CME Deflection and East-West Asymmetry of ESP Intensity in Solar Cycles 23 and 24
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arXiv
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| Autores principales: | , , , , , , |
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| Formato: | Preprint |
| Publicado: |
2024
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| _version_ | 1866916189532323840 |
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| author | Dueñas, Adolfo Santa Fe Ebert, Robert W. Li, Gang Ding, Zheyi Dayeh, Maher A. Desai, Mihir I. Jian, Lan K. |
| author_facet | Dueñas, Adolfo Santa Fe Ebert, Robert W. Li, Gang Ding, Zheyi Dayeh, Maher A. Desai, Mihir I. Jian, Lan K. |
| contents | We investigate the East-West asymmetry in energetic storm particle (ESP) heavy ion intensities at interplanetary shocks driven by coronal mass ejections (CMEs) during solar cycles (SCs) 23 and 24. We use observations from NASA's ACE and STEREO missions of helium (He), oxygen (O), and iron (Fe) intensities from ~0.13 to 3 MeV/nucleon. We examine the longitudinal distribution of ESP intensities and the correlation of ESP intensities with the near-Sun CME speed and the average transit CME speed for eastern and western events. We observed an East-West asymmetry reversal of ESP heavy ion intensities from SC 23 to 24. We have determined that this change in asymmetry is caused by a shift in the heliolongitude distribution of the CME speed ratio (the ratio of CME near-Sun speed to CME average transit speed) from west to east. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2404_01993 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | CME Deflection and East-West Asymmetry of ESP Intensity in Solar Cycles 23 and 24 Dueñas, Adolfo Santa Fe Ebert, Robert W. Li, Gang Ding, Zheyi Dayeh, Maher A. Desai, Mihir I. Jian, Lan K. Solar and Stellar Astrophysics Earth and Planetary Astrophysics High Energy Astrophysical Phenomena Plasma Physics Space Physics We investigate the East-West asymmetry in energetic storm particle (ESP) heavy ion intensities at interplanetary shocks driven by coronal mass ejections (CMEs) during solar cycles (SCs) 23 and 24. We use observations from NASA's ACE and STEREO missions of helium (He), oxygen (O), and iron (Fe) intensities from ~0.13 to 3 MeV/nucleon. We examine the longitudinal distribution of ESP intensities and the correlation of ESP intensities with the near-Sun CME speed and the average transit CME speed for eastern and western events. We observed an East-West asymmetry reversal of ESP heavy ion intensities from SC 23 to 24. We have determined that this change in asymmetry is caused by a shift in the heliolongitude distribution of the CME speed ratio (the ratio of CME near-Sun speed to CME average transit speed) from west to east. |
| title | CME Deflection and East-West Asymmetry of ESP Intensity in Solar Cycles 23 and 24 |
| topic | Solar and Stellar Astrophysics Earth and Planetary Astrophysics High Energy Astrophysical Phenomena Plasma Physics Space Physics |
| url | https://arxiv.org/abs/2404.01993 |