25 Years of Self-Organized Criticality: Solar and Astrophysics

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dc.contributor.author Milovanov, A.V.
dc.date.accessioned 2016-02-10T15:10:36Z
dc.date.available 2016-02-10T15:10:36Z
dc.date.issued 2016
dc.identifier.issn 0038-6308
dc.identifier.uri http://hdl.handle.net/10840/7392
dc.description.abstract Shortly after the seminal paper “Self-Organized Criticality: An explanation of 1/fnoise” by Bak et al. (1987), the idea has been applied to solar physics, in “Avalanches and the Distribution of Solar Flares” by Lu and Hamilton (1991). In the following years, an inspiring cross-fertilization from complexity theory to solar and astrophysics took place, where the SOC concept was initially applied to solar flares, stellar flares, and magnetospheric substorms, and later extended to the radiation belt, the heliosphere, lunar craters, the asteroid belt, the Saturn ring, pulsar glitches, soft X-ray repeaters, blazars, black-hole objects, cosmic rays, and boson clouds. The application of SOC concepts has been performed by numerical cellular automaton simulations, by analytical calculations of statistical (powerlaw-like) distributions based on physical scaling laws, and by observational tests of theoretically predicted size distributions and waiting time distributions. Attempts have been undertaken to import physical models into the numerical SOC toy models, such as the discretization of magneto-hydrodynamics (MHD) processes. The novel applications stimulated also vigorous debates about the discrimination between SOC models, SOC-like, and non-SOC processes, such as phase transitions, turbulence, random-walk diffusion, percolation, branching processes, network theory, chaos theory, fractality, multi-scale, and other complexity phenomena. We review SOC studies from the last 25 years and highlight new trends, open questions, and future challenges, as discussed during two recent ISSI workshops on this theme. © 2014, The Author(s). it_IT
dc.language.iso en it_IT
dc.publisher Springer Netherlands it_IT
dc.relation.ispartof Space Science Reviews it_IT
dc.title 25 Years of Self-Organized Criticality: Solar and Astrophysics it_IT
dc.type Articolo su rivista it_IT
dc.description.riferimenti Scopus ID: 2-s2.0-84950326949
dc.description.sede-enea Centro Ricerche Frascati it_IT
dc.relation.issuenumber 1-4 it_IT
dc.relation.pagenumber 47 - 166 it_IT
dc.relation.volumenumber 198 it_IT
dc.subject.keywords Cosmic rays it_IT
dc.subject.keywords Instabilities it_IT
dc.subject.keywords Methods: statistical it_IT
dc.subject.keywords Planets and satellites: rings it_IT
dc.subject.keywords Stars: flare it_IT
dc.subject.keywords Sun: flare it_IT
dc.subject.tipologia-enea Fusione it_IT
dc.description.info Authors: Aschwanden M.J., Crosby N.B., Dimitropoulou M., Georgoulis M.K., Hergarten S., McAteer J., Milovanov A.V., Mineshige S., Morales L., Nishizuka N., Pruessner G., Sanchez R., Sharma A.S., Strugarek A., Uritsky V. it_IT
dc.identifier.doi 10.1007/s11214-014-0054-6
dc.identifier.url http://www.scopus.com/inward/record.url?eid=2-s2.0-84950326949&partnerID=40&md5=6cfb693b8fc383e5e52080db9dec27fa

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