"Statistical moments and multipoint magnetic field correlators in a galactic dynamo model with random turbulent diffusion"
Grachev D.A., Elistratov S.A., and Mikhailov E.A.

In this paper we consider a stochastic model of the galactic dynamo in which the coefficient of turbulent diffusion is considered as a random process with renewal. The numerical simulation of statistical moments as well as two-point and three-point correlators of the magnetic field showing the relation between its values at various time instants is performed. The presence of intermittency expressed in the progressive growth of moments and correlators in the case of "quiet" regions of galaxies with a small fraction of the ionized hydrogen component is shown. The numerical results are compared with the results obtained analytically earlier.

Keywords: galactic dynamo, magnetic field, equations with random coefficients, intermittency, statistical moment.

  • Grachev D.A. – Lomonosov Moscow State University, Faculty of Physics; Leninskie Gory, Moscow, 119992, Russia; Ph.D., Scientist, e-mail: dengrac@mail.ru
  • Elistratov S.A. – Lomonosov Moscow State University, Faculty of Physics; Leninskie Gory, Moscow, 119992, Russia; Student, e-mail: invsbl_mn@mail.ru
  • Mikhailov E.A. – Lomonosov Moscow State University, Faculty of Physics; Leninskie Gory, Moscow, 119992, Russia; Ph.D., Assistant, e-mail: ea.mikhajlov@physics.msu.ru