Universität zu Köln

Kriegel, Hendrik, Simon, Sven ORCID: 0000-0002-6204-5437, Motschmann, Uwe, Saur, Joachim ORCID: 0000-0003-1413-1231, Neubauer, Fritz M., Persoon, Ann M., Dougherty, Michele K. and Gurnett, Donald A. (2011). Influence of negatively charged plume grains on the structure of Enceladus' Alfven wings: Hybrid simulations versus Cassini Magnetometer data. J. Geophys. Res-Space Phys., 116. WASHINGTON: AMER GEOPHYSICAL UNION. ISSN 0148-0227

Full text not available from this repository.

Abstract

We apply the hybrid simulation code AIKEF (adaptive ion kinetic electron fluid) to the interaction between Enceladus' plume and Saturn's magnetospheric plasma. For the first time, the influence of the electron-absorbing dust grains in the plume on the plasma structures and magnetic field perturbation, the Alfven wing, is taken into account within the framework of a global simulation. Our work continues the analytical calculations by Simon et al. (2011), who showed that electron absorption within the plume leads to a negative sign of the Hall conductivity. The resulting twist of the magnetic field, referred to as the Anti-Hall effect, has been observed during all targeted Enceladus flybys between 2005 and 2010. We show that (1) applying a plume model that considers both, the neutral gas and the dust allow us to quantitatively explain Cassini Magnetometer (MAG) data, (2) dust enhances the anti-Saturnward deflection of the ions, causing asymmetries which are evident in the MAG data, and (3) the ions in the plume are slowed down below 1 km s(-1); and we compare our results to MAG data in order to systematically analyze variations in the plume activity and orientation for selected pairs of similar flybys: (E5, E6), (E7, E9) and (E8, E11).

Item Type:	Journal Article
Creators:	Creators Email ORCID ORCID Put Code Kriegel, Hendrik UNSPECIFIED UNSPECIFIED UNSPECIFIED Simon, Sven UNSPECIFIED orcid.org/0000-0002-6204-5437 UNSPECIFIED Motschmann, Uwe UNSPECIFIED UNSPECIFIED UNSPECIFIED Saur, Joachim UNSPECIFIED orcid.org/0000-0003-1413-1231 UNSPECIFIED Neubauer, Fritz M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Persoon, Ann M. UNSPECIFIED UNSPECIFIED UNSPECIFIED Dougherty, Michele K. UNSPECIFIED UNSPECIFIED UNSPECIFIED Gurnett, Donald A. UNSPECIFIED UNSPECIFIED UNSPECIFIED
URN:	urn:nbn:de:hbz:38-487122
DOI:	10.1029/2011JA016842
Journal or Publication Title:	J. Geophys. Res-Space Phys.
Volume:	116
Date:	2011
Publisher:	AMER GEOPHYSICAL UNION
Place of Publication:	WASHINGTON
ISSN:	0148-0227
Language:	English
Faculty:	Unspecified
Divisions:	Unspecified
Subjects:	no entry
Uncontrolled Keywords:	Keywords Language PLASMA ENVIRONMENT; SATURNS PLASMA; IO PLASMA; WATER; ATMOSPHERE; JETS; MARS; WEAK Multiple languages Astronomy & Astrophysics Multiple languages
URI:	http://kups.ub.uni-koeln.de/id/eprint/48712