Venusian ion escape under extreme conditions: A dynamic pressure and temperature simulation study
Context . We investigated the response of the Venusian atmospheric ion escape under the effect of interplanetary coronal mass ejections (ICMEs) using the Latmos Hybrid Simulation (LatHyS). Aims . In particular, we focused on the influence of extreme ICME dynamic pressures and temperatures, with the temperature being a parameter that has not been extensively studied in the past. Methods . Simulations were performed for two different dynamic pressures and three different temperatures. For the case of the dynamic pressure simulations, a density and a velocity enhancement event were studied separately. The H + and O + ion escape was then examined and compared for different escape channels. Results . In both dynamic pressure enhancement cases, we find that there is no clear dependence of the O + ion escape on the dynamic pressure, which is consistent with observations. On the other hand, the temperature of the incoming solar wind positively influences the H + and O + ion escape. This is attributed in part to the enhanced gyroradius of the particles, which allows them to penetrate deeper into the planet’s atmosphere.
Authors
- Maria Chloi Katrougkalou (ORCID: https://orcid.org/0000-0001-6252-262X)
- R. Modolo (ORCID: https://orcid.org/0000-0001-5437-9923)
- Tomas Karlsson (ORCID: https://orcid.org/0000-0002-4546-5050)
- Moa Persson (ORCID: https://orcid.org/0000-0003-3497-3209)
- Anita Kullen
- Erwan Jariel
- Sae Aizawa (ORCID: https://orcid.org/0000-0002-3483-3444)
- Nicolás André (ORCID: https://orcid.org/0000-0001-8017-5676)
Institutions
- Centre National de la Recherche Scientifique (FR)
- Swedish Institute of Space Physics (SE)
- Université Toulouse III - Paul Sabatier (FR)
- Université Fédérale de Toulouse Midi-Pyrénées (FR)
- Institut Superieur de l'Aeronautique et de l'Espace (ISAE-SUPAERO) (FR)
- Université de Versailles Saint-Quentin-en-Yvelines (FR)
- Université Paris-Saclay (FR)
- Sorbonne Université (FR)
- Institut Pierre-Simon Laplace (FR)
- National Sagamihara Hospital (JP)
- Thales (France) (FR)
- Laboratoire de Physique des Plasmas (FR)
- Laboratoire atmosphères, milieux, observations spatiales (FR)
- KTH Royal Institute of Technology (SE)
Publication Details
- Journal
- Astronomy and Astrophysics
- Published
- 2024-10-14
- DOI
- https://doi.org/10.1051/0004-6361/202449326
- Primary Topic
- Planetary Science and Exploration
- Type
- article
- Field-Weighted Citation Impact
- 0.00
Funders
- European Commission
- Centre National d’Etudes Spatiales
- Japan Society for the Promotion of Science