Modelling graph dynamics of flaring active regions using SDO/HMI data. / Lukyanov, A. D.; Knyazeva, I. S.
In: Journal of Physics: Conference Series, Vol. 798, No. 1, 012181, 07.03.2017.Research output: Contribution to journal › Article › peer-review
}
TY - JOUR
T1 - Modelling graph dynamics of flaring active regions using SDO/HMI data
AU - Lukyanov, A. D.
AU - Knyazeva, I. S.
PY - 2017/3/7
Y1 - 2017/3/7
N2 - Large solar flares define parameters of space weather near the Earth and normal operation of spacecrafts substantially depends on the cosmic particles flux of solar wind. Therefore, search for large flares predictors is an important problem. We propose to approximate topology of the magnetic field of active region by graph, whose vertices are minima and maxima of a scalar field and edges form a so-called critical net. Localization and number of critical points change during the process of evolution and, therefore, it is possible to track dynamic regimes of active region by considering dynamics of graphs. Numerical characteristic of the critical net is a spectrum of eigenvalues of its discrete Laplacian. We present examples which show that, apparently, Laplacian spectrum is closely related to flaring activity. It will allow us to use critical net in prognostic systems for prediction of large solar flares.
AB - Large solar flares define parameters of space weather near the Earth and normal operation of spacecrafts substantially depends on the cosmic particles flux of solar wind. Therefore, search for large flares predictors is an important problem. We propose to approximate topology of the magnetic field of active region by graph, whose vertices are minima and maxima of a scalar field and edges form a so-called critical net. Localization and number of critical points change during the process of evolution and, therefore, it is possible to track dynamic regimes of active region by considering dynamics of graphs. Numerical characteristic of the critical net is a spectrum of eigenvalues of its discrete Laplacian. We present examples which show that, apparently, Laplacian spectrum is closely related to flaring activity. It will allow us to use critical net in prognostic systems for prediction of large solar flares.
UR - http://www.scopus.com/inward/record.url?scp=85016242137&partnerID=8YFLogxK
U2 - 10.1088/1742-6596/798/1/012181
DO - 10.1088/1742-6596/798/1/012181
M3 - Article
AN - SCOPUS:85016242137
VL - 798
JO - Journal of Physics: Conference Series
JF - Journal of Physics: Conference Series
SN - 1742-6588
IS - 1
M1 - 012181
ER -
ID: 9327480