The Astrophysical Journal (Jan 2024)
Properties of an Interplanetary Shock Observed at 0.07 and 0.7 au by Parker Solar Probe and Solar Orbiter
- Domenico Trotta,
- Andrea Larosa,
- Georgios Nicolaou,
- Timothy S. Horbury,
- Lorenzo Matteini,
- Heli Hietala,
- Xochitl Blanco-Cano,
- Luca Franci,
- C. H. K Chen,
- Lingling Zhao,
- Gary P. Zank,
- Christina M. S. Cohen,
- Stuart D. Bale,
- Ronan Laker,
- Nais Fargette,
- Francesco Valentini,
- Yuri Khotyaintsev,
- Rungployphan Kieokaew,
- Nour Raouafi,
- Emma Davies,
- Rami Vainio,
- Nina Dresing,
- Emilia Kilpua,
- Tomas Karlsson,
- Christopher J. Owen,
- Robert F. Wimmer-Schweingruber
Affiliations
- Domenico Trotta
- ORCiD
- The Blackett Laboratory, Department of Physics, Imperial College London , London, SW7 2AZ, UK ; [email protected]
- Andrea Larosa
- ORCiD
- Department of Physics and Astronomy, Queen Mary University of London , London, E1 4NS, UK
- Georgios Nicolaou
- ORCiD
- Department of Space and Climate Physics, Mullard Space Science Laboratory, University College London , Dorking, Surrey, RH5 6NT, UK
- Timothy S. Horbury
- ORCiD
- The Blackett Laboratory, Department of Physics, Imperial College London , London, SW7 2AZ, UK ; [email protected]
- Lorenzo Matteini
- ORCiD
- The Blackett Laboratory, Department of Physics, Imperial College London , London, SW7 2AZ, UK ; [email protected]
- Heli Hietala
- ORCiD
- Department of Physics and Astronomy, Queen Mary University of London , London, E1 4NS, UK
- Xochitl Blanco-Cano
- ORCiD
- Departamento de Ciencias Espaciales, Instituto de Geofísica, Universidad Nacional Autónoma de México , Ciudad Universitaria, Ciudad de México, Mexico
- Luca Franci
- ORCiD
- The Blackett Laboratory, Department of Physics, Imperial College London , London, SW7 2AZ, UK ; [email protected]
- C. H. K Chen
- ORCiD
- Department of Physics and Astronomy, Queen Mary University of London , London, E1 4NS, UK
- Lingling Zhao
- ORCiD
- Center for Space Plasma and Aeronomic Research (CSPAR), University of Alabama in Huntsville , Huntsville, AL 35805, USA; Department of Space Science, University of Alabama in Huntsville , Huntsville, AL 35899, USA
- Gary P. Zank
- ORCiD
- Center for Space Plasma and Aeronomic Research (CSPAR), University of Alabama in Huntsville , Huntsville, AL 35805, USA; Department of Space Science, University of Alabama in Huntsville , Huntsville, AL 35899, USA
- Christina M. S. Cohen
- ORCiD
- California Institute of Technology , Pasadena, CA 91125, USA
- Stuart D. Bale
- ORCiD
- Physics Department, University of California , Berkeley, CA 94720-7300, USA; Space Sciences Laboratory, University of California , Berkeley, CA 94720-7450, USA
- Ronan Laker
- ORCiD
- The Blackett Laboratory, Department of Physics, Imperial College London , London, SW7 2AZ, UK ; [email protected]
- Nais Fargette
- ORCiD
- The Blackett Laboratory, Department of Physics, Imperial College London , London, SW7 2AZ, UK ; [email protected]
- Francesco Valentini
- ORCiD
- Dipartimento di Fisica, University of Calabria , Rende I-87036, Italy
- Yuri Khotyaintsev
- ORCiD
- Swedish Institute of Space Physics , Uppsala, Sweden
- Rungployphan Kieokaew
- ORCiD
- Institut de Recherche en Astrophysique et Planétologie , CNRS, UPS, CNES, 9 Ave. du Colonel Roche F-31028 Toulouse, France
- Nour Raouafi
- ORCiD
- Johns Hopkins Applied Physics Laboratory , Laurel, MD 20723, USA
- Emma Davies
- ORCiD
- Austrian Space Weather Office , GeoSphere Austria, A-8020 Graz, Austria
- Rami Vainio
- ORCiD
- Department of Physics and Astronomy, University of Turku , FI-20014 Turku, Finland
- Nina Dresing
- ORCiD
- Department of Physics and Astronomy, University of Turku , FI-20014 Turku, Finland
- Emilia Kilpua
- ORCiD
- Department of Physics, University of Helsinki , Helsinki, Finland
- Tomas Karlsson
- ORCiD
- KTH Royal Institute of Technology , Stockholm, Sweden
- Christopher J. Owen
- ORCiD
- Department of Space and Climate Physics, Mullard Space Science Laboratory, University College London , Dorking, Surrey, RH5 6NT, UK
- Robert F. Wimmer-Schweingruber
- ORCiD
- Institute of Experimental and Applied Physics, Kiel University , D-24118 Kiel, Germany
- DOI
- https://doi.org/10.3847/1538-4357/ad187d
- Journal volume & issue
-
Vol. 962,
no. 2
p. 147
Abstract
The Parker Solar Probe (PSP) and Solar Orbiter (SolO) missions opened a new observational window in the inner heliosphere, which is finally accessible to direct measurements. On 2022 September 5, a coronal mass ejection (CME)-driven interplanetary (IP) shock was observed as close as 0.07 au by PSP. The CME then reached SolO, which was radially well-aligned at 0.7 au, thus providing us with the opportunity to study the shock properties at different heliocentric distances. We characterize the shock, investigate its typical parameters, and compare its small-scale features at both locations. Using the PSP observations, we investigate how magnetic switchbacks and ion cyclotron waves are processed upon shock crossing. We find that switchbacks preserve their V–B correlation while compressed upon the shock passage, and that the signature of ion cyclotron waves disappears downstream of the shock. By contrast, the SolO observations reveal a very structured shock transition, with a population of shock-accelerated protons of up to about 2 MeV, showing irregularities in the shock downstream, which we correlate with solar wind structures propagating across the shock. At SolO, we also report the presence of low-energy (∼100 eV) electrons scattering due to upstream shocklets. This study elucidates how the local features of IP shocks and their environments can be very different as they propagate through the heliosphere.
Keywords
