Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1
We report the first detection of a magnetic discontinuity in the upper solar chromosphere associated with a coronal loop brightening. Our findings are based on novel observations obtained by the Chromospheric LAyer SpectroPolarimeter (CLASP2.1) suborbital space experiment. During its short 6 minute...
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2025-01-01
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| Online Access: | https://doi.org/10.3847/1538-4357/ad94f6 |
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| author | Donguk Song Ryohko Ishikawa David E. McKenzie Javier Trujillo Bueno Frédéric Auchère Ryouhei Kano Amy Winebarger Takenori J. Okamoto Laurel A. Rachmeler Ken Kobayashi Genevieve D. Vigil Adam R. Kobelski Christian Bethge Eun-Kyung Lim Luca Belluzzi Ernest Alsina Ballester Tanausú del Pino Alemán Jiří Štěpán |
| author_facet | Donguk Song Ryohko Ishikawa David E. McKenzie Javier Trujillo Bueno Frédéric Auchère Ryouhei Kano Amy Winebarger Takenori J. Okamoto Laurel A. Rachmeler Ken Kobayashi Genevieve D. Vigil Adam R. Kobelski Christian Bethge Eun-Kyung Lim Luca Belluzzi Ernest Alsina Ballester Tanausú del Pino Alemán Jiří Štěpán |
| author_sort | Donguk Song |
| collection | DOAJ |
| description | We report the first detection of a magnetic discontinuity in the upper solar chromosphere associated with a coronal loop brightening. Our findings are based on novel observations obtained by the Chromospheric LAyer SpectroPolarimeter (CLASP2.1) suborbital space experiment. During its short 6 minute flight, CLASP2.1 successfully obtained spectropolarimetric data across the Mg ii h and k lines, which allowed us to map the longitudinal magnetic field at multiple heights in the chromosphere of a solar active region. During our observation, we found a coronal loop brightening that was intermittently and recurrently heated. The temperature of the brightening plasma is above 2.5 MK, which is higher than the ambient temperature, and no corresponding brightening is detected in the images of the photosphere and lower chromosphere. The notable finding of our study is that the coronal loop brightening of interest is observed across a region where the magnetic field polarity changes abruptly in the upper chromosphere. Our results provide observational evidence that the heating mechanism of the coronal loop brightening is consistent with magnetic reconnection in the upper solar chromosphere. |
| format | Article |
| id | doaj-art-29de22db908040119c6310b1111ac622 |
| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj-art-29de22db908040119c6310b1111ac6222025-01-07T13:02:45ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01978214010.3847/1538-4357/ad94f6Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1Donguk Song0https://orcid.org/0000-0003-3034-8406Ryohko Ishikawa1https://orcid.org/0000-0001-8830-0769David E. McKenzie2https://orcid.org/0000-0002-9921-7757Javier Trujillo Bueno3https://orcid.org/0000-0001-5131-4139Frédéric Auchère4https://orcid.org/0000-0003-0972-7022Ryouhei Kano5https://orcid.org/0000-0002-2093-085XAmy Winebarger6https://orcid.org/0000-0002-5608-531XTakenori J. Okamoto7https://orcid.org/0000-0003-3765-1774Laurel A. Rachmeler8https://orcid.org/0000-0002-3770-009XKen Kobayashi9https://orcid.org/0000-0003-1057-7113Genevieve D. Vigil10https://orcid.org/0000-0002-7219-1526Adam R. Kobelski11https://orcid.org/0000-0002-4691-1729Christian Bethge12https://orcid.org/0000-0001-9076-6461Eun-Kyung Lim13https://orcid.org/0000-0002-7358-9827Luca Belluzzi14https://orcid.org/0000-0002-8775-0132Ernest Alsina Ballester15https://orcid.org/0000-0001-9095-9685Tanausú del Pino Alemán16https://orcid.org/0000-0003-1465-5692Jiří Štěpán17https://orcid.org/0000-0002-8292-2636Korea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea ; donguksong@kasi.re.kr; National Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanNational Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanNASA Marshall Space Flight Center , Huntsville, AL 35812, USAInstituto de Astrofísica de Canarias , E-38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna , E-38206 La Laguna, Tenerife, Spain; Consejo Superior de