192 citations · 748 across the 25 of their papers we have counts for
14 papers · 1 filter
Twisted Magnetic Knots and Links
Simon Candelaresi, Celine Beck
For magnetic knots and links in plasmas we introduce an internal twist and study their dynamical behavior in numerical simulations. We use a set of helical and non-helical configur…
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…
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…
Superflare occurrence and energies on G-, K- and M-type dwarfs
Simon Candelaresi, Andrew Hillier, Hiroyuki Maehara +2
Kepler data from G-, K- and M-type stars are used to study conditions that lead to superflares with energies above . From the 117,661 stars included, 380 show su…
The kinetic helicity needed to drive large-scale dynamos
Simon Candelaresi, Axel Brandenburg
Magnetic field generation on scales large compared with the scale of the turbulent eddies is known to be possible via the so-called effect when the turbulence is helical and if…
Magnetic helicity fluxes and their effect on stellar dynamos
Simon Candelaresi, Axel Brandenburg
Magnetic helicity fluxes in turbulently driven alpha^2 dynamos are studied to demonstrate their ability to alleviate catastrophic quenching. A one-dimensional mean-field formalism…
Decay of helical and non-helical magnetic knots
Simon Candelaresi, Axel Brandenburg
We present calculations of the relaxation of magnetic field structures that have the shape of particular knots and links. A set of helical magnetic flux configurations is considere…
Magnetic helicity fluxes in alpha Omega dynamos
Simon Candelaresi, Axel Brandenburg
In turbulent dynamos the production of large-scale magnetic fields is accompanied by a separation of magnetic helicity in scale. The large- and small-scale parts increase in magnit…
Decay of trefoil and other magnetic knots
Simon Candelaresi, Fabio Del Sordo, Axel Brandenburg
Two setups with interlocked magnetic flux tubes are used to study the evolution of magnetic energy and helicity on magnetohydrodynamical (MHD) systems like plasmas. In one setup th…
Magnetic helicity transport in the advective gauge family
Simon Candelaresi, Alexander Hubbard, Axel Brandenburg +1
Magnetic helicity fluxes are investigated in a family of gauges in which the contribution from ideal magnetohydrodynamics takes the form of a purely advective flux. Numerical simul…
Influence of Magnetic Helicity in MHD
Simon Candelaresi, Fabio Del Sordo, Axel Brandenburg
Observations have shown that the Sun's magnetic field has helical structures. The helicity content in magnetic field configurations is a crucial constraint on the dynamical evoluti…
Equatorial magnetic helicity flux in simulations with different gauges
Dhrubaditya Mitra, Simon Candelaresi, Piyali Chatterjee +2
We use direct numerical simulations of forced MHD turbulence with a forcing function that produces two different signs of kinetic helicity in the upper and lower parts of the domai…
Magnetic field decay of three interlocked flux rings with zero linking number
Fabio Del Sordo, Simon Candelaresi, Axel Brandenburg
The resistive decay of chains of three interlocked magnetic flux rings is considered. Depending on the relative orientation of the magnetic field in the three rings, the late-time…
Small-scale magnetic helicity losses from a mean-field dynamo
Axel Brandenburg, Simon Candelaresi, Piyali Chatterjee
Using mean-field models with a dynamical quenching formalism we show that in finite domains magnetic helicity fluxes associated with small-scale magnetic fields are able to allevia…