Statistics of the Interplanetary Magnetic Field from 0.1 to 30 au. I. Distribution Character
This study investigates the directional and intensity distributions of the interplanetary magnetic field (IMF) across a heliocentric distance range of approximately 0.1–30 au. Measurements from multiple spacecraft reveal that these distributions align closely with the Parker spiral configuration in...
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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/ad9b28 |
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| author | Jiutong Zhao Shan Wang Weijie Sun Xingyu Zhu Chuanpeng Hou Qiugang Zong Jiansen He Xuzhi Zhou Chao Yue Liu Yang |
| author_facet | Jiutong Zhao Shan Wang Weijie Sun Xingyu Zhu Chuanpeng Hou Qiugang Zong Jiansen He Xuzhi Zhou Chao Yue Liu Yang |
| author_sort | Jiutong Zhao |
| collection | DOAJ |
| description | This study investigates the directional and intensity distributions of the interplanetary magnetic field (IMF) across a heliocentric distance range of approximately 0.1–30 au. Measurements from multiple spacecraft reveal that these distributions align closely with the Parker spiral configuration in general. Nevertheless, the deviation from the model is significant and regular. To analyze these deviations, we organized the IMF observations based on the orientation and intensity predicted by the Parker model. The average angular deviation from the Parker spiral increases between 0.1 and 1 au, stabilizing from 1 to 30 au. The magnetic field components perpendicular to the Parker spiral are more likely to lay in the latitudinal and longitudinal directions during the solar maximum and minimum, respectively. The normalized intensity distribution follows a log-normal distribution, with its broadening positively correlated with increasing heliocentric distance. These characteristics cannot be fully attributed to Alfvénic fluctuations or the nonradial component near the potential field source surface. Instead, interactions of flux tubes in the outer heliosphere play a significant role in shaping the IMF. Our results provide a comprehensive assessment of the frequency with which planets encounter non-Parker upstream conditions. |
| format | Article |
| id | doaj-art-69a40ecdcf7342e895452d4278b6a0ff |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-69a40ecdcf7342e895452d4278b6a0ff2025-02-05T16:19:42ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-0198018910.3847/1538-4357/ad9b28Statistics of the Interplanetary Magnetic Field from 0.1 to 30 au. I. Distribution CharacterJiutong Zhao0https://orcid.org/0000-0003-0263-4878Shan Wang1Weijie Sun2https://orcid.org/0000-0001-5260-658XXingyu Zhu3Chuanpeng Hou4Qiugang Zong5https://orcid.org/0000-0002-6414-3794Jiansen He6https://orcid.org/0000-0001-8179-417XXuzhi Zhou7Chao Yue8https://orcid.org/0000-0001-9720-5210Liu Yang9School of Earth and Space Sciences, Peking University , Beijing 100871, People’s Republic of China ; qgzong@pku.edu.cnSchool of Earth and Space Sciences, Peking University , Beijing 100871, People’s Republic of China ; qgzong@pku.edu.cnSpace Sciences Laboratory, University of California , Berkeley, CA, 94720, USACenter for Space Plasma and Aeronomic Research (CSPAR), The University of Alabama in Huntsville , Huntsville, AL 35805, USASchool of Earth and Space Sciences, Peking University , Beijing 100871, People’s Republic of China ; qgzong@pku.edu.cnSchool of Earth and Space Sciences, Peking University , Beijing 100871, People’s Republic of China ; qgzong@pku.edu.cnSchool of Earth and Space Sciences, Peking University , Beijing 100871, People’s Republic of China ; qgzong@pku.edu.cnSchool of Earth and Space Sciences, Peking University , Beijing 100871, People’s Republic of China ; qgzong@pku.edu.cnSchool of Earth and Space Sciences, Peking University , Beijing 100871, People’s Republic of China ; qgzong@pku.edu.cnInstitut für Experimentelle und Angewandte Physik, Christian-Albrechts-Universität zu Kiel , 24118 Kiel, GermanyThis study investigates the directional and intensity distributions of the interplanetary magnetic field (IMF) across a heliocentric distance range of approximately 0.1–30 au. Measurements from multiple spacecraft reveal that these distributions align closely with the Parker spiral configuration in general. Nevertheless, the deviation from the model is significant and regular. To analyze these deviations, we organized the IMF observations based on the orientation and intensity predicted by the Parker model. The average angular deviation from the Parker spiral increases between 0.1 and 1 au, stabilizing from 1 to 30 au. The magnetic field components perpendicular to the Parker spiral are more likely to lay in the latitudinal and longitudinal directions during the solar maximum and minimum, respectively. The normalized intensity distribution follows a log-normal distribution, with its broadening positively correlated with increasing heliocentric distance. These characteristics cannot be fully attributed to Alfvénic fluctuations or the nonradial component near the potential field source surface. Instead, interactions of flux tubes in the outer heliosphere play a significant role in shaping the IMF. Our results provide a comprehensive assessment of the frequency with which planets encounter non-Parker upstream conditions.https://doi.org/10.3847/1538-4357/ad9b28Interplanetary magnetic fieldsSolar windPlanetary magnetospheres |
| spellingShingle | Jiutong Zhao Shan Wang Weijie Sun Xingyu Zhu Chuanpeng Hou Qiugang Zong Jiansen He Xuzhi Zhou Chao Yue Liu Yang Statistics of the Interplanetary Magnetic Field from 0.1 to 30 au. I. Distribution Character The Astrophysical Journal Interplanetary magnetic fields Solar wind Planetary magnetospheres |
| title | Statistics of the Interplanetary Magnetic Field from 0.1 to 30 au. I. Distribution Character |
| title_full | Statistics of the Interplanetary Magnetic Field from 0.1 to 30 au. I. Distribution Character |
| title_fullStr | Statistics of the Interplanetary Magnetic Field from 0.1 to 30 au. I. Distribution Character |
| title_full_unstemmed | Statistics of the Interplanetary Magnetic Field from 0.1 to 30 au. I. Distribution Character |
| title_short | Statistics of the Interplanetary Magnetic Field from 0.1 to 30 au. I. Distribution Character |
| title_sort | statistics of the interplanetary magnetic field from 0 1 to 30 au i distribution character |
| topic | Interplanetary magnetic fields Solar wind Planetary magnetospheres |
| url | https://doi.org/10.3847/1538-4357/ad9b28 |
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