Hide metadata

dc.date.accessioned2024-03-25T17:31:30Z
dc.date.available2024-03-25T17:31:30Z
dc.date.created2024-02-22T13:23:23Z
dc.date.issued2024
dc.identifier.citationWang, Ya Fletcher, Lyndsay Mulay, Sargam Ji, Haisheng Cao, Wenda . Enhanced Three-minute Oscillation above a Sunspot during a Solar Flare. The Astrophysical Journal (ApJ). 2024, 961(2)
dc.identifier.urihttp://hdl.handle.net/10852/110119
dc.description.abstractAbstract Three-minute oscillations are a common phenomenon in the solar chromosphere above a sunspot. Oscillations can be affected by the energy release process related to solar flares. In this paper, we report on an enhanced oscillation in flare event SOL2012-07-05T21:42 with a period of around 3 minutes that occurred at the location of a flare ribbon at a sunspot umbral–penumbral boundary and was observed in both chromospheric and coronal passbands. An analysis of this oscillation was carried out using simultaneous ground-based observations from the Goode Solar Telescope at the Big Bear Solar Observatory and space-based observations from the Solar Dynamics Observatory. A frequency shift was observed before and after the flare, with the running penumbral wave that was present with a period of about 200 s before the flare coexisting with a strengthened oscillation with a period of 180 s at the same locations after the flare. We also found a phase difference between different passbands, with the oscillation occurring from high-temperature to low-temperature passbands. Theoretically, the change in frequency was strongly dependent on the variation of the inclination of the magnetic field and the chromospheric temperature. Following an analysis of the properties of the region, we found the frequency change was caused by a slight decrease of the magnetic inclination angle with respect to the local vertical. In addition, we suggest that the enhanced 3 minute oscillation was related to the additional heating, maybe due to the downflow, during the EUV late phase of the flare.
dc.languageEN
dc.rightsAttribution 4.0 International
dc.rights.urihttps://creativecommons.org/licenses/by/4.0/
dc.titleEnhanced Three-minute Oscillation above a Sunspot during a Solar Flare
dc.title.alternativeENEngelskEnglishEnhanced Three-minute Oscillation above a Sunspot during a Solar Flare
dc.typeJournal article
dc.creator.authorWang, Ya
dc.creator.authorFletcher, Lyndsay
dc.creator.authorMulay, Sargam
dc.creator.authorJi, Haisheng
dc.creator.authorCao, Wenda
cristin.unitcode185,15,3,40
cristin.unitnameRosseland senter for solfysikk
cristin.ispublishedtrue
cristin.fulltextoriginal
cristin.qualitycode2
dc.identifier.cristin2248830
dc.identifier.bibliographiccitationinfo:ofi/fmt:kev:mtx:ctx&ctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=The Astrophysical Journal (ApJ)&rft.volume=961&rft.spage=&rft.date=2024
dc.identifier.jtitleThe Astrophysical Journal (ApJ)
dc.identifier.volume961
dc.identifier.issue2
dc.identifier.pagecount14
dc.identifier.doihttps://doi.org/10.3847/1538-4357/ad10a9
dc.subject.nviVDP::Astrofysikk, astronomi: 438
dc.type.documentTidsskriftartikkel
dc.type.peerreviewedPeer reviewed
dc.source.issn0004-637X
dc.type.versionPublishedVersion
cristin.articleid231
dc.relation.projectNFR/262622


Files in this item

Appears in the following Collection

Hide metadata

Attribution 4.0 International
This item's license is: Attribution 4.0 International