Please use this identifier to cite or link to this item: http://hdl.handle.net/2248/6976
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dc.contributor.authorKorsos, M. B-
dc.contributor.authorChatterjee, Piyali-
dc.contributor.authorErdelyi, R-
dc.date.accessioned2020-11-12T15:18:09Z-
dc.date.available2020-11-12T15:18:09Z-
dc.date.issued2018-04-20-
dc.identifier.citationThe Astrophysical Journal, Vol.857, No. 2, 103, pp. 1-12en_US
dc.identifier.issn0004-637X-
dc.identifier.urihttp://prints.iiap.res.in/handle/2248/6976-
dc.descriptionRestricted Access © The American Astronomical Society https://doi.org/10.3847/1538-4357/aab891en_US
dc.description.abstractHere, we test the weighted horizontal magnetic gradient (WGM) as a flare precursor, introduced by Korsós et al., by applying it to a magnetohydrodynamic (MHD) simulation of solar-like flares. The preflare evolution of the WGM and the behavior of the distance parameter between the area-weighted barycenters of opposite-polarity sunspots at various heights is investigated in the simulated δ-type sunspot. Four flares emanated from this sunspot. We found the optimum heights above the photosphere where the flare precursors of the WGM method are identifiable prior to each flare. These optimum heights agree reasonably well with the heights of the occurrence of flares identified from the analysis of their thermal and ohmic heating signatures in the simulation. We also estimated the expected time of the flare onsets from the duration of the approaching–receding motion of the barycenters of opposite polarities before each single flare. The estimated onset time and the actual time of occurrence of each flare are in good agreement at the corresponding optimum heights. This numerical experiment further supports the use of flare precursors based on the WGM method.en_US
dc.language.isoenen_US
dc.publisherIOP Publishingen_US
dc.subjectSun: evolutionen_US
dc.subjectSun: flaresen_US
dc.subjectsunspotsen_US
dc.titleApplying the weighted horizontal magnetic gradient method to a simulated flaring active regionen_US
dc.typeArticleen_US
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