Outputs (47)

Plumelets: Dynamic Filamentary Structures in Solar Coronal Plumes (2021)
Journal Article
Uritsky, V., DeForest, C., Karpen, J., DeVore, C., Kumar, P., Raouafi, N., & Wyper, P. (2021). Plumelets: Dynamic Filamentary Structures in Solar Coronal Plumes. Astrophysical Journal, 907(1), https://doi.org/10.3847/1538-4357/abd186

Solar coronal plumes long seemed to possess a simple geometry supporting spatially coherent, stable outflow without significant fine structure. Recent high-resolution observations have challenged this picture by revealing numerous transient, small-sc... Read More about Plumelets: Dynamic Filamentary Structures in Solar Coronal Plumes.

Observations and 3D Magnetohydrodynamic Modeling of a Confined Helical Jet Launched by a Filament Eruption (2019)
Journal Article
Doyle, L., Wyper, P. F., Scullion, E., McLaughlin, J. A., Ramsay, G., & Doyle, J. G. (2019). Observations and 3D Magnetohydrodynamic Modeling of a Confined Helical Jet Launched by a Filament Eruption. Astrophysical Journal, 887(2), Article 246. https://doi.org/10.3847/1538-4357/ab5d39

We present a detailed analysis of a confined filament eruption and jet associated with a C1.5 class solar flare. Multiwavelength observations from the Global Oscillations Network Group and Solar Dynamics Observatory reveal the filament forming over s... Read More about Observations and 3D Magnetohydrodynamic Modeling of a Confined Helical Jet Launched by a Filament Eruption.

First Detection of Plasmoids from Breakout Reconnection on the Sun (2019)
Journal Article
Kumar, P., Karpen, J. T., Antiochos, S. K., Wyper, P. F., & DeVore, C. R. (2019). First Detection of Plasmoids from Breakout Reconnection on the Sun. Astrophysical Journal Letters, 885(1), Article L15. https://doi.org/10.3847/2041-8213/ab45f9

Transient collimated plasma ejections (jets) occur frequently throughout the solar corona, in active regions, quiet Sun, and coronal holes. Although magnetic reconnection is generally agreed to be the mechanism of energy release in jets, the factors... Read More about First Detection of Plasmoids from Breakout Reconnection on the Sun.

Numerical Simulation of Helical Jets at Active Region Peripheries (2019)
Journal Article
Wyper, P. F., DeVore, C. R., & Antiochos, S. K. (2019). Numerical Simulation of Helical Jets at Active Region Peripheries. Monthly Notices of the Royal Astronomical Society, 490(3), 3679-3690. https://doi.org/10.1093/mnras/stz2674

Coronal jets are observed above minority polarity intrusions throughout the solar corona. Some of the most energetic occur on the periphery of active regions where the magnetic field is strongly inclined. These jets exhibit a non-radial propagation i... Read More about Numerical Simulation of Helical Jets at Active Region Peripheries.

Magnetic Structures at the Boundary of the Closed Corona: A Semi-automated Study of S-Web Morphology (2019)
Journal Article
Scott, R. B., Pontin, D. I., & Wyper, P. F. (2019). Magnetic Structures at the Boundary of the Closed Corona: A Semi-automated Study of S-Web Morphology. Astrophysical Journal, 882(2), Article 125. https://doi.org/10.3847/1538-4357/ab364a

Interchange reconnection is thought to play an important role in driving the dynamics of the slow solar wind. To understand the details of this process, it is important to catalog the various magnetic structures that are present at the boundary betwe... Read More about Magnetic Structures at the Boundary of the Closed Corona: A Semi-automated Study of S-Web Morphology.

Exploring Flaring Behaviour on Low Mass Stars, Solar-type Stars and the Sun (2019)
Journal Article
Doyle, L., Ramsay, G., Doyle, J., Wyper, P., Scullion, E., Wu, K., & McLaughlin, J. (2019). Exploring Flaring Behaviour on Low Mass Stars, Solar-type Stars and the Sun. Proceedings of the International Astronomical Union, 15(S354), 384-319. https://doi.org/10.1017/s1743921319009980

We report on our project to study the activity in both the Sun and low mass stars. Utilising high cadence, Hα observations of a filament eruption made using the CRISP spectropolarimeter mounted on the Swedish Solar Telescope has allowed us to determi... Read More about Exploring Flaring Behaviour on Low Mass Stars, Solar-type Stars and the Sun.

Multiwavelength Study of Equatorial Coronal-hole Jets (2019)
Journal Article
Kumar, P., Karpen, J. T., Antiochos, S. K., Wyper, P. F., DeVore, C. R., & DeForest, C. E. (2019). Multiwavelength Study of Equatorial Coronal-hole Jets. Astrophysical Journal, 873(1), Article 93. https://doi.org/10.3847/1538-4357/ab04af

Jets (transient/collimated plasma ejections) occur frequently throughout the solar corona and contribute mass/energy to the corona and solar wind. By combining numerical simulations and high-resolution observations, we have made substantial progress... Read More about Multiwavelength Study of Equatorial Coronal-hole Jets.

Proton acceleration at tearing coronal null-point current sheets (2019)
Journal Article
Pallister, R., Pontin, D., & Wyper, P. (2019). Proton acceleration at tearing coronal null-point current sheets. Astronomy & Astrophysics, 622, Article A207. https://doi.org/10.1051/0004-6361/201834284

Context. Non-thermal particle acceleration in the solar corona is thought to constitute a substantial part of the energy budget of explosive events such as solar flares. One well-established mechanism of non-thermal acceleration is directly via field... Read More about Proton acceleration at tearing coronal null-point current sheets.

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.

A Model for Coronal Hole Bright Points and Jets Due to Moving Magnetic Elements (2018)
Journal Article
Wyper, P., DeVore, C., Karpen, J., Antiochos, S., & Yeates, A. (2018). A Model for Coronal Hole Bright Points and Jets Due to Moving Magnetic Elements. Astrophysical Journal, 864(2), Article 165. https://doi.org/10.3847/1538-4357/aad9f7

Coronal jets and bright points occur prolifically in predominantly unipolar magnetic regions, such as coronal holes (CHs), where they appear above minority-polarity intrusions. Intermittent low-level reconnection and explosive, high-energy-release re... Read More about A Model for Coronal Hole Bright Points and Jets Due to Moving Magnetic Elements.