Ion acceleration in Fermi-LAT behind-the-limb solar flares: the role of coronal shock waves
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arXiv
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| Autori principali: | , , , |
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| Natura: | Preprint |
| Pubblicazione: |
2025
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| _version_ | 1866909684387020800 |
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| author | Warmuth, Alexander Pesce-Rollins, Melissa Omodei, Nicola Tan, Song |
| author_facet | Warmuth, Alexander Pesce-Rollins, Melissa Omodei, Nicola Tan, Song |
| contents | We investigate the relationship between the gamma-ray emission measured with Fermi-LAT and radio signatures of coronal shock waves in four behind-the-limb (BTL) solar flares. All events were associated with metric type II radio burst. Both start and end times of the radio bursts were synchronized with the gamma-ray emission. The type II bursts associated with the BTL gamma-ray flares had higher speeds and lower formation heights than those of an average sample. These findings support the notion that the highly relativistic ions that produce the gamma-rays in BTL flares are accelerated at CME-driven propagating coronal shock waves rather than in large-scale coronal loops. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_08452 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Ion acceleration in Fermi-LAT behind-the-limb solar flares: the role of coronal shock waves Warmuth, Alexander Pesce-Rollins, Melissa Omodei, Nicola Tan, Song Solar and Stellar Astrophysics High Energy Astrophysical Phenomena We investigate the relationship between the gamma-ray emission measured with Fermi-LAT and radio signatures of coronal shock waves in four behind-the-limb (BTL) solar flares. All events were associated with metric type II radio burst. Both start and end times of the radio bursts were synchronized with the gamma-ray emission. The type II bursts associated with the BTL gamma-ray flares had higher speeds and lower formation heights than those of an average sample. These findings support the notion that the highly relativistic ions that produce the gamma-rays in BTL flares are accelerated at CME-driven propagating coronal shock waves rather than in large-scale coronal loops. |
| title | Ion acceleration in Fermi-LAT behind-the-limb solar flares: the role of coronal shock waves |
| topic | Solar and Stellar Astrophysics High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2507.08452 |