system • Terrestrial planets and satellites, including the physics of the interiors, geology and morphology of the surfaces, tectonics, mineralogy and dating • Outer planets and satellites, including formation and evolution, remote sensing at all wavelengths and in situ measurements • Planetary atmospheres, including formation and evolution, circulation and meteorology, boundary layers, remote sensing and laboratory simulation • Planetary magnetospheres and ionospheres, including origin of magnetic fields, magnetospheric plasma and radiation belts, and their interaction with the sun, the solar wind and satellites • Small bodies, dust and rings, including asteroids, comets and zodiacal light and their interaction with the solar radiation and the solar wind • Exobiology, including origin of life, detection of planetary ecosystems and pre-biological phenomena in the solar system and laboratory simulations • Extrasolar systems, including the detection and/or the detectability of exoplanets and planetary systems, their formation and evolution, the physical and chemical properties of the exoplanets • History of planetary and space research