3D-modeling of Callisto’s sputtered surface-exosphere environment

Lammer, Helmut; Pfleger, Martin; Lindqvist, Jesper; Lichtenegger, Herbert; Holmström, Mats; Vorburger, Audrey Helena; Wurz, Peter; Barabash, Stas (April 2016). 3D-modeling of Callisto’s sputtered surface-exosphere environment. In: EGU General Assembly. Geophysical Research Abstracts: Vol. 18. EGU

[img]
Preview
Text
EGU2016-2938-1.pdf - Published Version
Available under License Creative Commons: Attribution (CC-BY).

Download (36kB) | Preview

We study the stoichiometrical release of various surface elements caused by plasma sputtering from an assumed icy and non-icy (i.e. chondritic) surface into the exosphere of the Jovian satellite Callisto. We apply a 3D plasma planetary interaction hybrid model that is used for the evaluation of precipitation maps of magnetospheric H+, O+ and S+ sputter agents onto Callisto’s surface. The obtained precipitation maps are then applied to the assumed surface compositions where the related sputter yields are calculated by means of the 2013 SRIM code and are coupled with a 3D exosphere model. Sputtered surface particles are followed on their individual trajectories until they either escape Callisto’s gravitational attraction or return to the surface. We study also the effect of collisions between sputter species and ambient O2 molecules which form a tiny atmosphere near the satellite’s surface and compare the exosphere densities that are obtained from the 3D model with and without a background gaseous envelope with recent 1D model results. Finally we discuss if the Neutral gas and Ion Mass (NIM) spectrometer, that is part of the Particle Environment Package (PEP) on board of the JUICE mission will be able to detect sputtered particles from Callisto’s icy and non-icy surface

Item Type:

Conference or Workshop Item (Abstract)

Division/Institute:

08 Faculty of Science > Physics Institute > Space Research and Planetary Sciences

UniBE Contributor:

Vorburger, Audrey Helena and Wurz, Peter

Subjects:

500 Science > 520 Astronomy

ISSN:

1029-7006

Series:

Geophysical Research Abstracts

Publisher:

EGU

Language:

English

Submitter:

Dora Ursula Zimmerer

Date Deposited:

11 Oct 2017 15:05

Last Modified:

11 Oct 2017 17:41

BORIS DOI:

10.7892/boris.105626

URI:

https://boris.unibe.ch/id/eprint/105626

Actions (login required)

Edit item Edit item
Provide Feedback