The Planetary Radio Emissions series of international conferences was initiated in 1984 by H. Rucker and S. Bauder at the University of Graz in Austria. Bauder at the University of Graz in Austria, at a time when the Voyager probes were exploring the outer solar system. By then, Voyager 1 and 2 had already flown past Earth, Jupiter and Saturn, and Voyager 2 was approaching Uranus, paving the way for comparative radio studies of planetary environments. The aim of this conference was to bring together the community working on low-frequency radio emissions and magnetic fields in the magnetosphere, and to give them a longer forum for presenting work in progress than at traditional conferences.

The success of the 1st edition led to the organization of 7 further conferences held in Graz until 2017 at 2-3 year intervals, accompanying space missions carrying radio experiments (Voyager, Wind, Galileo, Cassini, STEREO, Juno, Parker Solar Probe, Solar Orbiter) and low-frequency radio telescopes on the ground (EU, France, Australia, Ukraine). The special feature of these conferences was that they were systematically accompanied by the publication of detailed proceedings - articles in their own right - in a series of books published by the University of Graz, providing invaluable literature on the subject. The PRE VIII edition introduced a system of anonymous review of the articles and referenced them on ADS, making them genuine references that can be cited by the community. All proceedings from editions I-VIII are available online: http://www.austriaca.at/pre

The 9th edition of the conference was organized by a new team in Ireland, at the University of Dublin, with a topic extended to solar and heliospheric emissions, but also extrasolar (through 9 thematic scientific categories), and the addition of a second anonymous reviewer for the proceedings, which have just, at the time of writing, been published online and referenced on ADS: https://www.tara.tcd.ie/handle/2262/103074

The PRE IX organizing team asked France to host the 10th edition, and I’m delighted to have agreed to organize it in Marseille in mid-2025, with the support of the LAM, of which the CNES is the supervisory body, where this discipline is emerging, and with the help of the CNRS, Aix-Marseille University (AMU) and the wider French community. This is a period rich in results, thanks to the Juno mission to Jupiter, Parker Solar Probe and Solar Orbiter in solar orbits, the forthcoming arrival of Bepi-Colombo at Mercury and JUICE (which has just flown over the Earth) at Jupiter, ground-based radio telescopes (NDA/NRH in Nançay, LWA in the USA, UTR-2/URAN-2 in Ukraine, LOFAR in Europe and preparations for SKA) and the re-analysis of rich data archives (Voyager, Galileo, Cassini, NDA).

The PRE conference series is a rare and eagerly-awaited opportunity for our colleagues to present the latest research results on solar system radio and plasma emissions. It now brings together the planetology (historical), solar and heliospheric communities (which have the opportunity to enrich their work outside the bi-annual Solar Wind conference).

The research areas covered by the conference will be similar to those of PRE IX, namely planetary radio emissions (Mercury, Earth, Jupiter, Saturn, Uranus, Neptune), solar and heliospheric radio emissions (corona, solar wind, space meteorology), radio instrumentation (ground and space) with a natural extension to extrasolar radio emissions (interstellar medium, stars, planets and brown dwarfs).

These different objects share the same physics in terms of acceleration processes and wave/plasma instabilities. Observatoire de Paris and LIRA are heavily involved in most of the radio instruments concerned, either directly for instrumental aspects (NDA/NRH/NenuFAR at Nançay, Wind/Waves, Cassini/RPWS, STEREO/Waves, Solar Orbiter/RPW, JUICE/RPWI, Bepi-Colombo/PWI) or indirectly for scientific support (Juno/Waves, PSP/Fields). It is in this capacity that we are seeking its support for the organization of this conference. Recently, these conferences have also enabled us to build bridges with the community involved in large ground-based radio telescopes (with AS SKA-LOFAR in France), which observe stellar, sub-stellar and exoplanetary radio emissions, with over fifty targets detected (a rapidly growing number), which are analyzed in the light of our knowledge acquired in situ in the solar system. In this context, this conference is an effective way of federating the community while awaiting the arrival of SKA, whose Cradle of Life and Galaxy science working groups aim to study radio signals from the solar system and detect/characterize all stellar and planetary radio emitters in the near galactic environment (<15pc).

Preliminary scientific program

The PREX conference will cover a wide range of topics, adressing the radio emission physics of planets, the sun, the heliosphere, exoplanets and stellar objects through the acquisition and analysis of space- and ground-based radio observations, modeling and theoretical work.

Invited speakers :
– What has Juno taught us about Jovian radio emissions ? William Kurth (Univ. of Iowa, USA)
– JUICE/RPWI science objectives at Jupiter and first measurements near Earth, Jan-Erik Wahlund (Uppsala Univ., Sweden)
– Solar radio emissions at the Parker Solar Probe/Solar Orbiter era : Immanuel Jebaraj (Univ. of Turku, Finland)
– Recents advances on solar radio monitoring and space weathering : Jasmina Magdalenic (Univ. of Leuven, Belgium)
– A ground-based perspective of radioastronomy, from historical observations to modern giant facilities : Philippe Zarka (Obs. Paris, France)
– Exoplanets and stellar objects - Where do we stand ? Melody Kao (Univ. of Lowell, USA)