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Panel D / Chapter 5
Conclusions
25 January 2007


Inputs from the community (1)
Through web site (a few) E-mails to the panel chairs 11 oral contributions during Parallel Session Open discussion (all)

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Inputs from the community (2)
Oral presentations
R. Harrison, L. Klein, N. Vilmer, J.-L. Bougeret (Heliosphere, solar wind, magnetosphere) M. Haberreiter (Total Solar Irrandiance) L. DamИ (High-resolution solar observations) A. Stepanov (Solar flares) V. Gudukova (Ground-based monitoring) J. Souchay (Solar system dynamics) J. Davies (Small bodies) T. Appourchaux (Gravity waves in the Sun)
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Main comments and changes
Heliosphere, solar wind and magnetosphere have not been properly covered
­ Proposal to change Question 1 into: "What can the Sun and the Solar system tell us about astrophysical processes?" ­ Discuss in more detail solar wind, plasma physics, particles and space weather ­ Contributions to § 5.1, 5.2 and 5.3 will be coordinated by Richard Harrison

Introduction will be reformulated to address common issues in solar-system sciences:
­ Data volume and archives ­ Need for long-term synoptic observations
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1. What can the Sun and the Solar System tell us about fundamental astrophysical processes?
Need to go beyond traditional MHD Essential role of microscopic plasma physics Role of the solar wind in carving planetary environments and in driving magnetospheric engine Importance of radio diagnostics and in situ diagnostics Internal structure of the Sun: Need to search for gravity waves Discuss solar abundances (presently in § 5.2)
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2. What drives solar variability on all scales?
Comment: the discussion on solar abundances is not in proper location
­ Proposition: Add this discussion in § 5.1

Comment for § 5.2.2: The total luminosity must be better determined
­ Need for long-term monitoring

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3. What is the impact of solar activity on life on Earth?
Comment: Space weather activity needs to be better emphasized (very strong activity in Europe)
­ ­ To be mentioned in the general introduction Need for long-term monitoring of the space environments of the planets

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4. What is the dynamical history of the solar system?
Reference systems must be mentioned (cf Gaia building of a new reference system)
­ Needed for solar-system dynamics

Formation of the Kuiper belt
­ Need for 4-8m optical telescopes + ELT for TNOs

Reference should be made on migration dynamical models (in Background and Key questions)

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5. What can we learn from solar-system exploration?
Comment: The Solar-system section is too much
fragmented
­ Proposition: Rewrite the introduction of Chapter 5 in enhancing the specificities of Sun and Solar-system observations:
Large data volume, need for archives (cf VO) Need for long-term synoptic observations

Small bodies: need for surveys (NEA, KBO)

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6. Where can we look for life in the Solar System?
Comment: Mention the possible role of asteroid and cometary impacts in the apparition of life on Earth

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Requirements for principal facilities (1)
Large-aperture (3-5m) solar telescope with adaptive optics Solar Orbiter Meter class UV space mission with X-ray capabilities Access to Radio spectral Imaging Capability in cm ­ m band

Recommendations

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Requirements for principal facilities (2)
Mars sample return mission To be considered in the frame of Cosmic Vision:
­ Exploration of Jupiter's and/or Saturn's systems, with special emphasis to Europa, Titan, and Enceladus ­ Mission toward a Near-Earth asteroid ­ Saturn probe mission ­ Mission to Venus ­ 3D Multiscale magnetosphere solar wind analysis

Recommendations

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Requirements for supporting facilities(1)
Network of ground-based, synoptic solar instruments Radio-telescopes arrays, sub-mm and meter (ALMA, LOFAR) Continuous Total Solar Irradiance monitoring Continuous study of ionospheric convection High-resolution multi-objects spectrographs at 4-8m class telescopes

Recommendations

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Requirements for supporting facilities (2)
Access to optical facilities: ELT, JWST Access to sub-millimeter facilities: ALMA, Herschel Continued operation of smaller telescopes Laboratory studies Numerical simulations and theory

Recommendations

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In conclusion...
Thanks to all Panel D participants! Rewriting of § 5.1, 5.2, 5.3 concerning space plasma will be coordinated by Richard. Please send your inputs to Richard and Oskar Please send all your other suggestions (including editorial changes) by E-mail to Oskar and Therese

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