Influence of the Dielectric Permittivity of the Surface Layer on Charging of Airless Cosmic Bodies

IF 0.6 4区物理与天体物理 Q4 ASTRONOMY & ASTROPHYSICS

Solar System Research Pub Date : 2025-05-20 DOI:10.1134/S0038094624601944

N. D. Borisov

引用次数: 0

Abstract

Electric charging of the surfaces of airless cosmic bodies is caused by the action of the solar wind plasma and the solar UV radiation. In the present paper it is investigated how the dielectric permittivity of the surface layer of small cosmic bodies (asteroids, dwarf planets) influences their surface charging (and hence charging of dust grains on the surface). We show theoretically that this dielectric permittivity in some regions provides significantly stronger charging of the surface than it was estimated earlier. In relation with this it is investigated how the layer with the frozen water under the surface influences charging of dust grains.

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表层介电常数对无空气宇宙体带电的影响

无空气的宇宙天体表面的电荷是由太阳风等离子体和太阳紫外线辐射的作用引起的。本文研究了小天体（小行星、矮行星）表面层的介电常数如何影响它们的表面电荷（从而影响表面尘埃颗粒的电荷）。我们从理论上证明，某些区域的介电常数提供了比先前估计的更强的表面电荷。与此相关的是，研究了表面下有冻结水的层如何影响粉尘颗粒的电荷。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Solar System Research 地学天文-天文与天体物理

CiteScore

1.60

自引率

33.30%

发文量

审稿时长

6-12 weeks

期刊介绍： Solar System Research publishes articles concerning the bodies of the Solar System, i.e., planets and their satellites, asteroids, comets, meteoric substances, and cosmic dust. The articles consider physics, dynamics and composition of these bodies, and techniques of their exploration. The journal addresses the problems of comparative planetology, physics of the planetary atmospheres and interiors, cosmochemistry, as well as planetary plasma environment and heliosphere, specifically those related to solar-planetary interactions. Attention is paid to studies of exoplanets and complex problems of the origin and evolution of planetary systems including the solar system, based on the results of astronomical observations, laboratory studies of meteorites, relevant theoretical approaches and mathematical modeling. Alongside with the original results of experimental and theoretical studies, the journal publishes scientific reviews in the field of planetary exploration, and notes on observational results.