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Parker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near‐Sun Heliospheric Current Sheet
We report observations of reconnection exhausts in the Heliospheric Current Sheet (HCS) during Parker Solar Probe Encounters 08 and 07, at 16 R ( s ) and 20 R ( s ), respectively. Heliospheric current sheet (HCS) reconnection accelerated protons to almost twice the solar wind speed and increased the...
Autores principales: | , , , , , , , , , , , , , , , , , , , , , , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
John Wiley and Sons Inc.
2022
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286436/ https://www.ncbi.nlm.nih.gov/pubmed/35864893 http://dx.doi.org/10.1029/2021GL096986 |
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author | Phan, T. D. Verniero, J. L. Larson, D. Lavraud, B. Drake, J. F. Øieroset, M. Eastwood, J. P. Bale, S. D. Livi, R. Halekas, J. S. Whittlesey, P. L. Rahmati, A. Stansby, D. Pulupa, M. MacDowall, R. J. Szabo, P. A. Koval, A. Desai, M. Fuselier, S. A. Velli, M. Hesse, M. Pyakurel, P. S. Maheshwari, K. Kasper, J. C. Stevens, J. M. Case, A. W. Raouafi, N. E. |
author_facet | Phan, T. D. Verniero, J. L. Larson, D. Lavraud, B. Drake, J. F. Øieroset, M. Eastwood, J. P. Bale, S. D. Livi, R. Halekas, J. S. Whittlesey, P. L. Rahmati, A. Stansby, D. Pulupa, M. MacDowall, R. J. Szabo, P. A. Koval, A. Desai, M. Fuselier, S. A. Velli, M. Hesse, M. Pyakurel, P. S. Maheshwari, K. Kasper, J. C. Stevens, J. M. Case, A. W. Raouafi, N. E. |
author_sort | Phan, T. D. |
collection | PubMed |
description | We report observations of reconnection exhausts in the Heliospheric Current Sheet (HCS) during Parker Solar Probe Encounters 08 and 07, at 16 R ( s ) and 20 R ( s ), respectively. Heliospheric current sheet (HCS) reconnection accelerated protons to almost twice the solar wind speed and increased the proton core energy by a factor of ∼3, due to the Alfvén speed being comparable to the solar wind flow speed at these near‐Sun distances. Furthermore, protons were energized to super‐thermal energies. During E08, energized protons were found to have leaked out of the exhaust along separatrix field lines, appearing as field‐aligned energetic proton beams in a broad region outside the HCS. Concurrent dropouts of strahl electrons, indicating disconnection from the Sun, provide further evidence for the HCS being the source of the beams. Around the HCS in E07, there were also proton beams but without electron strahl dropouts, indicating that their origin was not the local HCS reconnection exhaust. |
format | Online Article Text |
id | pubmed-9286436 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2022 |
publisher | John Wiley and Sons Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-92864362022-07-19 Parker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near‐Sun Heliospheric Current Sheet Phan, T. D. Verniero, J. L. Larson, D. Lavraud, B. Drake, J. F. Øieroset, M. Eastwood, J. P. Bale, S. D. Livi, R. Halekas, J. S. Whittlesey, P. L. Rahmati, A. Stansby, D. Pulupa, M. MacDowall, R. J. Szabo, P. A. Koval, A. Desai, M. Fuselier, S. A. Velli, M. Hesse, M. Pyakurel, P. S. Maheshwari, K. Kasper, J. C. Stevens, J. M. Case, A. W. Raouafi, N. E. Geophys Res Lett Research Letter We report observations of reconnection exhausts in the Heliospheric Current Sheet (HCS) during Parker Solar Probe Encounters 08 and 07, at 16 R ( s ) and 20 R ( s ), respectively. Heliospheric current sheet (HCS) reconnection accelerated protons to almost twice the solar wind speed and increased the proton core energy by a factor of ∼3, due to the Alfvén speed being comparable to the solar wind flow speed at these near‐Sun distances. Furthermore, protons were energized to super‐thermal energies. During E08, energized protons were found to have leaked out of the exhaust along separatrix field lines, appearing as field‐aligned energetic proton beams in a broad region outside the HCS. Concurrent dropouts of strahl electrons, indicating disconnection from the Sun, provide further evidence for the HCS being the source of the beams. Around the HCS in E07, there were also proton beams but without electron strahl dropouts, indicating that their origin was not the local HCS reconnection exhaust. John Wiley and Sons Inc. 2022-05-04 2022-05-16 /pmc/articles/PMC9286436/ /pubmed/35864893 http://dx.doi.org/10.1029/2021GL096986 Text en © 2022. The Authors. https://creativecommons.org/licenses/by-nc-nd/4.0/This is an open access article under the terms of the http://creativecommons.org/licenses/by-nc-nd/4.0/ (https://creativecommons.org/licenses/by-nc-nd/4.0/) License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made. |
spellingShingle | Research Letter Phan, T. D. Verniero, J. L. Larson, D. Lavraud, B. Drake, J. F. Øieroset, M. Eastwood, J. P. Bale, S. D. Livi, R. Halekas, J. S. Whittlesey, P. L. Rahmati, A. Stansby, D. Pulupa, M. MacDowall, R. J. Szabo, P. A. Koval, A. Desai, M. Fuselier, S. A. Velli, M. Hesse, M. Pyakurel, P. S. Maheshwari, K. Kasper, J. C. Stevens, J. M. Case, A. W. Raouafi, N. E. Parker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near‐Sun Heliospheric Current Sheet |
title | Parker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near‐Sun Heliospheric Current Sheet |
title_full | Parker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near‐Sun Heliospheric Current Sheet |
title_fullStr | Parker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near‐Sun Heliospheric Current Sheet |
title_full_unstemmed | Parker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near‐Sun Heliospheric Current Sheet |
title_short | Parker Solar Probe Observations of Solar Wind Energetic Proton Beams Produced by Magnetic Reconnection in the Near‐Sun Heliospheric Current Sheet |
title_sort | parker solar probe observations of solar wind energetic proton beams produced by magnetic reconnection in the near‐sun heliospheric current sheet |
topic | Research Letter |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9286436/ https://www.ncbi.nlm.nih.gov/pubmed/35864893 http://dx.doi.org/10.1029/2021GL096986 |
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