Topological changes of the photospheric magnetic field inside active regions: a prelude to flares

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dc.creatorSorriso-Valvo, L.
dc.creatorCarbone, V.
dc.creatorAbramenko, V.
dc.creatorYurchyshyn, V.
dc.creatorNoullez, A.
dc.creatorPolitano, H.
dc.creatorPouquet, A.
dc.creatorVeltri, P.
dc.date2002-07-11
dc.date.accessioned2026-07-07T02:04:16Z
dc.date.available2026-07-07T02:04:16Z
dc.descriptionThe observations of magnetic field variations as a signature of flaring activity is one of the main goal in solar physics. Some efforts in the past give apparently no unambiguous observations of changes. We observed that the scaling laws of the current helicity inside a given flaring active region change clearly and abruptly in correspondence with the eruption of big flares at the top of that active region. Comparison with numerical simulations of MHD equations, indicates that the change of scaling behavior in the current helicity, seems to be associated to a topological reorganization of the footpoint of the magnetic field loop, namely to dissipation of small scales structures in turbulence. It is evident that the possibility of forecasting in real time high energy flares, even if partially, has a wide practical interest to prevent the effects of big flares on Earth and its environment.
dc.description23 pages, submitted to Planetary and Space Science (Jul 2002)
dc.identifierhttps://arxiv.org/abs/astro-ph/0207244
dc.identifierhttp://arxiv.org/abs/astro-ph/0207244
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/4687
dc.subjectAstrophysics
dc.subjectChaotic Dynamics
dc.subjectSpace Physics
dc.titleTopological changes of the photospheric magnetic field inside active regions: a prelude to flares
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