Multiscale self-organized criticality and powerful X-ray flares
نویسندگان
چکیده
A combination of spectral and moments analysis of the continuous X-ray flux data is used to show consistency of statistical properties of the powerful solar flares with 2D BTW prototype model of self-organized criticality. PACS. 05.65.+b Self-organized systems – 05.45.Tp Time series analysis – 96.60.Rd Flares, bursts, and related phenomena
منابع مشابه
ar X iv : a st ro - p h / 03 11 44 5 v 1 1 9 N ov 2 00 3 Multiscale self - organized criticality and powerful X - ray flares
A combination of spectral and moments analysis of the continuous X-ray flux data is used to show consistency of statistical properties of the powerful solar flares with 2D BTW prototype model of self-organized criticality.
متن کاملAvalanche Models for Solar Flares (invited Review)
This paper is a pedagogical introduction to avalanche models of solar flares, including a comprehensive review of recent modeling efforts and directions. This class of flare model is built on a recent paradigm in statistical physics, known as self-organized criticality. The basic idea is that flares are the result of an ‘avalanche’ of small-scale magnetic reconnection events cascading through a...
متن کاملThe Spatio-temporal Evolution of Solar Flares Observed with Aia/sdo: Fractal Diffusion, Sub-diffusion, or Logistic Growth?
We explore the spatio-temporal evolution of solar flares by fitting a radial expansion model r(t) that consists of an exponentially growing acceleration phase, followed by a deceleration phase that is parameterized by the generalized diffusion function r(t) ∝ κ(t − t1), which includes the logistic growth limit (β = 0), sub-diffusion (β = 0–1), classical diffusion (β = 1), super-diffusion (β = 1...
متن کاملDerivation of Solar Flare Cellular Automata Models from a Subset of the Magnetohydrodynamic Equations
Cellular automata (CA) models account for the power-law distributions found for solar flare hard X-ray observations, but their physics has been unclear. We examine four of these models and show that their criteria and magnetic field distribution rules can be derived by discretizing the MHD diffusion equation as obtained from a simplified Ohm’s law. Identifying the discrete MHD with the CA model...
متن کاملFrom Solar and Stellar Flares to Coronal Heating: Theory and Observations of How Magnetic Reconnection Regulates Coronal Conditions
There is currently no explanation of why the corona has the temperature and density it has. We present a model which explains how the dynamics of magnetic reconnection regulates the conditions in the corona. A bifurcation in magnetic reconnection at a critical state enforces an upper bound on the coronal temperature for a given density. We present observational evidence from 107 flares in 37 su...
متن کامل