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dc.contributor.author
Mulay, Sargam M.
dc.contributor.author
Sharma, Rohit
dc.contributor.author
Valori, Gherardo
dc.contributor.author
Vasquez, Alberto Marcos
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dc.contributor.author
Del Zanna, Giulio
dc.contributor.author
Mason, Helen
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Oberoi, Divya
dc.date.available
2022-12-19T18:09:31Z
dc.date.issued
2019-12
dc.identifier.citation
Mulay, Sargam M.; Sharma, Rohit; Valori, Gherardo; Vasquez, Alberto Marcos; Del Zanna, Giulio; et al.; Study of the spatial association between an active region jet and a nonthermal type III radio burst; EDP Sciences; Astronomy and Astrophysics; 632; A108; 12-2019; 108-119
dc.identifier.issn
0004-6361
dc.identifier.uri
http://hdl.handle.net/11336/181804
dc.description.abstract
Aims. We aim to investigate the spatial location of the source of an active region (AR) jet and its relation with associated nonthermal type III radio emission. Methods. An emission measure (EM) method was used to study the thermodynamic nature of the AR jet. The nonthermal type III radio burst observed at meterwavelength was studied using the Murchison Widefield Array (MWA) radio imaging and spectroscopic data. The local configuration of the magnetic field and the connectivity of the source region of the jet with open magnetic field structures was studied using a nonlinear force-free field (NLFFF) extrapolation and potential field source surface (PFSS) extrapolation respectively. Results. The plane-of-sky velocity of the AR jet was found to be ∼136 km s-1. The EM analysis confirmed the presence of low temperature 2 MK plasma for the spire, whereas hot plasma, between 5 and 8 MK, was present at the footpoint region which also showed the presence of Fe XVIII emission. A lower limit on the electron number density was found to be 1.4 × 108 cm-3 for the spire and 2.2 × 108 cm-3 for the footpoint. A temporal and spatial correlation between the AR jet and nonthermal type III burst confirmed the presence of open magnetic fields. An NLFFF extrapolation showed that the photospheric footpoints of the null point were anchored at the location of the source brightening of the jet. The spatial location of the radio sources suggests an association with the extrapolated closed and open magnetic fields although strong propagation effects are also present. Conclusions. The multi-scale analysis of the field at local, AR, and solar scales confirms the interlink between different flux bundles involved in the generation of the type III radio signal with flux transferred from a small coronal hole to the periphery of the sunspot via null point reconnection with an emerging structure.
dc.format
application/pdf
dc.language.iso
eng
dc.publisher
EDP Sciences
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dc.rights
info:eu-repo/semantics/restrictedAccess
dc.rights.uri
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
dc.subject
SUN: ACTIVITY
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SUN: ATMOSPHERE
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SUN: CORONA
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SUN: MAGNETIC FIELDS
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SUN: RADIO RADIATION
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SUN: UV RADIATION
dc.subject.classification
Astronomía
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dc.subject.classification
Ciencias Físicas
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dc.subject.classification
CIENCIAS NATURALES Y EXACTAS
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dc.title
Study of the spatial association between an active region jet and a nonthermal type III radio burst
dc.type
info:eu-repo/semantics/article
dc.type
info:ar-repo/semantics/artículo
dc.type
info:eu-repo/semantics/publishedVersion
dc.date.updated
2020-11-18T17:30:21Z
dc.identifier.eissn
1432-0746
dc.journal.volume
632
dc.journal.number
A108
dc.journal.pagination
108-119
dc.journal.pais
Francia
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dc.journal.ciudad
Paris
dc.description.fil
Fil: Mulay, Sargam M.. University Of Cambridge. Fluid Dynamics Laboratory. Dep.of App.mathematics And Theoretical Physics; Reino Unido. Inter-University Centre for Astronomy and Astrophysics; India
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Fil: Sharma, Rohit. University Of Applied Sciences Northwestern Switzerland.; Suiza
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Fil: Valori, Gherardo. University College London; Estados Unidos
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Fil: Vasquez, Alberto Marcos. Consejo Nacional de Investigaciónes Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Astronomía y Física del Espacio. - Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Astronomía y Física del Espacio; Argentina
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Fil: Del Zanna, Giulio. University Of Cambridge. Fluid Dynamics Laboratory. Dep.of App.mathematics And Theoretical Physics. Center For Mathematical Sciences; Reino Unido
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Fil: Mason, Helen. University Of Cambridge. Fluid Dynamics Laboratory. Dep.of App.mathematics And Theoretical Physics. Center For Mathematical Sciences; Reino Unido
dc.description.fil
Fil: Oberoi, Divya. National Centre for Radio Astrophysics; India
dc.journal.title
Astronomy and Astrophysics
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dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/url/https://www.aanda.org/articles/aa/abs/2019/12/aa36369-19/aa36369-19.html
dc.relation.alternativeid
info:eu-repo/semantics/altIdentifier/doi/https://doi.org/10.1051/0004-6361/201936369
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