Filamentary Electron-beam Heating in Solar Flares
Radiation-hydrodynamic simulations of the solar-flare chromospheric emission very often lead to an excess of the line intensities when compared to observations. Various studies suggest that the flare loops have a certain intrinsic, multithread internal structure, which is still not resolved by curre...
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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/adc393 |
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| author | Michalina Litwicka Petr Heinzel Jana Kašparová |
| author_facet | Michalina Litwicka Petr Heinzel Jana Kašparová |
| author_sort | Michalina Litwicka |
| collection | DOAJ |
| description | Radiation-hydrodynamic simulations of the solar-flare chromospheric emission very often lead to an excess of the line intensities when compared to observations. Various studies suggest that the flare loops have a certain intrinsic, multithread internal structure, which is still not resolved by current telescopes. Taking this into account, we want to test and compare two different approaches for flare simulations. The first approach is the commonly used one, based on a continuous flux of nonthermal electrons heating the chromosphere for a rather long time. In the second approach, we consider the heating by short beam pulses consecutively within spatially unresolved filaments. Superposition of these short-duration pulses gives us the same electron-beam flux as in the first approach, but we are showing that the filamentary heating generates lower intensities in both the H α and Mg ii k lines, as expected. |
| format | Article |
| id | doaj-art-5d24a6a1ef7c4f17a42f971f06f6fed0 |
| institution | OA Journals |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-5d24a6a1ef7c4f17a42f971f06f6fed02025-08-20T02:17:28ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01983215510.3847/1538-4357/adc393Filamentary Electron-beam Heating in Solar FlaresMichalina Litwicka0https://orcid.org/0000-0001-5843-7473Petr Heinzel1https://orcid.org/0000-0002-5778-2600Jana Kašparová2https://orcid.org/0000-0001-9559-4136Center of Scientific Excellence—Solar and Stellar Activity, University of Wrocław , Joliot-Curie 12, 50-383 Wrocław, PolandCenter of Scientific Excellence—Solar and Stellar Activity, University of Wrocław , Joliot-Curie 12, 50-383 Wrocław, Poland; Astronomical Institute of the Czech Academy of Sciences , Fričova 298, 251 65 Ondřejov, Czech RepublicAstronomical Institute of the Czech Academy of Sciences , Fričova 298, 251 65 Ondřejov, Czech RepublicRadiation-hydrodynamic simulations of the solar-flare chromospheric emission very often lead to an excess of the line intensities when compared to observations. Various studies suggest that the flare loops have a certain intrinsic, multithread internal structure, which is still not resolved by current telescopes. Taking this into account, we want to test and compare two different approaches for flare simulations. The first approach is the commonly used one, based on a continuous flux of nonthermal electrons heating the chromosphere for a rather long time. In the second approach, we consider the heating by short beam pulses consecutively within spatially unresolved filaments. Superposition of these short-duration pulses gives us the same electron-beam flux as in the first approach, but we are showing that the filamentary heating generates lower intensities in both the H α and Mg ii k lines, as expected.https://doi.org/10.3847/1538-4357/adc393Solar chromosphereSolar flaresRadiative transfer simulationsHydrodynamical simulations |
| spellingShingle | Michalina Litwicka Petr Heinzel Jana Kašparová Filamentary Electron-beam Heating in Solar Flares The Astrophysical Journal Solar chromosphere Solar flares Radiative transfer simulations Hydrodynamical simulations |
| title | Filamentary Electron-beam Heating in Solar Flares |
| title_full | Filamentary Electron-beam Heating in Solar Flares |
| title_fullStr | Filamentary Electron-beam Heating in Solar Flares |
| title_full_unstemmed | Filamentary Electron-beam Heating in Solar Flares |
| title_short | Filamentary Electron-beam Heating in Solar Flares |
| title_sort | filamentary electron beam heating in solar flares |
| topic | Solar chromosphere Solar flares Radiative transfer simulations Hydrodynamical simulations |
| url | https://doi.org/10.3847/1538-4357/adc393 |
| work_keys_str_mv | AT michalinalitwicka filamentaryelectronbeamheatinginsolarflares AT petrheinzel filamentaryelectronbeamheatinginsolarflares AT janakasparova filamentaryelectronbeamheatinginsolarflares |