University of Oulu

Liu, X., Schmidt, J. (2018) Dust arcs in the region of Jupiter’s Trojan asteroids. Astronomy and Astrophysics, 609, A57. doi:10.1051/0004-6361/201730951

Dust arcs in the region of Jupiter’s Trojan asteroids

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Author: Liu, Xiaodong1; Schmidt, Jürgen1
Organizations: 1Astronomy Research Unit, University of Oulu, 90014 Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.4 MB)
Persistent link: http://urn.fi/urn:nbn:fi-fe2018080833516
Language: English
Published: EDP Sciences, 2018
Publish Date: 2018-08-08
Description:

Abstract

Aims: The surfaces of the Trojan asteroids are steadily bombarded by interplanetary micrometeoroids, which releases ejecta of small dust particles. These particles form the faint dust arcs that are associated with asteroid clouds. Here we analyze the particle dynamics and structure of the arc in the region of the L₄ Trojan asteroids.

Methods: We calculate the total cross section of the L₄ Trojan asteroids and the production rate of dust particles. The motion of the particles is perturbed by a variety of forces. We simulate the dynamical evolution of the dust particles, and explore the overall features of the Trojan dust arc.

Results: The simulations show that the arc is mainly composed of grains in the size range 4‒10 microns. Compared to the L₄ Trojan asteroids, the dust arc is distributed more widely in the azimuthal direction, extending to a range of [30, 120] degrees relative to Jupiter. The peak number density does not develop at L₄. There exist two peaks that are azimuthally displaced from L₄.

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Series: Astronomy and astrophysics
ISSN: 0004-6361
ISSN-E: 1432-0746
ISSN-L: 0004-6361
Volume: 609
Article number: A57
DOI: 10.1051/0004-6361/201730951
OADOI: https://oadoi.org/10.1051/0004-6361/201730951
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Subjects:
Funding: This work is supported by the European Space Agency under the project Jovian Micrometeoroid Environment Model (JMEM) (contract number: 4000107249/12/NL/AF).
Copyright information: © ESO, 2018. Published in this repository with the kind permission of the publisher.