Zobrazeno 1 - 10
of 137
pro vyhledávání: '"Pontin, D. I."'
Publikováno v:
The Astrophysical Journal, 960:51 (19pp), 2024 January 1
In this paper we propose that flux cancellation on small granular scales ($\lesssim 1000$ km) ubiquitously drives reconnection at a multitude of sites in the low solar atmosphere, contributing to chromospheric/coronal heating and the generation of th
Externí odkaz:
http://arxiv.org/abs/2401.11643
The slow solar wind is generally believed to result from the interaction of open and closed coronal magnetic flux at streamers and pseudostreamers. We use 3-dimensional magnetohydrodynamic simulations to determine the detailed structure and dynamics
Externí odkaz:
http://arxiv.org/abs/2201.02388
Autor:
Wyper, P. F., Pontin, D. I.
Observations of solar flare ribbons show significant fine structure in the form of breaking wave-like perturbations and spirals. The origin of this structure is not well understood, but one possibility is that it is related to the tearing instability
Externí odkaz:
http://arxiv.org/abs/2108.10966
Publikováno v:
A&A 639, A21 (2020)
Aims: Emission line profiles from solar coronal loops exhibit properties that are unexplained by current models. We investigate the non-thermal broadening associated with plasma heating in coronal loops that is induced by magnetic field line braiding
Externí odkaz:
http://arxiv.org/abs/2008.11915
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
Coronal magnetic null points exist in abundance as demonstrated by extrapolations of the coronal field, and have been inferred to be important for a broad range of energetic events. These null points and their associated separatrix and spine field li
Externí odkaz:
http://arxiv.org/abs/1605.05704
We examine the dynamics of magnetic flux tubes containing non-trivial field line braiding (or linkage), using mathematical and computational modelling, in the context of testable predictions for the laboratory and their significance for solar coronal
Externí odkaz:
http://arxiv.org/abs/1512.05918