66 citations · 510 across the 25 of their papers we have counts for
25 papers
Calculation of Field Line Slippage Rates in Coronal Simulations
Valentin Aslanyan, David MacTaggart, Roger B. Scott +6
We present the Universal Slippage calculator (\texttt{USlip}), an extension of the Universal Fieldline Tracer (\texttt{UFiT}), that computes magnetic field line slippage rates from…
Solar Wind Dependence on Source Distance from the Open-Closed Boundary
Chloe P. Wilkins, David I. Pontin, Anthony R. Yeates +2
The origin and variability of the slow solar wind remains an open question in solar physics, but is thought to be closely linked to dynamics at the Sun's open-closed magnetic flux…
UK White Paper on Space-based total solar eclipse observations: structure and dynamics of the solar atmosphere
Lucie M. Green, Nicola Baresi, Huw Morgan +19
Our Sun is uniquely placed to enable a detailed study of astrophysical plasmas and how they are governed by the magnetic fields that thread through them. On the one hand, magnetic…
Global Coronal Equilibria with Solar Wind Outflow II -- Optimizing the Outflow Model
Oliver Rice, Anthony Yeates
We expand upon our paper (Rice and Yeates, 2021) which introduced `Outflow Fields': alternatives to the widely-used potential field source surface (PFSS) extrapolations of the Sun'…
Energy Bounds from Relative Magnetic Helicity in Spherical Shells
Anthony R. Yeates, Gunnar Hornig
Relative magnetic helicity is commonly used in solar physics to avoid the well known gauge ambiguity of standard magnetic helicity in magnetically open domains. But its physical in…
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…
Witnessing Magnetic Reconnection in Tangled Superpenumbral Fibrils Around a Sunspot
Hechao Chen, Hui Tian, Eric R. Priest +8
Three-dimensional magnetic reconnection is a fundamental plasma process crucial for heating the solar corona and generating the solar wind, but resolving and characterizing it on t…
The Sun's open-closed flux boundary and the origin of the slow solar wind
Chloe P. Wilkins, David I. Pontin, Anthony R. Yeates +3
The Sun's open-closed flux boundary (OCB) separates closed and open magnetic field lines, and is the site for interchange magnetic reconnection processes thought to be linked to th…
Latitude Quenching Nonlinearity in the Solar Dynamo
Anthony R. Yeates, Luca Bertello, Alexander A. Pevtsov +1
We compare two candidate nonlinearities for regulating the solar cycle within the Babcock-Leighton paradigm: tilt quenching (whereby the tilt of active regions is reduced in strong…
Two Classes of Eruptive Events During Solar Minimum
P. Bhowmik, A. R. Yeates
During solar minimum, the Sun is relatively inactive with few sunspots observed on the solar surface. Consequently, we observe a smaller number of highly energetic events such as s…
A Model for Coronal Hole Bright Points and Jets due to Moving Magnetic Elements
Peter F. Wyper, C. Richard DeVore, Judy T. Karpen +2
Coronal jets and bright points occur prolifically in predominantly unipolar magnetic regions, such as coronal holes, where they appear above minority-polarity intrusions. Intermitt…
How many active regions are necessary to predict the solar dipole moment?
T. Whitbread, A. R. Yeates, A. Muñoz-Jaramillo
We test recent claims that the polar field at the end of Cycle 23 was weakened by a small number of large, abnormally oriented regions, and investigate what this means for solar cy…
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…
Parameter optimization for surface flux transport models
T. Whitbread, A. R. Yeates, A. Muñoz-Jaramillo +1
Accurate prediction of solar activity calls for precise calibration of solar cycle models. Consequently we aim to find optimal parameters for models which describe the physical pro…
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…
Physical role of topological constraints in localised magnetic relaxation
A. R. Yeates, A. J. B. Russell, G. Hornig
Predicting the final state of turbulent plasma relaxation is an important challenge, both in astrophysical plasmas such as the Sun's corona and in controlled thermonuclear fusion.…
On the Helicity of Open Magnetic Fields
C. Prior, A. R. Yeates
We reconsider the topological interpretation of magnetic helicity for magnetic fields in open domains, and relate this to the relative helicity. Specifically, our domains stretch b…
Kinematic active region formation in a three-dimensional solar dynamo model
A. R. Yeates, A. Muñoz-Jaramillo
We propose a phenomenological technique for modelling the emergence of active regions within a three-dimensional, kinematic dynamo framework. By imposing localised velocity perturb…
A complete topological invariant for braided magnetic fields
A. R. Yeates, G. Hornig
A topological flux function is introduced to quantify the topology of magnetic braids: non-zero line-tied magnetic fields whose field lines all connect between two boundaries. This…
Unique Topological Characterization of Braided Magnetic Fields
A. R. Yeates, G. Hornig
We introduce a topological flux function to quantify the topology of magnetic braids: non-zero, line-tied magnetic fields whose field lines all connect between two boundaries. This…
Heating of braided coronal loops
A. L. Wilmot-Smith, D. I. Pontin, A. R. Yeates +1
We investigate the relaxation of braided magnetic loops in order to find out how the type of braiding via footpoint motions affects resultant heating of the loop. Two magnetic loop…
Lagrangian coherent structures in photospheric flows and their implications for coronal magnetic structure
A. R. Yeates, G. Hornig, B. T. Welsch
Aims. We show how the build-up of magnetic gradients in the Sun's corona may be inferred directly from photospheric velocity data. This enables computation of magnetic connectivity…
A Generalized Flux Function for Three-dimensional Magnetic Reconnection
A. R. Yeates, G. Hornig
The definition and measurement of magnetic reconnection in three-dimensional magnetic fields with multiple reconnection sites is a challenging problem, particularly in fields lacki…
Dynamical constraints from field line topology in magnetic flux tubes
A. R. Yeates, G. Hornig
A topological constraint on the dynamics of a magnetic field in a flux tube arises from the fixed point indices of its field line mapping. This can explain unexpected behaviour in…