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Order out of randomness: Self-organization processes in astrophysics View all abstracts by submitter

Markus J Aschwanden   Submitted: 2019-06-13 09:49

Self-organization is a property of dissipative nonlinear processes that are gov- erned by a global driving force and a local positive feedback mechanism, which creates regular geometric and/or temporal patterns, and decreases the entropy locally, in contrast to random processes. Here we investigate for the first time a comprehensive number of (17) self-organization processes that operate in planetary physics, solar physics, stellar physics, galactic physics, and cosmology. Self-organizing systems create spontaneous ?order out of randomness?, during the evolution from an initially disordered system to an ordered quasistationary system, mostly by quasi-periodic limit-cycle dynamics, but also by harmonic (me- chanical or gyromagnetic) resonances. The global driving force can be due to gravity, elec- tromagnetic forces, mechanical forces (e.g., rotation or differential rotation), thermal pres- sure, or acceleration of nonthermal particles, while the positive feedback mechanism is of- ten an instability, such as the magneto-rotational (Balbus-Hawley) instability, the convective (Rayleigh-B?nard) instability, turbulence, vortex attraction, magnetic reconnection, plasma condensation, or a loss-cone instability. Physical models of astrophysical self-organization processes require hydrodynamic, magneto-hydrodynamic (MHD), plasma, or N-body simu- lations. Analytical formulations of self-organizing systems generally involve coupled differ- ential equations with limit-cycle solutions of the Lotka-Volterra or Hopf-bifurcation type.

Authors: Aschwanden,M.J., Scholkmann,F., Bethune,W., Schmutz,W., Abramenko,W., Cheung,M.C.M., Mueller,D., Benz,A.O., Chernov,G., Kritsuk,A.G., Scargle,J.D., Melatos,A., Wagoner,R.V., Trimble,V., Green,W.
Projects: None

Publication Status: Space Science Reviews 214:55
Last Modified: 2019-06-15 17:41
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