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Investigation of the Middle Corona with SWAP and a Data-Driven Non-Potential Coronal Magnetic Field Model
The large field-of-view of the Sun Watcher using Active Pixel System detector and Image Processing (SWAP) instrument onboard the PRoject for Onboard Autonomy 2 (PROBA2) spacecraft provides a unique opportunity to study extended coronal structures observed in the EUV in conjunction with global corona...
Autores principales: | , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Springer Netherlands
2020
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7405935/ https://www.ncbi.nlm.nih.gov/pubmed/32801397 http://dx.doi.org/10.1007/s11207-020-01668-2 |
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author | Meyer, Karen A. Mackay, Duncan H. Talpeanu, Dana-Camelia Upton, Lisa A. West, Matthew J. |
author_facet | Meyer, Karen A. Mackay, Duncan H. Talpeanu, Dana-Camelia Upton, Lisa A. West, Matthew J. |
author_sort | Meyer, Karen A. |
collection | PubMed |
description | The large field-of-view of the Sun Watcher using Active Pixel System detector and Image Processing (SWAP) instrument onboard the PRoject for Onboard Autonomy 2 (PROBA2) spacecraft provides a unique opportunity to study extended coronal structures observed in the EUV in conjunction with global coronal magnetic field simulations. A global non-potential magnetic field model is used to simulate the evolution of the global corona from 1 September 2014 to 31 March 2015, driven by newly emerging bipolar active regions determined from Helioseismic and Magnetic Imager (HMI) magnetograms. We compare the large-scale structure of the simulated magnetic field with structures seen off-limb in SWAP EUV observations. In particular, we investigate how successful the model is in reproducing regions of closed and open structures, the scale of structures, and compare the evolution of a coronal fan observed over several rotations. The model is found to accurately reproduce observed large-scale, off-limb structures. When discrepancies do arise they mainly occur off the east solar limb due to active regions emerging on the far side of the Sun, which cannot be incorporated into the model until they are observed on the Earth-facing side. When such “late” active region emergences are incorporated into the model, we find that the simulated corona self-corrects within a few days, so that simulated structures off the west limb more closely match what is observed. Where the model is less successful, we consider how this may be addressed, through model developments or additional observational products. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s11207-020-01668-2) contains supplementary material, which is available to authorized users. |
format | Online Article Text |
id | pubmed-7405935 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2020 |
publisher | Springer Netherlands |
record_format | MEDLINE/PubMed |
spelling | pubmed-74059352020-08-13 Investigation of the Middle Corona with SWAP and a Data-Driven Non-Potential Coronal Magnetic Field Model Meyer, Karen A. Mackay, Duncan H. Talpeanu, Dana-Camelia Upton, Lisa A. West, Matthew J. Sol Phys Article The large field-of-view of the Sun Watcher using Active Pixel System detector and Image Processing (SWAP) instrument onboard the PRoject for Onboard Autonomy 2 (PROBA2) spacecraft provides a unique opportunity to study extended coronal structures observed in the EUV in conjunction with global coronal magnetic field simulations. A global non-potential magnetic field model is used to simulate the evolution of the global corona from 1 September 2014 to 31 March 2015, driven by newly emerging bipolar active regions determined from Helioseismic and Magnetic Imager (HMI) magnetograms. We compare the large-scale structure of the simulated magnetic field with structures seen off-limb in SWAP EUV observations. In particular, we investigate how successful the model is in reproducing regions of closed and open structures, the scale of structures, and compare the evolution of a coronal fan observed over several rotations. The model is found to accurately reproduce observed large-scale, off-limb structures. When discrepancies do arise they mainly occur off the east solar limb due to active regions emerging on the far side of the Sun, which cannot be incorporated into the model until they are observed on the Earth-facing side. When such “late” active region emergences are incorporated into the model, we find that the simulated corona self-corrects within a few days, so that simulated structures off the west limb more closely match what is observed. Where the model is less successful, we consider how this may be addressed, through model developments or additional observational products. ELECTRONIC SUPPLEMENTARY MATERIAL: The online version of this article (10.1007/s11207-020-01668-2) contains supplementary material, which is available to authorized users. Springer Netherlands 2020-07-27 2020 /pmc/articles/PMC7405935/ /pubmed/32801397 http://dx.doi.org/10.1007/s11207-020-01668-2 Text en © The Author(s) 2020 Open Access This article is licensed under a Creative Commons Attribution 4.0 International License, which permits use, sharing, adaptation, distribution and reproduction in any medium or format, as long as you give appropriate credit to the original author(s) and the source, provide a link to the Creative Commons licence, and indicate if changes were made. The images or other third party material in this article are included in the article’s Creative Commons licence, unless indicated otherwise in a credit line to the material. If material is not included in the article’s Creative Commons licence and your intended use is not permitted by statutory regulation or exceeds the permitted use, you will need to obtain permission directly from the copyright holder. To view a copy of this licence, visit http://creativecommons.org/licenses/by/4.0/. |
spellingShingle | Article Meyer, Karen A. Mackay, Duncan H. Talpeanu, Dana-Camelia Upton, Lisa A. West, Matthew J. Investigation of the Middle Corona with SWAP and a Data-Driven Non-Potential Coronal Magnetic Field Model |
title | Investigation of the Middle Corona with SWAP and a Data-Driven Non-Potential Coronal Magnetic Field Model |
title_full | Investigation of the Middle Corona with SWAP and a Data-Driven Non-Potential Coronal Magnetic Field Model |
title_fullStr | Investigation of the Middle Corona with SWAP and a Data-Driven Non-Potential Coronal Magnetic Field Model |
title_full_unstemmed | Investigation of the Middle Corona with SWAP and a Data-Driven Non-Potential Coronal Magnetic Field Model |
title_short | Investigation of the Middle Corona with SWAP and a Data-Driven Non-Potential Coronal Magnetic Field Model |
title_sort | investigation of the middle corona with swap and a data-driven non-potential coronal magnetic field model |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7405935/ https://www.ncbi.nlm.nih.gov/pubmed/32801397 http://dx.doi.org/10.1007/s11207-020-01668-2 |
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