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dc.contributor.authorMackay, Duncan Hendry
dc.contributor.authorYeates, Anthony Robinson
dc.contributor.authorBocquet, Francois-Xavier
dc.identifier.citationMackay , D H , Yeates , A R & Bocquet , F-X 2016 , ' Impact of an L5 magnetograph on nonpotential solar global magnetic field modeling ' , Astrophysical Journal , vol. 825 , no. 2 , 131 , pp. 1-16 .
dc.identifier.otherPURE: 242609525
dc.identifier.otherPURE UUID: a53fff79-b9be-404c-ac56-482e5f3f8318
dc.identifier.otherScopus: 84978525653
dc.identifier.otherORCID: /0000-0001-6065-8531/work/58055443
dc.identifier.otherWOS: 000381940800049
dc.description.abstractWe present the first theoretical study to consider what improvement could be obtained in global nonpotential modeling of the solar corona if magnetograph data were available from the L5 Lagrange point, in addition to from the direction of Earth. To consider this, we first carry out a "reference Sun" simulation over two solar cycles. An important property of this simulation is that random bipole emergences are allowed across the entire solar surface at any given time (such as can occur on the Sun). Next we construct two "limited data" simulations, where bipoles are only included when they could be seen from (i) an Earth-based magnetograph and (ii) either Earth- or L5 based magnetographs. The improvement in reproducing the reference Sun simulation when an L5 view is available is quantified through considering global quantities in the limited data simulations. These include surface and polar flux, total magnetic energy, volume electric current, open flux and the number of flux ropes. Results show that when an L5 observational viewpoint is included, the accuracy of the global quantities in the limited data simulations can increase by 26-40%. This clearly shows that a magnetograph at the L5 point could significantly increase the accuracy of global nonpotential modeling and with this the accuracy of future space weather forecasts.
dc.relation.ispartofAstrophysical Journalen
dc.rights© 2016, The American Astronomical Society. This work is made available online in accordance with the publisher’s policies. This is the final published version of the work, which was originally published at
dc.subjectSun: activityen
dc.subjectSun: coronaen
dc.subjectSun: magnetic fieldsen
dc.subjectQA Mathematicsen
dc.subjectQB Astronomyen
dc.subjectQC Physicsen
dc.titleImpact of an L5 magnetograph on nonpotential solar global magnetic field modelingen
dc.typeJournal articleen
dc.contributor.sponsorThe Leverhulme Trusten
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.contributor.sponsorScience & Technology Facilities Councilen
dc.description.versionPublisher PDFen
dc.contributor.institutionUniversity of St Andrews. Applied Mathematicsen
dc.description.statusPeer revieweden
dc.identifier.grantnumberPO: 4070103637en

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