Observation of a Fully-formed Forward–Reverse Shock Pair due to the Interaction between Two Coronal Mass Ejections at 0.5 au
Abstract We report direct observations of a fast magnetosonic forward–reverse shock pair observed by Solar Orbiter on 2022 March 8 at the short heliocentric distance of 0.5 au. The structure, sharing some features with fully-formed stream interaction regions, is due to the interaction between two successive coronal mass ejections (CMEs), never previously observed to give rise to a forward–reverse shock pair. The scenario is supported by remote observations from extreme ultraviolet cameras and coronagraphs, where two candidate eruptions compatible with the in situ signatures have been found. In the interaction region, we find enhanced energetic particle activity, strong nonradial flow deflections, and evidence of magnetic reconnection. At 1 au, well radially aligned Wind observations reveal a complex event, with characteristic observational signatures of both stream interaction region and CME–CME interaction, thus demonstrating the importance of investigating the complex dynamics governing solar eruptive phenomena.
Authors
- Oreste Pezzi (ORCID: https://orcid.org/0000-0002-7638-1706)
- Juska Soljento (ORCID: https://orcid.org/0000-0003-2495-8881)
- A. P. Dimmock (ORCID: https://orcid.org/0000-0003-1589-6711)
- N. Dresing (ORCID: https://orcid.org/0000-0003-3903-4649)
- Emilia Kilpua (ORCID: https://orcid.org/0000-0002-4489-8073)
- T. S. Horbury (ORCID: https://orcid.org/0000-0002-7572-4690)
- Emiliya Yordanova (ORCID: https://orcid.org/0000-0002-9707-3147)
- Heli Hietala (ORCID: https://orcid.org/0000-0002-3039-1255)
- A. Larosa (ORCID: https://orcid.org/0000-0002-7653-9147)
- Erika Palmerio (ORCID: https://orcid.org/0000-0001-6590-3479)
- Christopher John Owen (ORCID: https://orcid.org/0000-0002-5982-4667)
- Naïs Fargette (ORCID: https://orcid.org/0000-0001-6308-1715)
- Domenico Trotta (ORCID: https://orcid.org/0000-0002-0608-8897)
- Georgios Nicolaou (ORCID: https://orcid.org/0000-0003-3623-4928)
- R. F. Wimmer‐Schweingruber (ORCID: https://orcid.org/0000-0002-7388-173X)
- X. Blanco‐Cano (ORCID: https://orcid.org/0000-0001-7171-0673)
- Simon Good (ORCID: https://orcid.org/0000-0002-4921-4208)
- Rami Vainio (ORCID: https://orcid.org/0000-0002-3298-2067)
- R. J. Forsyth (ORCID: https://orcid.org/0000-0003-2701-0375)
- Noé Lugaz (ORCID: https://orcid.org/0000-0002-1890-6156)
Publication Details
- Journal
- The Astrophysical Journal Letters
- Published
- 2024-08-01
- DOI
- https://doi.org/10.3847/2041-8213/ad68fa
- Citations
- 9
- Primary Topic
- Solar and Space Plasma Dynamics
- Type
- article
- Field-Weighted Citation Impact
- 2.98
Funders
- National Aeronautics and Space Administration
- UK Space Agency
- UK Research and Innovation
- Ministerio de Ciencia, Innovación y Universidades
- Royal Society
- European Commission
- Swedish National Space Agency
- Academy of Finland
- Centre National d’Etudes Spatiales
- Nuclear Safety and Security Commission
- Agenzia Spaziale Italiana
- Centre National de la Recherche Scientifique
- Science and Technology Facilities Council
- Dirección General de Asuntos del Personal Académico, Universidad Nacional Autónoma de México
- Agencia Estatal de Investigación