7 papers
UK White Paper on Magnetic Reconnection
Alexander J. B. Russell, James A. McLaughlin, Philippa Browning +25
Magnetic reconnection powers explosive releases of magnetic energy, heating and particle acceleration throughout the plasma universe. Knowledge of this universal process is vital t…
Topological Constraints in the Reconnection of Vortex Braids
Simon Candelaresi, Gunnar Hornig, Benjamin Podger +1
We study the relaxation of a topologically non-trivial vortex braid with zero net helicity in a barotropic fluid. The aim is to investigate the extent to which the topology of the…
Estimating the rate of field line braiding in the solar corona by photospheric flows
Simon Candelaresi, David Pontin, Anthony Yeates +2
In this paper we seek to understand the timescale on which the photospheric motions on the Sun braid coronal magnetic field lines. This is a crucial ingredient for determining the…
Quantifying the Tangling of Trajectories Using the Topological Entropy
Simon Candelaresi, David Ian Pontin, Gunnar Hornig
We present a simple method to efficiently compute a lower limit of the topological entropy and its spatial distribution for two-dimensional mappings. These mappings could represent…
Effects of Fieldline Topology on Energy Propagation in the Corona
Simon Candelaresi, David Ian Pontin, Gunnar Hornig
We study the effect of photospheric footpoint motions on magnetic field structures containing magnetic nulls. The footpoint motions are prescribed on the photospheric boundary as a…
The global distribution of magnetic helicity in the solar corona
A. R. Yeates, G. Hornig
By defining an appropriate field line helicity, we apply the powerful concept of magnetic helicity to the problem of global magnetic field evolution in the Sun's corona. As an idea…