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SUMMARY:Population dynamics and black spots on the Sun:  Rothschild Lectur
 e - Stanislav Molchanov (University of North Carolina)
DTSTART:20220405T150000Z
DTEND:20220405T160000Z
UID:TALK171332@talks.cam.ac.uk
DESCRIPTION:The goal of the population dynamics theory is to describe the 
 particle systems whose evolution includes a random motion (migration) and 
 the birth-death processes. The theory must explain the visible effects of 
 high irregularity (intermittency)\, clusterization etc. of the real popula
 tions.\nMathematically\, the problem can be reduced to analysis of the non
 -linear equations of the KPP (Kolmogorov &ndash\; Petrovskii &ndash\; Pisk
 unov) type and the system of corresponding moment equations.\nDue to Ya.B.
  Zeldovich\, the magnetic field of the Sun (or hot stars) can be presented
  phenomenologically as an ensemble of the quasi &ndash\; particles (closed
  magnetic loops). Their evolution is similar to the population dynamics an
 d leads to the understanding of the black spots as a manifestation of the 
 intermittency of the magnetic fields. Almost all magnetic energy is concen
 trated in the spots. These spots cover a very small part of the surface of
  the Sun.
LOCATION:Seminar Room 1\, Newton Institute
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