The Role of Sunspots Magnetic Configuration in the Formation of Umbral Fine-Structures
We use spectro-polarimetric data recorded by Hinode to analyze the magnetic field configuration of a part of a sunspot (AR10923) where a bundle of penumbral filaments are intruding into its umbra. We want to explore the role of the sunspot magnetic configuration in the formation and kinematics of th...
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Damghan university
2023-10-01
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| Series: | Iranian Journal of Astronomy and Astrophysics |
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| Online Access: | https://ijaa.du.ac.ir/article_351_d5e3b369c29da2399dc8187446e379ba.pdf |
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| author | Hashem Hamedivafa |
| author_facet | Hashem Hamedivafa |
| author_sort | Hashem Hamedivafa |
| collection | DOAJ |
| description | We use spectro-polarimetric data recorded by Hinode to analyze the magnetic field configuration of a part of a sunspot (AR10923) where a bundle of penumbral filaments are intruding into its umbra. We want to explore the role of the sunspot magnetic configuration in the formation and kinematics of the fine-structures, such as umbral dots and light bridges, inside the sunspot umbra. Both direct inferences from polarization Stokes profiles and the inversion results using the SIR code imply a well-arranged magnetic field configuration in the umbra where moving umbral dots are easily formed at the leading edges of the rapidly intruding penumbral filaments. We suggest that the magnetic field topology is rearranged via magnetic reconnection process by which a part of the magnetic energy is converted into thermal and kinetic energy, leading to the orderly aligned magnetic field lines. This new configuration causes the umbral fine-structures to form easily and more frequent. |
| format | Article |
| id | doaj-art-f0c55aaf69e0434b948947c2c10c51cb |
| institution | Kabale University |
| issn | 2322-4924 2383-403X |
| language | English |
| publishDate | 2023-10-01 |
| publisher | Damghan university |
| record_format | Article |
| series | Iranian Journal of Astronomy and Astrophysics |
| spelling | doaj-art-f0c55aaf69e0434b948947c2c10c51cb2025-01-12T10:13:06ZengDamghan universityIranian Journal of Astronomy and Astrophysics2322-49242383-403X2023-10-0110111112110.22128/ijaa.2023.717.1161351The Role of Sunspots Magnetic Configuration in the Formation of Umbral Fine-StructuresHashem Hamedivafa0Physics Department, Faculty of Science, Imam Khomeini International UniversityWe use spectro-polarimetric data recorded by Hinode to analyze the magnetic field configuration of a part of a sunspot (AR10923) where a bundle of penumbral filaments are intruding into its umbra. We want to explore the role of the sunspot magnetic configuration in the formation and kinematics of the fine-structures, such as umbral dots and light bridges, inside the sunspot umbra. Both direct inferences from polarization Stokes profiles and the inversion results using the SIR code imply a well-arranged magnetic field configuration in the umbra where moving umbral dots are easily formed at the leading edges of the rapidly intruding penumbral filaments. We suggest that the magnetic field topology is rearranged via magnetic reconnection process by which a part of the magnetic energy is converted into thermal and kinetic energy, leading to the orderly aligned magnetic field lines. This new configuration causes the umbral fine-structures to form easily and more frequent.https://ijaa.du.ac.ir/article_351_d5e3b369c29da2399dc8187446e379ba.pdfsun: sunspotfine-structuresmagnetic structure |
| spellingShingle | Hashem Hamedivafa The Role of Sunspots Magnetic Configuration in the Formation of Umbral Fine-Structures Iranian Journal of Astronomy and Astrophysics sun: sunspot fine-structures magnetic structure |
| title | The Role of Sunspots Magnetic Configuration in the Formation of Umbral Fine-Structures |
| title_full | The Role of Sunspots Magnetic Configuration in the Formation of Umbral Fine-Structures |
| title_fullStr | The Role of Sunspots Magnetic Configuration in the Formation of Umbral Fine-Structures |
| title_full_unstemmed | The Role of Sunspots Magnetic Configuration in the Formation of Umbral Fine-Structures |
| title_short | The Role of Sunspots Magnetic Configuration in the Formation of Umbral Fine-Structures |
| title_sort | role of sunspots magnetic configuration in the formation of umbral fine structures |
| topic | sun: sunspot fine-structures magnetic structure |
| url | https://ijaa.du.ac.ir/article_351_d5e3b369c29da2399dc8187446e379ba.pdf |
| work_keys_str_mv | AT hashemhamedivafa theroleofsunspotsmagneticconfigurationintheformationofumbralfinestructures AT hashemhamedivafa roleofsunspotsmagneticconfigurationintheformationofumbralfinestructures |