Matches in SemOpenAlex for { <https://semopenalex.org/work/W2144250641> ?p ?o ?g. }
- W2144250641 endingPage "513" @default.
- W2144250641 startingPage "501" @default.
- W2144250641 abstract "The magnetic field in the solar photosphere frequently carries strong electric currents, even though the global coronal configuration often resembles a potential field ringed by the heliospheric current sheet. To understand this, we compare TRACE EUV images of active-region coronae and potential-field source-surface extrapolations based on SOHO MDI magnetograms for 95 active regions. We conclude that significant nonpotentiality of the overall active-region coronal field occurs (1) when new flux has emerged within or very near a region within the last ~30 hr, resulting in complex polarity separation lines, or (2) when rapidly evolving, opposite-polarity concentrations are in contact at 4'' resolution. If these criteria are met by more than 15% of the region's flux, they correctly identify the (non) potentiality of active-region coronae in 88% of the cases. Flares are found to occur 2.4 times more frequently in active regions with nonpotential coronae than in near-potential regions, while their average X-ray peak flare brightness is 3.3 times higher. We suggest that the currents associated with coronal nonpotentiality have a characteristic growth and decay timescale of ~10-30 hr. We find that shear flows drive enhanced flaring or coronal nonpotentiality only if associated with complex and dynamic flux emergence within the above timescale. We discuss the implications of this finding for the modeling of the coronal-heliospheric coupling." @default.
- W2144250641 created "2016-06-24" @default.
- W2144250641 creator A5012204706 @default.
- W2144250641 creator A5027579436 @default.
- W2144250641 creator A5061996654 @default.
- W2144250641 creator A5080859046 @default.
- W2144250641 date "2005-07-20" @default.
- W2144250641 modified "2023-09-25" @default.
- W2144250641 title "The Nonpotentiality of Active‐Region Coronae and the Dynamics of the Photospheric Magnetic Field" @default.
- W2144250641 cites W1679898113 @default.
- W2144250641 cites W1971172452 @default.
- W2144250641 cites W1975186314 @default.
- W2144250641 cites W1978231887 @default.
- W2144250641 cites W1983505321 @default.
- W2144250641 cites W1988508465 @default.
- W2144250641 cites W1997076712 @default.
- W2144250641 cites W2005354871 @default.
- W2144250641 cites W2015545843 @default.
- W2144250641 cites W2039549426 @default.
- W2144250641 cites W2043267011 @default.
- W2144250641 cites W2049805135 @default.
- W2144250641 cites W2050829210 @default.
- W2144250641 cites W2063833181 @default.
- W2144250641 cites W2071154966 @default.
- W2144250641 cites W2085108230 @default.
- W2144250641 cites W2101141747 @default.
- W2144250641 cites W2106202136 @default.
- W2144250641 cites W2129958108 @default.
- W2144250641 cites W2136854902 @default.
- W2144250641 cites W2141718525 @default.
- W2144250641 cites W2149356501 @default.
- W2144250641 cites W3177773949 @default.
- W2144250641 doi "https://doi.org/10.1086/430733" @default.
- W2144250641 hasPublicationYear "2005" @default.
- W2144250641 type Work @default.
- W2144250641 sameAs 2144250641 @default.
- W2144250641 citedByCount "139" @default.
- W2144250641 countsByYear W21442506412012 @default.
- W2144250641 countsByYear W21442506412013 @default.
- W2144250641 countsByYear W21442506412014 @default.
- W2144250641 countsByYear W21442506412015 @default.
- W2144250641 countsByYear W21442506412016 @default.
- W2144250641 countsByYear W21442506412017 @default.
- W2144250641 countsByYear W21442506412018 @default.
- W2144250641 countsByYear W21442506412019 @default.
- W2144250641 countsByYear W21442506412020 @default.
- W2144250641 countsByYear W21442506412021 @default.
- W2144250641 countsByYear W21442506412022 @default.
- W2144250641 countsByYear W21442506412023 @default.
- W2144250641 crossrefType "journal-article" @default.
- W2144250641 hasAuthorship W2144250641A5012204706 @default.
- W2144250641 hasAuthorship W2144250641A5027579436 @default.
- W2144250641 hasAuthorship W2144250641A5061996654 @default.
- W2144250641 hasAuthorship W2144250641A5080859046 @default.
- W2144250641 hasBestOaLocation W21442506411 @default.
- W2144250641 hasConcept C108411613 @default.
- W2144250641 hasConcept C108884401 @default.
- W2144250641 hasConcept C115260700 @default.
- W2144250641 hasConcept C121332964 @default.
- W2144250641 hasConcept C1276947 @default.
- W2144250641 hasConcept C1491633281 @default.
- W2144250641 hasConcept C157479481 @default.
- W2144250641 hasConcept C172600038 @default.
- W2144250641 hasConcept C191897082 @default.
- W2144250641 hasConcept C192562407 @default.
- W2144250641 hasConcept C197370839 @default.
- W2144250641 hasConcept C205995761 @default.
- W2144250641 hasConcept C26218039 @default.
- W2144250641 hasConcept C2776779350 @default.
- W2144250641 hasConcept C2777361361 @default.
- W2144250641 hasConcept C2779588948 @default.
- W2144250641 hasConcept C2779900269 @default.
- W2144250641 hasConcept C44870925 @default.
- W2144250641 hasConcept C4839761 @default.
- W2144250641 hasConcept C54355233 @default.
- W2144250641 hasConcept C62520636 @default.
- W2144250641 hasConcept C64162976 @default.
- W2144250641 hasConcept C68709404 @default.
- W2144250641 hasConcept C72886185 @default.
- W2144250641 hasConcept C86803240 @default.
- W2144250641 hasConcept C87355193 @default.
- W2144250641 hasConceptScore W2144250641C108411613 @default.
- W2144250641 hasConceptScore W2144250641C108884401 @default.
- W2144250641 hasConceptScore W2144250641C115260700 @default.
- W2144250641 hasConceptScore W2144250641C121332964 @default.
- W2144250641 hasConceptScore W2144250641C1276947 @default.
- W2144250641 hasConceptScore W2144250641C1491633281 @default.
- W2144250641 hasConceptScore W2144250641C157479481 @default.
- W2144250641 hasConceptScore W2144250641C172600038 @default.
- W2144250641 hasConceptScore W2144250641C191897082 @default.
- W2144250641 hasConceptScore W2144250641C192562407 @default.
- W2144250641 hasConceptScore W2144250641C197370839 @default.
- W2144250641 hasConceptScore W2144250641C205995761 @default.
- W2144250641 hasConceptScore W2144250641C26218039 @default.
- W2144250641 hasConceptScore W2144250641C2776779350 @default.
- W2144250641 hasConceptScore W2144250641C2777361361 @default.
- W2144250641 hasConceptScore W2144250641C2779588948 @default.
- W2144250641 hasConceptScore W2144250641C2779900269 @default.