Investigaciones Científicas , SpainInstitut d’Astrophysique Spatiale , 91405 Orsay Cedex, FranceNational Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanNASA Marshall Space Flight Center , Huntsville, AL 35812, USANational Astronomical Observatory of Japan , 2-21-1 Osawa, Mitaka, Tokyo 181-8588, JapanNational Oceanic and Atmospheric Administration, National Centers for Environmental Information , Boulder, CO 80305, USANASA Marshall Space Flight Center , Huntsville, AL 35812, USANASA Marshall Space Flight Center , Huntsville, AL 35812, USANASA Marshall Space Flight Center , Huntsville, AL 35812, USACooperative Institute for Research in Environmental Sciences, University of Colorado Boulder , Boulder, CO 80305, USAKorea Astronomy and Space Science Institute , 776 Daedeok-daero, Yuseong-gu, Daejeon 34055, Republic of Korea ; donguksong@kasi.re.krIstituto Ricerche Solari Aldo e Cele Daccò (IRSOL), Faculty of Informatics, Università della Svizzera italiana (USI) , CH-6605 Locarno, Switzerland; Institute für Sonnenphysik (KIS) , D-79110, Freiburg i. Br., Germany; Euler Institute, Università della Svizzera italiana (USI) , CH-6900 Lugano, SwitzerlandInstituto de Astrofísica de Canarias , E-38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna , E-38206 La Laguna, Tenerife, SpainInstituto de Astrofísica de Canarias , E-38205 La Laguna, Tenerife, Spain; Departamento de Astrofísica, Universidad de La Laguna , E-38206 La Laguna, Tenerife, SpainAstronomical Institute, Academy of Sciences of the Czech Republic , 25165 Ondrejov, Czech RepublicWe report the first detection of a magnetic discontinuity in the upper solar chromosphere associated with a coronal loop brightening. Our findings are based on novel observations obtained by the Chromospheric LAyer SpectroPolarimeter (CLASP2.1) suborbital space experiment. During its short 6 minute flight, CLASP2.1 successfully obtained spectropolarimetric data across the Mg ii h and k lines, which allowed us to map the longitudinal magnetic field at multiple heights in the chromosphere of a solar active region. During our observation, we found a coronal loop brightening that was intermittently and recurrently heated. The temperature of the brightening plasma is above 2.5 MK, which is higher than the ambient temperature, and no corresponding brightening is detected in the images of the photosphere and lower chromosphere. The notable finding of our study is that the coronal loop brightening of interest is observed across a region where the magnetic field polarity changes abruptly in the upper chromosphere. Our results provide observational evidence that the heating mechanism of the coronal loop brightening is consistent with magnetic reconnection in the upper solar chromosphere.https://doi.org/10.3847/1538-4357/ad94f6Solar magnetic fieldsSolar magnetic reconnectionSolar coronal loopsSolar coronal heatingSolar chromosphere |
| spellingShingle | Donguk Song Ryohko Ishikawa David E. McKenzie Javier Trujillo Bueno Frédéric Auchère Ryouhei Kano Amy Winebarger Takenori J. Okamoto Laurel A. Rachmeler Ken Kobayashi Genevieve D. Vigil Adam R. Kobelski Christian Bethge Eun-Kyung Lim Luca Belluzzi Ernest Alsina Ballester Tanausú del Pino Alemán Jiří Štěpán Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1 The Astrophysical Journal Solar magnetic fields Solar magnetic reconnection Solar coronal loops Solar coronal heating Solar chromosphere |
| title | Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1 |
| title_full | Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1 |
| title_fullStr | Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1 |
| title_full_unstemmed | Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1 |
| title_short | Detection of a Magnetic Discontinuity in the Upper Solar Chromosphere Associated with a Coronal Loop Brightening Observed by CLASP2.1 |
| title_sort | detection of a magnetic discontinuity in the upper solar chromosphere associated with a coronal loop brightening observed by clasp2 1 |
| topic | Solar magnetic fields Solar magnetic reconnection Solar coronal loops Solar coronal heating Solar chromosphere |
| url | https://doi.org/10.3847/1538-4357/ad94f6 |
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