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SUMMARY:Thin layer axion dynamo
DTSTART;VALUE=DATE-TIME:20241025T142100Z
DTEND;VALUE=DATE-TIME:20241025T143300Z
DTSTAMP;VALUE=DATE-TIME:20260305T201854Z
UID:indico-contribution-4115@cern.ch
DESCRIPTION:Speakers: Maxim Dvornikov (Institute of Terrestrial Magnetism\
 , Ionosphere and Radiowave Propagation (IZMIRAN))\nWe study interacting cl
 assical magnetic and pseudoscalar fields in frames of the axion electrodyn
 amics. A large scale pseudoscalar field can be the coherent superposition 
 of axions or axion like particles. We consider the evolution of these fiel
 ds inside a spherical clump. Decomposing the magnetic field into the poloi
 dal and toroidal components\, we take into account their symmetry properti
 es. Within a spherical clump\, we use a thin layer approximation in the in
 duction and Klein-Gordon equations\, where the dependence of the fields  o
 n the latitude is accounted for. Then\, we derive the dynamo equations in 
 the low mode approximation. The nonlinear evolution equations for the harm
 onics of the magnetic and pseudoscalar fields are solved numerically. As a
 n application\, we consider a dense axion star embedded in solar plasma. T
 he behavior of the harmonics and their typical oscillations frequencies ar
 e obtained. We suggest that such small size axionic objects\, containing o
 scillating magnetic fields\, can cause electromagnetic flashes\, recently 
 observed in the solar corona\, contributing to the corona heating.\n\nRefe
 rences\n\nM. Dvornikov\, Thin layer axion dynamo\, to be published in Eur.
  Phys. J. C\, arxiv:2401.03185.\n\nhttps://indico.particle.mephi.ru/event/
 436/contributions/4115/
LOCATION: Moskvorechye 2
URL:https://indico.particle.mephi.ru/event/436/contributions/4115/
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