Zobrazeno 1 - 10
of 33
pro vyhledávání: '"Thurgood, J. O."'
Publikováno v:
A&A 621, A106 (2019)
(Abridged for ArXiv) An injection of energy towards a magnetic null point can drive reversals of current sheet polarity leading to time-dependent Oscillatory Reconnection, which is a possible explanation of how periodic phenomena can be generated whe
Externí odkaz:
http://arxiv.org/abs/1811.08831
Publikováno v:
Physics of Plasmas, 25, 072105 (2018)
Implosive formation of current sheets is a fundamental plasma process. Previous studies focused on the early time evolution, while here our primary aim is to explore the longer-term evolution, which may be critical for determining the efficiency of e
Externí odkaz:
http://arxiv.org/abs/1806.08157
Null collapse is an implosive process whereby MHD waves focus their energy in the vicinity of a null point, forming a current sheet and initiating magnetic reconnection. We consider, for the first time, the case of collapsing 3D magnetic null points
Externí odkaz:
http://arxiv.org/abs/1802.07076
Here we detail the dynamic evolution of localised reconnection regions about three-dimensional (3D) magnetic null points by using numerical simulation. We demonstrate for the first time that reconnection triggered by the localised collapse of a 3D nu
Externí odkaz:
http://arxiv.org/abs/1706.09662
Particle-in-cell simulations of the relaxation of electron beams in inhomogeneous solar wind plasmas
Autor:
Thurgood, J. O., Tsiklauri, D.
Publikováno v:
Journal of Plasma Physics, Volume 82, Issue 6 December 2016, 905820604
Previous theoretical considerations of electron beam relaxation in inhomogeneous plasmas have indicated that the effects of the irregular solar wind may account for the poor agreement of homogeneous modelling with the observations. Quasi-linear theor
Externí odkaz:
http://arxiv.org/abs/1612.01780
Autor:
Thurgood, J. O., Tsiklauri, D.
Aims. The simulation of three-wave interaction based plasma emission, thought to be the underlying mechanism for Type III solar radio bursts, is a challenging task requiring fully-kinetic, multi-dimensional models. This paper aims to resolve a contra
Externí odkaz:
http://arxiv.org/abs/1509.07004
There is intense interest in determining the precise contribution of Alfv\'enic waves propagating along solar structures to the problems of coronal heating and solar wind acceleration. Since the launch of SDO/AIA, it has been possible to resolve tran
Externí odkaz:
http://arxiv.org/abs/1406.5348
Autor:
Thurgood, J. O., McLaughlin, J. A.
Context: MHD waves and magnetic null points are both prevalent in many astrophysical plasmas, including the solar atmosphere. Interaction between waves and null points has been implicated as a possible mechanism for localised heating events. Aims: He
Externí odkaz:
http://arxiv.org/abs/1307.7001
Autor:
Thurgood, J. O., McLaughlin, J. A.
Context : In the linear, {\beta}=0 MHD regime, the transient properties of MHD waves in the vicinity of 2D null points are well known. The waves are decoupled and accumulate at predictable parts of the magnetic topology: fast waves accumulate at the
Externí odkaz:
http://arxiv.org/abs/1305.7073
Autor:
Thurgood, J. O., McLaughlin, J. A.
Where spatial gradients in the amplitude of an Alfven wave are non-zero, a nonlinear magnetic-pressure gradient acts upon the medium (the ponderomotive force). We investigate the nature of such a force in inhomogeneous 2.5D MHD plasmas by analysing s
Externí odkaz:
http://arxiv.org/abs/1302.4340