HR: 1340h
AN: SH13A-1094    [Abstracts]
TI: Correlation of multi-resolution analyses of active region magnetic field structure with flare activity
AU: * Ireland, J
EM: ireland@grace.nascom.nasa.gov
AF: ADNET Systems, Inc, NASA's GSFC MC 671.1, Greenbelt, MD 20771, United States
AU: Young, A
AF: ADNET Systems, Inc, NASA's GSFC MC 671.1, Greenbelt, MD 20771, United States
AU: McAteer, J
EM: j.mcateer@helio.gsfc.nasa.gov
AF: Catholic University of America, NASA's GSFC MC 671.1, Greenbelt, MD 20771, United States
AU: Whelan, C
EM: clairemwhelan@gmail.com
AF: University College Dublin, University College Dublin, Belfield, Dublin, 4, Ireland
AU: Hewett, R J
AF: Univ. Illinois at Urbana-Champaign, Univ. Illinois at Urbana-Champaign, Urbana, IL 61801, United States
AU: Gallagher, P T
AF: Trinity College Dublin, College Green, Dublin, 2, Ireland
AB: Two multi-resolution analyses are used to decompose active region magnetic fields into objects of different lengthscales, allowing one to examine the structure of the active region field at different lengthscales. Lines separating opposite polarity groupings of flux at different lengthscales are found (a generalization of the notion of a magnetic neutral line). It is shown that the average magnetic field gradient for alpha, beta, beta-gamma, and beta-gamma-delta active regions increases in the order listed, and that the order is maintained over all length-scales. Since magnetic field gradient is strongly linked to active region activity, such as flares, this study demonstrates that, on average, the Mt. Wilson classification encodes the notion of activity over all lengthscales in the active region, and not just those lengthscales at which the strongest field gradients are found. Properties of these generalized neutral lines are also correlated with GOES flare activity in a search for an indicator of flare activity.
DE: 7519 Flares
DE: 7524 Magnetic fields
SC: SPA-Solar and Heliospheric Physics [SH]
MN: 2007 Fall Meeting