ST1.4

Magnetic Topology, Pondemorotive Forces and Energetic Particles in the Solar System
Convener: Claire Foullon  | Co-Conveners: Harald Kucharek , Olga Malandraki , Rickard Lundin 
Oral Programme
 / Wed, 05 May, 08:30–12:00  / Room 26
Poster Programme
 / Attendance Wed, 05 May, 17:30–19:00  / Hall XL
Magnetic Topology and Energetic Particles in the Solar System
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Convener: Claire Foullon
Co-Conveners: Harald Kucharek, Olga Malandraki

This session is a forum with special emphasis on energetic particles arising in the slow and fast solar wind, co-rotating interactions regions, interplanetary or planetary shocks and foreshock regions, and from magnetic reconnection events such as solar flares. Remote or in-situ observations of the particle populations in the solar system are continuously ongoing owing to several dedicated spacecraft missions (from new generations of spacecraft like STEREO and THEMIS and earlier ones like ACE, SOHO, WIND, Cluster, RHESSI, etc.). Their measurements, the associated data analysis, as well as theoretical considerations provide crucial information for understanding the sources of the particle populations, their acceleration and propagation/transport processes. Magnetic topology plays an important role through parallel and perpendicular shock geometries, the trapping of the energetic particles and re-acceleration from long-lived acceleration sites. This session invites contributions on a wide range of theoretical, modeling and observational topics. The signatures of the various forms of plasma interactions, the effects of dynamically evolving magnetic field configurations such as resonant magnetic field lines or expanding flux ropes, or using the particles to probe the magnetic topology of the structures they originate from are highly relevant.

Solicited people: Lyndsay Fletcher, lyndsay@astro.gla.ac.uk; Sam Krucker, krucker@ssl.berkeley.edu; Vladimir Krasnosselskikh, vkrasnos@cnrs-orleans.fr; Mihir Desai, mdesai@swri.edu.

Ponderomotive forces by Alfvèn waves in the Solar system
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Convener: Rickard Lundin
Co-Convener: Anatol Guglielmi

The Session is expected to bring together scientists with interest in space plasma acceleration processes, in particular acceleration due to ponderomotive forces induced by Alfvèn waves. We welcome contributions in the following three main topics:

(1) Ponderomotive forces in the Earth’s magnetosphere.
(2) Ponderomotive forces in the magnetospheres of other planets.
(3) Ponderomotive forces in the solar corona and solar wind including the outer heliosphere.

Miscellaneous auxiliary topics may also be of interest, such as geomagnetic field inversions and the problem of helium escape, ponderomotive forces and the evolution of protoplanetary nebulae. Moreover, the notion of Forces in Nature in general, from Galileo up to modern times, is of interest. Other types of wave - particle interaction approaches (by magnetosonic, ion-cyclotron waves, etc.) and the related particle acceleration (e.g., quasi-electrostatic, centrifugal, etc.) may contribute in furthering the understanding of ponderomotive forcing by Alfvèn waves. Basics theory, satellite and ground-based observations are necessary ingredients in the Session. Our goal is to provide a forum for active discussions, offering new ideas of how to reduce the gap between observations and theory in solar-terrestrial physics. The Session is devoted to the 60th anniversary of the publication of the eminent book “Cosmic Electrodynamics” by Hannes Alfvèn (Oxford: Clarendon Press, 1950), which has played such an outstanding role in the advancement of Space physics. The plan is to have papers presented at the Session published in a Special Issue of the Journal of Atmospheric and Solar-Terrestrial Physics.

Solicited people: Padma Kant Shukla, profshukla@yahoo.de; Hans Nilsson, hans.nilsson@irf.se
Related event: SPM1.21 – Magnetic Topology and Energetic Particles in the Solar System (public)
Wed, 05 May, 13:30–17:00  / Room SM2