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SUMMARY:Modelling graph dynamics of flaring active regions using SDO/HMI d
 ata
DTSTART;VALUE=DATE-TIME:20161013T121500Z
DTEND;VALUE=DATE-TIME:20161013T124500Z
DTSTAMP;VALUE=DATE-TIME:20260722T171407Z
UID:indico-contribution-599@cern.ch
DESCRIPTION:Speakers: Anton Lukyanov (PhD student)\nEvolution of flaring a
 ctive regions (AR) shows high spatial complexity and nontrivial changes of
 \nobserved patterns over time. It is practically impossible to give detail
 ed description of\nmagnetogram morphology. This is why signatures are quit
 e often used: critical points\, neutral lines\,\nunsigned and signed areas
  of magnetic textures. However\, when comparing two magnetograms adjacent 
 in\ntime\, it is difficult to find or evaluate significant signature chang
 es because of high patterns\nvariability. This is why it is more convenien
 t to use approximating simplicial structures like\ngraphs\, namely set of 
 vertices connected by edges.\n\nWe compute so-called critical nets\, which
  consist of stable minima and maxima points connected by\nascending paths 
 in terms of Morse theory. Critical net approximates singular manifold of\n
 AR with graph which is rebuilt during evolution. Dynamics regimes can be c
 onveniently tracked using\nmethods of spectral geometry. For that we use d
 iscrete laplacian and its spectrum. We\npresent examples of critical nets 
 for flaring AR and estimations of their spectra.\n\nThis work was supporte
 d by the Russian Foundation for Basic Research (grant 15-01-09156 A)\n\nht
 tps://indico.particle.mephi.ru/event/4/contributions/599/
LOCATION:Milan Hotel Hall of the 2nd floor
URL:https://indico.particle.mephi.ru/event/4/contributions/599/
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