First Analysis of In Situ Observation of Surface Alfvén Waves in an ICME Flux Rope
Alfvén waves (AWs) are ubiquitous in space and astrophysical plasma. Their crucial role in various physical processes has triggered intense research in solar–terrestrial physics. Simulation studies have proposed the generation of AWs along the surface of a cylindrical flux rope, referred to as surfa...
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| Format: | Article |
| Language: | English |
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IOP Publishing
2023-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/acb93c |
| _version_ | 1797697207368941568 |
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| author | Anil Raghav Omkar Dhamane Zubair Shaikh Naba Azmi Ankita Manjrekar Utsav Panchal Kalpesh Ghag Daniele Telloni Raffaella D’Amicis Prathmesh Tari Akshata Gurav |
| author_facet | Anil Raghav Omkar Dhamane Zubair Shaikh Naba Azmi Ankita Manjrekar Utsav Panchal Kalpesh Ghag Daniele Telloni Raffaella D’Amicis Prathmesh Tari Akshata Gurav |
| author_sort | Anil Raghav |
| collection | DOAJ |
| description | Alfvén waves (AWs) are ubiquitous in space and astrophysical plasma. Their crucial role in various physical processes has triggered intense research in solar–terrestrial physics. Simulation studies have proposed the generation of AWs along the surface of a cylindrical flux rope, referred to as surface AWs (SAWs); however, the observational verification of this distinct wave has been elusive to date. We report the first in situ observation of SAWs in a flux rope of an interplanetary coronal mass ejection. We apply the Walén test to identify them. We have used Elsässer variables to estimate the characteristics of SAWs. They may be excited by the movement of the flux rope’s footpoints or by instabilities along the boundaries of the plasma magnetic cloud. Here, the change in plasma density or field strength in the surface-aligned magnetic field may trigger SAWs. |
| first_indexed | 2024-03-12T03:36:58Z |
| format | Article |
| id | doaj.art-ac7e026f81b940daa4bf5d1aee6d367f |
| institution | Directory Open Access Journal |
| issn | 1538-4357 |
| language | English |
| last_indexed | 2024-03-12T03:36:58Z |
| publishDate | 2023-01-01 |
| publisher | IOP Publishing |
| record_format | Article |
| series | The Astrophysical Journal |
| spelling | doaj.art-ac7e026f81b940daa4bf5d1aee6d367f2023-09-03T13:08:55ZengIOP PublishingThe Astrophysical Journal1538-43572023-01-0194516410.3847/1538-4357/acb93cFirst Analysis of In Situ Observation of Surface Alfvén Waves in an ICME Flux RopeAnil Raghav0https://orcid.org/0000-0002-4704-6706Omkar Dhamane1https://orcid.org/0000-0002-4862-4141Zubair Shaikh2https://orcid.org/0000-0002-9206-6327Naba Azmi3Ankita Manjrekar4Utsav Panchal5Kalpesh Ghag6https://orcid.org/0000-0002-9506-6875Daniele Telloni7https://orcid.org/0000-0002-6710-8142Raffaella D’Amicis8https://orcid.org/0000-0003-2647-117XPrathmesh Tari9Akshata Gurav10Department of Physics, University of Mumbai , Mumbai, India ; raghavanil1984@gmail.comDepartment of Physics, University of Mumbai , Mumbai, India ; raghavanil1984@gmail.comIndian Institute of Geomagnetism , Panvel, Navi Mumbai, IndiaDepartment of Physics, University of Mumbai , Mumbai, India ; raghavanil1984@gmail.comDepartment of Physics, University of Mumbai , Mumbai, India ; raghavanil1984@gmail.com; Indian Institute of Geomagnetism , Panvel, Navi Mumbai, IndiaDepartment of Physics, University of Mumbai , Mumbai, India ; raghavanil1984@gmail.comDepartment of Physics, University of Mumbai , Mumbai, India ; raghavanil1984@gmail.comNational Institute for Astrophysics , Astrophysical Observatory of Torino, Via Osservatorio 20, I-10025 Pino Torinese, Italy ; daniele.telloni@inaf.itNational Institute for Astrophysics, Institute for Space Astrophysics and Planetology , Via del Fosso del Cavaliere 100, I-00133 Roma, ItalyDepartment of Physics, University of Mumbai , Mumbai, India ; raghavanil1984@gmail.comDepartment of Physics, University of Mumbai , Mumbai, India ; raghavanil1984@gmail.comAlfvén waves (AWs) are ubiquitous in space and astrophysical plasma. Their crucial role in various physical processes has triggered intense research in solar–terrestrial physics. Simulation studies have proposed the generation of AWs along the surface of a cylindrical flux rope, referred to as surface AWs (SAWs); however, the observational verification of this distinct wave has been elusive to date. We report the first in situ observation of SAWs in a flux rope of an interplanetary coronal mass ejection. We apply the Walén test to identify them. We have used Elsässer variables to estimate the characteristics of SAWs. They may be excited by the movement of the flux rope’s footpoints or by instabilities along the boundaries of the plasma magnetic cloud. Here, the change in plasma density or field strength in the surface-aligned magnetic field may trigger SAWs.https://doi.org/10.3847/1538-4357/acb93cAlfven wavesSpace plasmasSolar coronal mass ejections |
| spellingShingle | Anil Raghav Omkar Dhamane Zubair Shaikh Naba Azmi Ankita Manjrekar Utsav Panchal Kalpesh Ghag Daniele Telloni Raffaella D’Amicis Prathmesh Tari Akshata Gurav First Analysis of In Situ Observation of Surface Alfvén Waves in an ICME Flux Rope The Astrophysical Journal Alfven waves Space plasmas Solar coronal mass ejections |
| title | First Analysis of In Situ Observation of Surface Alfvén Waves in an ICME Flux Rope |
| title_full | First Analysis of In Situ Observation of Surface Alfvén Waves in an ICME Flux Rope |
| title_fullStr | First Analysis of In Situ Observation of Surface Alfvén Waves in an ICME Flux Rope |
| title_full_unstemmed | First Analysis of In Situ Observation of Surface Alfvén Waves in an ICME Flux Rope |
| title_short | First Analysis of In Situ Observation of Surface Alfvén Waves in an ICME Flux Rope |
| title_sort | first analysis of in situ observation of surface alfven waves in an icme flux rope |
| topic | Alfven waves Space plasmas Solar coronal mass ejections |
| url | https://doi.org/10.3847/1538-4357/acb93c |
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