61 citations · 421 across the 31 of their papers we have counts for
5 papers · 1 filter
Crisis-induced intermittency due to attractor-widening in a buoyancy-driven solar dynamo
Eurico Covas, Mathieu Ossendrijver
In a recent paper [M. A. J. H. Ossendrijver, A&A {\bf 359}, 364 (2000)] numerical simulations of a 2D mean--field model where shown to produce grand minima, typical of the long-ter…
The influence of noise on scalings for in-out intermittency
Peter Ashwin, Eurico Covas, Reza Tavakol
We study the effects of noise on a recently discovered form of intermittency, referred to as in-out intermittency. This type of intermittency, which reduces to on-off in systems wi…
In--out intermittency in PDE and ODE models
Eurico Covas, Reza Tavakol, Peter Ashwin +2
We find concrete evidence for a recently discovered form of intermittency, referred to as in--out intermittency, in both PDE and ODE models of mean field dynamos. This type of inte…
Spatiotemporal fragmentation and the uncertainties in the solar rotation law
Eurico Covas, Reza Tavakol, Sergei Vorontsov +1
Analyses of recent helioseismic data indicate that the dynamical regimes at the base of the convection zone can be different from those observed at the top, having either significa…
Aspects of the dynamics underlying solar and stellar dynamo models
Reza Tavakol, Eurico Covas
Observations of the Sun and solar-type stars continue to reveal phenomena whose understanding is very likely to require a nonlinear framework. Here we shall concentrate on two such…