103 citations · 414 across the 10 of their papers we have counts for
8 papers · 1 filter
Identifying solar-like magnetic cycles with Zeeman-Doppler-Imaging (ZDI)
Lisa T. Lehmann, Gaitee A. J. Hussain, Aline A. Vidotto +2
We are reaching the point where spectropolarimetric surveys have run for long enough to reveal solar-like magnetic activity cycles. In this paper we investigate what would be the b…
Hydrogen Non-Equilibrium Ionisation Effects in Coronal Mass Ejections
P. Pagano, A. Bemporad, D. H. Mackay
A new generation of coronagraphs to study the solar wind and CMEs are being developed and launched. These coronagraphs will heavily rely on multi-channel observations where visible…
Measuring stellar magnetic helicity density
K. Lund, M. Jardine, L. T. Lehmann +10
Helicity is a fundamental property of a magnetic field but to date it has only been possible to observe its evolution in one star - the Sun. In this paper we provide a simple techn…
Observing the simulations: Applying ZDI to 3D non-potential magnetic field simulations
L. T. Lehmann, G. A. J. Hussain, M. M. Jardine +2
The large-scale magnetic fields of stars can be obtained with the Zeeman-Doppler-Imaging (ZDI) technique, but their interpretation is still challenging as the contribution of the s…
Stellar Differential Rotation and Coronal Timescales
G. P. S. Gibb, M. M. Jardine, D. H. Mackay
We investigate the timescales of evolution of stellar coronae in response to surface differential rotation and diffusion. To quantify this we study both the formation time and life…
The Influence of the Magnetic Field on Running Penumbral Waves in the Solar Chromosphere
D. B. Jess, V. E. Reznikova, T. Van Doorsselaere +2
We use images of high spatial and temporal resolution, obtained using both ground- and space-based instrumentation, to investigate the role magnetic field inclination angles play i…
Chirality of High Latitude Filaments over Solar Cycle 23
A. R. Yeates, D. H. Mackay
A non-potential quasi-static evolution model coupling the Sun's photospheric and coronal magnetic fields is applied to the problem of filament chirality at high latitudes. For the…
A Non-potential Model for the Sun's Open Magnetic Flux
A. R. Yeates, D. H. Mackay, A. A. van Ballegooijen +1
Measurements of the interplanetary magnetic field (IMF) over several solar cycles do not agree with computed values of open magnetic flux from potential field extrapolations. The d…