University of Oulu

Ershova, A., & Schmidt, J. (2021). Two-body model for the spatial distribution of dust ejected from an atmosphereless body. Astronomy & Astrophysics, 650, A186.

Two-body model for the spatial distribution of dust ejected from an atmosphereless body

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Author: Ershova, Anastasiia1; Schmidt, Jürgen1
Organizations: 1Space Physics and Astronomy Research Unit, University of Oulu, Pentti Kaiteran katu 1, Oulu, Finland
Format: article
Version: published version
Access: open
Online Access: PDF Full Text (PDF, 0.6 MB)
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Language: English
Published: EDP Sciences, 2021
Publish Date: 2021-09-02


Aims: We present a model for the configuration of noninteracting material that is ejected in a continuous manner from an atmosphereless gravitating body for a given distribution of sources. The model is applicable to material on bound or unbound trajectories and to steady and nonsteady modes of ejection.

Methods: For a jet that is inclined to the surface normal, we related the distributions of ejection direction, velocity, and size to the phase-space number density at the distance from the source body. Integrating over velocity space, we obtained an expression from which we inferred the density, flux, or optical depth of the ejected material.

Results: As examples for the application of the code, we calculate profiles of the dust density in the Enceladus plume, the pattern of mass deposition rates around a plume on Europa, and images of optical depth following the nonstationary emission of material from a volcano on Io. We make the source code of a Fortran-95 implementation of the model freely available.

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Series: Astronomy and astrophysics
ISSN: 0004-6361
ISSN-E: 1432-0746
ISSN-L: 0004-6361
Volume: 650
Article number: A186
DOI: 10.1051/0004-6361/202140624
Type of Publication: A1 Journal article – refereed
Field of Science: 115 Astronomy and space science
Funding: This work was supported by the Academy of Finland.
Copyright information: © ESO 2021.