E3 – Commission E3 Solar Impact Throughout the Heliosphere


The entire solar system is influenced by plasma, particle and radiation disturbances launched by the Sun, and their consequences throughout the heliosphere which is the region of space around the Sun dominated by the solar wind.

The impacts of solar variability range from the Sun - Earth relevant processes on time scales of hours and days, to the solar cycle, to the lifetime of the Sun. Solar variability also influences the extension of the heliosphere and the physical process at the boundaries of the heliosphere which arise from interactions with the surrounding interstellar medium and e.g. generate energetic particles that are present in the heliosphere. Interactions at the heliospheric boundaries are also influenced by the changing conditions of the interstellar medium surrounding the Sun, in turn influencing particle components at the high end of the energy spectrum, galactic and anomalous cosmic rays. The solar and heliospheric variability shapes the boundaries of planets and solar system objects to the interplanetary medium, e.g. to the solar wind and its other constituents.

Commission E3 addresses these topics in view of recent observational results and ongoing observations, present top-level science questions and matters that will benefit from coordination in the community.

The Current Top Level Science Questions:

• How does the variable interplanetary medium containing solar wind, solar transients (i.e. CMEs) and their impacts, energetic particles and cosmic dust influence the Earth and the extension of the heliosphere?

•  How does the recent exploration of the edges of the heliosphere with space mission influence our understanding of the heliosphere, its evolution in time and its influence on the Earth?

•  How do small-scale processes shape the heliosphere on large scale?

•  How do solar wind and other interplanetary medium components interact with planets and with other solar system objects?

Commission Web Page

Commission Members (160)

Under Division

Division E Sun and Heliosphere

Claire Foullon

University of Exeter
College of Engineering, Mathematics and Physical Sciences
Centre for Geophysical and Astrophysical Fluid Dynamics
North Park Road
Exeter EX4 4QF
United Kingdom

Phone: +44 01392 725653
Organization website: http://emps.exeter.ac.uk/mathematics/staff/cf337

NCA adherence: United Kingdom

Last updated:
November 20, 2023


National Astronomical Observatory of Japan
National Astronomical Observatory of Japan
ALMA project
2-21-1, Osawa, Mitaka
Tokyo 181-8588

Phone: +81 422 34 3972
Personal website: https://masumishimojo.github.io/MSWebPage/
Organization website: http://www.nao.ac.jp

NCA adherence: Japan

Last updated:
February 2, 2024

Nicole Vilmer

Observatoire Paris-Site de Meudon
5 Pl Jules Janssen
92195 Meudon Cedex

Phone: +33 01 45 07 78 06
Organization website: http://www.lesia.obspm.fr/

NCA adherence: France

Last updated:
November 20, 2023

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