SOlar Wind Heating, Acceleration & Transport (SOWHAT) 2025

Olga Alexandrova — 2025-12-02T16:32:40Z

The aim of the workshop is to discuss the radial expansion of the solar wind, its heating, the acceleration and transport of energy, as indicated by the name of the workshop, SOlar Wind Heating, Acceleration & Transport (SoWhat). We will discuss the solar wind structure on large scales, its origin in relation to coronal structures, non-thermal behavior of charged particles, physical processes such as magnetic reconnection and turbulence in space plasmas.

The workshop is oragnised as follow-up of the PHD thesis defence of Etienne Berriot 1/12/2025, for which Prof. Marco Velli (UCLA), A.Prof. Lorenzo Matteini (Imperial College, London) and Petr Hellinger (IAP Prague) are comming to Paris Observatory. Moreover, Prof. Stuart Bale (SSL, Berkley) and Prof. Eduard Kontar (Univ. Grasgow) are visiting professors in Paris Observatory at the same time. To take advantage of the presence of all these experts in space scince in Meudon, we organise this mini-workshop of 2 days.

Program

02/12/2025, Tuesday

09:30 Salle de conference du Chateau
10:00 Marco Velli, Musings on switchbacks and solar wind origins
11:30 Coffee, Groupe photo
11:50 Alexandra Alexandrova, Round table on "How to advance in our understanding of the Solar Wind ?"

13:00 Lunch

14:30 Petr Hellinger, Plasma turbulence and pressure-strain coupling.
15:00 Jean-Baptiste Dakeyo, On the origins of the solar wind : Source alignments method applied for radial in-situ evolution
15:30 Pascal Demoulin, Active region up-flows : a source of slow SW ?
pause
16:30 Lorenzo Matteini, Magnetic blips in the solar wind : ubiquitous ion-scale solitary structures observed by Solar Orbiter and PSP
17:00 Arnaud Zaslavsky & Erwan Cherier, Solar wind electrons

03/12/2025, Wednesday, Salle de Centre Janssen (ex. CIAS)

09:30 Baptiste Verkampt, "Variation of the Electron Density in the Solar Wind with the Solar Cycle, a diagnostic using Quasi-Thermal Noise Spectroscopy"
10:00 Etienne Berriot, Solar wind radial evolution : statistical study with PSP
10:30 Roland Grappin, Onset of anisotropy and Alfvén waves turbulence in the expanding solar wind
11:00 Coffee
11:30 Ahmed, Spatial Transport and Energy Gain of Relativistic Protons in a CME-perturbed solar wind
12:00 Stuart Bale, Observation of reconnection jets from a filament eruption event

13:00 Lunch

14:00 Eduard Kontar, Turbulence, turbulent cascade and plasma heating in the solar wind : merging remote and in-situ observations
14:30 Tomas Formánek, Polarisation Analysis of Type III Langmuir/Z-mode Waves
Wednesday Afternoon : Free discussions

Centre de Conférences Jules Janssen

SOlar Wind Heating, Acceleration & Transport (SOWHAT) 2025