Connecting the Small Solar Wind Transients Observed Remotely to Their In Situ Measurement near 1 au
Based on the two-vantage observations by the COR2 coronagraphs on board the two STEREO spacecraft between 2010 January 1 and 2010 July 15, we reconstruct the three-dimensional (3D) structures of small solar wind transients in the extended corona and determine their velocities by using the CORrelatio...
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/ade1d7 |
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| author | Shaoyu Lyu Yuming Wang Christopher J. Owen |
| author_facet | Shaoyu Lyu Yuming Wang Christopher J. Owen |
| author_sort | Shaoyu Lyu |
| collection | DOAJ |
| description | Based on the two-vantage observations by the COR2 coronagraphs on board the two STEREO spacecraft between 2010 January 1 and 2010 July 15, we reconstruct the three-dimensional (3D) structures of small solar wind transients in the extended corona and determine their velocities by using the CORrelation-Aided Reconstruction technique. From this data set, we select three small transient events that are predicted to arrive at the L1 point after extrapolating their 3D trajectories in the heliosphere. We find that the predicted trajectories are consistent with the heliospheric observations, and the transients are likely to have also been detected by in situ instruments at L1. The case 1 event is a streamer blob associated with high-density regions across the heliospheric current sheet detected 2 days before the occurrence of a stream interaction region (SIR). The case 2 transient is identified as the bright core of a streamer blowout coronal mass ejection entrained by an SIR, and the case 3 event is merged with the SIR-compressed outflow. The in situ properties related to these events and their ambient plasma flows are consistent with the properties of their source regions, identified after tracing their motion back to the solar surface. This work is an attempt to establish an exact connection between the coronal observations of a small solar wind transient and its in situ measurement at near 1 au and to understand the evolution of solar wind transients in the heliosphere. |
| format | Article |
| id | doaj-art-71810f71fe3945e4ab67f6d151650c8f |
| institution | DOAJ |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-71810f71fe3945e4ab67f6d151650c8f2025-08-20T02:41:13ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01988215210.3847/1538-4357/ade1d7Connecting the Small Solar Wind Transients Observed Remotely to Their In Situ Measurement near 1 auShaoyu Lyu0https://orcid.org/0000-0002-2349-7940Yuming Wang1https://orcid.org/0000-0002-8887-3919Christopher J. Owen2https://orcid.org/0000-0002-5982-4667National Key Laboratory of Deep Space Exploration/School of Earth and Space Sciences, University of Science and Technology of China , Hefei 230026, People’s Republic of China ; ymwang@ustc.edu.cn; CAS Center for Excellence in Comparative Planetology/CAS Key Laboratory of Geospace Environment/Mengcheng National Geophysical Observatory, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Mullard Space Science Laboratory, University College London , Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UKNational Key Laboratory of Deep Space Exploration/School of Earth and Space Sciences, University of Science and Technology of China , Hefei 230026, People’s Republic of China ; ymwang@ustc.edu.cn; CAS Center for Excellence in Comparative Planetology/CAS Key Laboratory of Geospace Environment/Mengcheng National Geophysical Observatory, University of Science and Technology of China , Hefei 230026, People’s Republic of China; Collaborative Innovation Center of Astronautical Science and Technology , Hefei 230026, People’s Republic of ChinaMullard Space Science Laboratory, University College London , Holmbury St. Mary, Dorking, Surrey, RH5 6NT, UKBased on the two-vantage observations by the COR2 coronagraphs on board the two STEREO spacecraft between 2010 January 1 and 2010 July 15, we reconstruct the three-dimensional (3D) structures of small solar wind transients in the extended corona and determine their velocities by using the CORrelation-Aided Reconstruction technique. From this data set, we select three small transient events that are predicted to arrive at the L1 point after extrapolating their 3D trajectories in the heliosphere. We find that the predicted trajectories are consistent with the heliospheric observations, and the transients are likely to have also been detected by in situ instruments at L1. The case 1 event is a streamer blob associated with high-density regions across the heliospheric current sheet detected 2 days before the occurrence of a stream interaction region (SIR). The case 2 transient is identified as the bright core of a streamer blowout coronal mass ejection entrained by an SIR, and the case 3 event is merged with the SIR-compressed outflow. The in situ properties related to these events and their ambient plasma flows are consistent with the properties of their source regions, identified after tracing their motion back to the solar surface. This work is an attempt to establish an exact connection between the coronal observations of a small solar wind transient and its in situ measurement at near 1 au and to understand the evolution of solar wind transients in the heliosphere.https://doi.org/10.3847/1538-4357/ade1d7HeliosphereSolar coronaSlow solar wind |
| spellingShingle | Shaoyu Lyu Yuming Wang Christopher J. Owen Connecting the Small Solar Wind Transients Observed Remotely to Their In Situ Measurement near 1 au The Astrophysical Journal Heliosphere Solar corona Slow solar wind |
| title | Connecting the Small Solar Wind Transients Observed Remotely to Their In Situ Measurement near 1 au |
| title_full | Connecting the Small Solar Wind Transients Observed Remotely to Their In Situ Measurement near 1 au |
| title_fullStr | Connecting the Small Solar Wind Transients Observed Remotely to Their In Situ Measurement near 1 au |
| title_full_unstemmed | Connecting the Small Solar Wind Transients Observed Remotely to Their In Situ Measurement near 1 au |
| title_short | Connecting the Small Solar Wind Transients Observed Remotely to Their In Situ Measurement near 1 au |
| title_sort | connecting the small solar wind transients observed remotely to their in situ measurement near 1 au |
| topic | Heliosphere Solar corona Slow solar wind |
| url | https://doi.org/10.3847/1538-4357/ade1d7 |
| work_keys_str_mv | AT shaoyulyu connectingthesmallsolarwindtransientsobservedremotelytotheirinsitumeasurementnear1au AT yumingwang connectingthesmallsolarwindtransientsobservedremotelytotheirinsitumeasurementnear1au AT christopherjowen connectingthesmallsolarwindtransientsobservedremotelytotheirinsitumeasurementnear1au |