Outputs (8)

Magnetic Structures at the Boundary of the Closed Corona: Interpretation of S-Web Arcs (2018)
Journal Article
Scott, R. B., Pontin, D. I., Yeates, A. R., Wyper, P. F., & Higginson, A. K. (2018). Magnetic Structures at the Boundary of the Closed Corona: Interpretation of S-Web Arcs. Astrophysical Journal, 869(1), Article 60. https://doi.org/10.3847/1538-4357/aaed2b

The topology of coronal magnetic fields near the open-closed magnetic flux boundary is important to the the process of interchange reconnection, whereby plasma is exchanged between open and closed flux domains. Maps of the magnetic squashing factor i... Read More about Magnetic Structures at the Boundary of the Closed Corona: Interpretation of S-Web Arcs.

Magnetic Helicity Condensation and the Solar Cycle (2018)
Journal Article
Mackay, D. H., DeVore, C. R., Antiochos, S. K., & Yeates, A. R. (2018). Magnetic Helicity Condensation and the Solar Cycle. Astrophysical Journal, 869(1), Article 62. https://doi.org/10.3847/1538-4357/aaec7c

Solar filaments exhibit a global chirality pattern where dextral/sinistral filaments, corresponding to negative/positive magnetic helicity, are dominant in the northern/southern hemisphere. This pattern is opposite to the sign of magnetic helicity in... Read More about Magnetic Helicity Condensation and the Solar Cycle.

Relative field-line helicity in bounded domains (2018)
Journal Article
Yeates, A., & Page, M. (2018). Relative field-line helicity in bounded domains. Journal of Plasma Physics, 84(6), Article 775840602. https://doi.org/10.1017/s0022377818001204

Models for astrophysical plasmas often have magnetic field lines that leave the boundary rather than closing within the computational domain. Thus, the relative magnetic helicity is frequently used in place of the usual magnetic helicity, so as to re... Read More about Relative field-line helicity in bounded domains.

Estimating the Rate of Field Line Braiding in the Solar Corona by Photospheric Flows (2018)
Journal Article
Candelaresi, S., Pontin, D., Yeates, A., Bushby, P., & Hornig, G. (2018). Estimating the Rate of Field Line Braiding in the Solar Corona by Photospheric Flows. Astrophysical Journal, 864(2), Article 157. https://doi.org/10.3847/1538-4357/aad8bc

In this paper, we seek to understand the timescale in which the photospheric motions on the Sun braid coronal magnetic field lines. This is a crucial ingredient for determining the viability of the braiding mechanism for explaining the high temperatu... Read More about Estimating the Rate of Field Line Braiding in the Solar Corona by Photospheric Flows.

Global Non-Potential Magnetic Models of the Solar Corona During the March 2015 Eclipse (2018)
Journal Article
Yeates, A., Amari, T., Contopoulos, I., Feng, X., Mackay, D., Mikic, Z., …Torok, T. (2018). Global Non-Potential Magnetic Models of the Solar Corona During the March 2015 Eclipse. Space Science Reviews, 214, Article 99. https://doi.org/10.1007/s11214-018-0534-1

Seven different models are applied to the same problem of simulating the Sun’s coronal magnetic field during the solar eclipse on 2015 March 20. All of the models are non-potential, allowing for free magnetic energy, but the associated electric curre... Read More about Global Non-Potential Magnetic Models of the Solar Corona During the March 2015 Eclipse.

Quantifying reconnective activity in braided vector fields (2018)
Journal Article
Prior, C., & Yeates, A. (2018). Quantifying reconnective activity in braided vector fields. Physical Review E, 98(1), Article 013204. https://doi.org/10.1103/physreve.98.013204

We introduce a technique for evaluating the changing connectivity of a vector field whose integral curves (field lines) form tangled tubular bundles. Applications of such fields include magnetic flux ropes, relativistic plasma jets, stirred two-dimen... Read More about Quantifying reconnective activity in braided vector fields.

A new technique for observationally derived boundary conditions for space weather (2018)
Journal Article
Pagano, P., Mackay, D. H., & Yeates, A. R. (2018). A new technique for observationally derived boundary conditions for space weather. Journal of Space Weather and Space Climate, 8, Article A26. https://doi.org/10.1051/swsc/2018012

Context. In recent years, space weather research has focused on developing modelling techniques to predict the arrival time and properties of coronal mass ejections (CMEs) at the Earth. The aim of this paper is to propose a new modelling technique su... Read More about A new technique for observationally derived boundary conditions for space weather.

The Large-scale Coronal Structure of the 2017 August 21 Great American Eclipse: An Assessment of Solar Surface Flux Transport Model Enabled Predictions and Observations (2018)
Journal Article
Nandy, D., Bhowmik, P., Yeates, A. R., Panda, S., Tarafder, R., & Dash, S. (2018). The Large-scale Coronal Structure of the 2017 August 21 Great American Eclipse: An Assessment of Solar Surface Flux Transport Model Enabled Predictions and Observations. Astrophysical Journal, 853(1), Article 72. https://doi.org/10.3847/1538-4357/aaa1eb

On 2017 August 21, a total solar eclipse swept across the contiguous United States, providing excellent opportunities for diagnostics of the Sun's corona. The Sun's coronal structure is notoriously difficult to observe except during solar eclipses; t... Read More about The Large-scale Coronal Structure of the 2017 August 21 Great American Eclipse: An Assessment of Solar Surface Flux Transport Model Enabled Predictions and Observations.