Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-scale Flux Emergence
Despite decades of research, the fundamental processes involved in the initiation and acceleration of solar eruptions remain not fully understood, making them long-standing and challenging problems in solar physics. Recent high-resolution observations by the Goode Solar Telescope have revealed small...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal Letters |
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| Online Access: | https://doi.org/10.3847/2041-8213/adeab2 |
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| author | Satoshi Inoue Takahiro Miyoshi Keiji Hayashi Huu Minh Triet Nguyen Ju Jing Wenda Cao Haimin Wang |
| author_facet | Satoshi Inoue Takahiro Miyoshi Keiji Hayashi Huu Minh Triet Nguyen Ju Jing Wenda Cao Haimin Wang |
| author_sort | Satoshi Inoue |
| collection | DOAJ |
| description | Despite decades of research, the fundamental processes involved in the initiation and acceleration of solar eruptions remain not fully understood, making them long-standing and challenging problems in solar physics. Recent high-resolution observations by the Goode Solar Telescope have revealed small-scale magnetic flux emergence in localized regions of solar active areas prior to eruptions. Although much smaller in size than the entire active region, these emerging fluxes reached strengths of up to 2000 G. To investigate their impact, we performed data-constrained magnetohydrodynamic simulations. We find that while the small-scale emerging flux does not significantly alter the preeruption evolution, it dramatically accelerates the eruption during the main phase by enhancing the growth of torus instability, which emerges in the nonlinear stage. This enhancement occurs independently of the decay index profile. Our analysis indicates that even subtle differences in the preeruption evolution can strongly influence the subsequent dynamics, suggesting that small-scale emerging flux can play a critical role in accelerating solar eruptions. |
| format | Article |
| id | doaj-art-abe8d972a04e4398a5bbb8b80fa910d5 |
| institution | Kabale University |
| issn | 2041-8205 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal Letters |
| spelling | doaj-art-abe8d972a04e4398a5bbb8b80fa910d52025-08-20T03:25:05ZengIOP PublishingThe Astrophysical Journal Letters2041-82052025-01-019881L3610.3847/2041-8213/adeab2Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-scale Flux EmergenceSatoshi Inoue0https://orcid.org/0000-0001-5121-5122Takahiro Miyoshi1https://orcid.org/0000-0002-4675-4460Keiji Hayashi2https://orcid.org/0000-0001-9046-6688Huu Minh Triet Nguyen3Ju Jing4https://orcid.org/0000-0002-8179-3625Wenda Cao5https://orcid.org/0000-0003-2427-6047Haimin Wang6https://orcid.org/0000-0002-5233-565XCenter for Solar-Terrestrial Research, New Jersey Institute of Technology , Newark, NJ 07102-1982, USAGraduate School of Advanced Science and Engineering, Hiroshima University , Higashi-Hiroshima, 739-8526, JapanCenter for Solar-Terrestrial Research, New Jersey Institute of Technology , Newark, NJ 07102-1982, USACenter for Solar-Terrestrial Research, New Jersey Institute of Technology , Newark, NJ 07102-1982, USACenter for Solar-Terrestrial Research, New Jersey Institute of Technology , Newark, NJ 07102-1982, USACenter for Solar-Terrestrial Research, New Jersey Institute of Technology , Newark, NJ 07102-1982, USA; Big Bear Solar Observatory, New Jersey Institute of Technology , 40386 North Shore Lane, Big Bear City, CA 92314, USACenter for Solar-Terrestrial Research, New Jersey Institute of Technology , Newark, NJ 07102-1982, USADespite decades of research, the fundamental processes involved in the initiation and acceleration of solar eruptions remain not fully understood, making them long-standing and challenging problems in solar physics. Recent high-resolution observations by the Goode Solar Telescope have revealed small-scale magnetic flux emergence in localized regions of solar active areas prior to eruptions. Although much smaller in size than the entire active region, these emerging fluxes reached strengths of up to 2000 G. To investigate their impact, we performed data-constrained magnetohydrodynamic simulations. We find that while the small-scale emerging flux does not significantly alter the preeruption evolution, it dramatically accelerates the eruption during the main phase by enhancing the growth of torus instability, which emerges in the nonlinear stage. This enhancement occurs independently of the decay index profile. Our analysis indicates that even subtle differences in the preeruption evolution can strongly influence the subsequent dynamics, suggesting that small-scale emerging flux can play a critical role in accelerating solar eruptions.https://doi.org/10.3847/2041-8213/adeab2Solar flaresSolar active region magnetic fieldsMagnetohydrodynamicsMagnetohydrodynamical simulationsSolar coronal mass ejectionsActive solar corona |
| spellingShingle | Satoshi Inoue Takahiro Miyoshi Keiji Hayashi Huu Minh Triet Nguyen Ju Jing Wenda Cao Haimin Wang Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-scale Flux Emergence The Astrophysical Journal Letters Solar flares Solar active region magnetic fields Magnetohydrodynamics Magnetohydrodynamical simulations Solar coronal mass ejections Active solar corona |
| title | Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-scale Flux Emergence |
| title_full | Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-scale Flux Emergence |
| title_fullStr | Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-scale Flux Emergence |
| title_full_unstemmed | Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-scale Flux Emergence |
| title_short | Acceleration of Solar Eruptions via Enhanced Torus Instability Driven by Small-scale Flux Emergence |
| title_sort | acceleration of solar eruptions via enhanced torus instability driven by small scale flux emergence |
| topic | Solar flares Solar active region magnetic fields Magnetohydrodynamics Magnetohydrodynamical simulations Solar coronal mass ejections Active solar corona |
| url | https://doi.org/10.3847/2041-8213/adeab2 |
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