In this paper we consider a random motion of magnetic bright points (MBP) associated with magnetic fields at the solar photosphere. The MBP transport in the short time range [0-20 minutes] has a subdiffusive character as the magnetic flux tends to accumulate at sinks of the flow field. Such a behavior can be rigorously described in the framework of a continuous time random walk leading to the fractional Fokker-Planck dynamics. This formalism, applied for the analysis of the solar subdiffusion of magnetic fields, generalizes the Leighton's model.
@article{arxiv.1111.3234,
title = {Subdiffusive transport in intergranular lanes on the Sun. The Leighton model revisited},
author = {Aleksander Stanislavsky and Karina Weron},
journal= {arXiv preprint arXiv:1111.3234},
year = {2011}
}