Dust arcs in the region of Jupiter’s Trojan asteroids
|Author:||Liu, Xiaodong1; Schmidt, Jürgen1|
1Astronomy Research Unit, University of Oulu, 90014 Oulu, Finland
|Online Access:||PDF Full Text (PDF, 0.4 MB)|
|Persistent link:|| http://urn.fi/urn:nbn:fi-fe2018080833516
|Publish Date:|| 2018-08-08
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.
Astronomy and astrophysics
|Type of Publication:||
A1 Journal article – refereed
|Field of Science:||
115 Astronomy and space science
This work is supported by the European Space Agency under the project Jovian Micrometeoroid Environment Model (JMEM) (contract number: 4000107249/12/NL/AF).
© ESO, 2018. Published in this repository with the kind permission of the publisher.