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Observation of a Fully-formed Forward-Reverse Shock Pair due to the Interaction between Two Coronal Mass Ejections at 0.5 au

Trotta, Domenico (author)
Imperial Coll London, Dept Phys, Blackett Lab, London SW7 2AZ, England.
Dimmock, Andrew P. (author)
Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
Blanco-Cano, Xochitl (author)
Univ Nacl Autonoma Mexico, Inst Geofis, Dept Ciencias Espaciales, Ciudad Univ, Ciudad De Mexico 04150, Mexico.
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Forsyth, Robert J. (author)
Imperial Coll London, Dept Phys, Blackett Lab, London SW7 2AZ, England.
Hietala, Heli (author)
Queen Mary Univ London, Dept Phys & Astron, London E1 4NS, England.
Fargette, Nais (author)
Imperial Coll London, Dept Phys, Blackett Lab, London SW7 2AZ, England.
Larosa, Andrea (author)
CNR, Ist Sci & Tecnol Plasmi ISTP, I-70126 Bari, Italy.
Lugaz, Noe (author)
Univ New Hampshire, Space Sci Ctr, Durham, NH 03824 USA.
Palmerio, Erika (author)
Predict Sci Inc, San Diego, CA 92121 USA.
Good, Simon W. (author)
Univ Helsinki, Dept Phys, FI-00014 Helsinki, Finland.
Soljento, Juska E. (author)
Univ Helsinki, Dept Phys, FI-00014 Helsinki, Finland.
Kilpua, Emilia K. J. (author)
Univ Helsinki, Dept Phys, FI-00014 Helsinki, Finland.
Yordanova, Emiliya (author)
Uppsala universitet,Institutet för rymdfysik, Uppsalaavdelningen
Pezzi, Oreste (author)
CNR, Ist Sci & Tecnol Plasmi ISTP, I-70126 Bari, Italy.
Nicolaou, Georgios (author)
Univ Coll London, Dept Space & Climate Phys, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
Horbury, Timothy S. (author)
Imperial Coll London, Dept Phys, Blackett Lab, London SW7 2AZ, England.
Vainio, Rami (author)
Univ Turku, Dept Phys & Astron, FI-20014 Turku, Finland.
Dresing, Nina (author)
Univ Turku, Dept Phys & Astron, FI-20014 Turku, Finland.
Owen, Christopher J. (author)
Univ Coll London, Dept Space & Climate Phys, Mullard Space Sci Lab, Dorking RH5 6NT, Surrey, England.
Wimmer-Schweingruber, Robert F. (author)
Univ Kiel, Inst Expt & Appl Phys, D-24118 Kiel, Germany.
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Imperial Coll London, Dept Phys, Blackett Lab, London SW7 2AZ, England Institutet för rymdfysik, Uppsalaavdelningen (creator_code:org_t)
Institute of Physics Publishing (IOPP), 2024
2024
English.
In: Astrophysical Journal Letters. - : Institute of Physics Publishing (IOPP). - 2041-8205 .- 2041-8213. ; 971:2
Related links:
https://doi.org/10.3...
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https://uu.diva-port... (primary) (Raw object)
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  • Journal article (peer-reviewed)
Abstract Subject headings
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  • 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.

Subject headings

NATURVETENSKAP  -- Fysik -- Astronomi, astrofysik och kosmologi (hsv//swe)
NATURAL SCIENCES  -- Physical Sciences -- Astronomy, Astrophysics and Cosmology (hsv//eng)

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