Outputs (42)

Magnetic reconnection (2024)
Book Chapter
Pontin, D. I., Wyper, P. F., & Priest, E. R. (2024). Magnetic reconnection. In A. Kumar Srivastava, M. Goossens, & I. Arregui (Eds.), Magnetohydrodynamic Processes in Solar Plasmas (345-414). Elsevier. https://doi.org/10.1016/b978-0-32-395664-2.00014-1

Magnetic reconnection is a fundamental astrophysical process and plays a key role in the dynamics of the Sun's atmosphere. It facilitates the rapid conversion of energy stored in the magnetic field into kinetic and thermal energy. This drives phenome... Read More about Magnetic reconnection.

Solar Eruptions in Nested Magnetic Flux Systems (2024)
Journal Article
Karpen, J. T., Kumar, P., Wyper, P. F., DeVore, C. R., & Antiochos, S. K. (2024). Solar Eruptions in Nested Magnetic Flux Systems. Astrophysical Journal, 966(1), Article 27. https://doi.org/10.3847/1538-4357/ad2eaa

The magnetic topology of erupting regions on the Sun is a key factor in the energy buildup and release, and the subsequent evolution of flares and coronal mass ejections (CMEs). The presence/absence of null points and separatrices dictates whether an... Read More about Solar Eruptions in Nested Magnetic Flux Systems.

Interchange reconnection dynamics in a solar coronal pseudo-streamer (2023)
Journal Article
Pellegrin-Frachon, T., Masson, S., Pariat, E., Wyper, P., & DeVore, C. (2023). Interchange reconnection dynamics in a solar coronal pseudo-streamer. Astronomy & Astrophysics, 675, Article A55. https://doi.org/10.1051/0004-6361/202245611

Context. The generation of the slow solar wind is still an open problem in heliophysics. One of the existing theories to explain the injection of coronal plasma in the interplanetary medium is based on interchange reconnection: the exchange of magnet... Read More about Interchange reconnection dynamics in a solar coronal pseudo-streamer.

Plasmoids, Flows, and Jets during Magnetic Reconnection in a Failed Solar Eruption (2023)
Journal Article
Kumar, P., T. Karpen, J., Antiochos, S. K., DeVore, C. R., Wyper, P. F., & Cho, K. (2023). Plasmoids, Flows, and Jets during Magnetic Reconnection in a Failed Solar Eruption. Astrophysical Journal, 943(2), Article 156. https://doi.org/10.3847/1538-4357/acaea4

We report a detailed analysis of a failed eruption and flare in active region 12018 on 2014 April 3 using multiwavelength observations from the Solar Dynamics Observatory/Atmospheric Imaging Assembly, IRIS, STEREO, and Hinode/Solar Optical Telescope.... Read More about Plasmoids, Flows, and Jets during Magnetic Reconnection in a Failed Solar Eruption.

Comparison of magnetic energy and helicity in coronal jet simulations (2023)
Journal Article
Pariat, E., Wyper, P., & Linan, L. (2023). Comparison of magnetic energy and helicity in coronal jet simulations. Astronomy & Astrophysics, 669, Article A33. https://doi.org/10.1051/0004-6361/202245142

Context. While non-potential (free) magnetic energy is a necessary element of any active phenomenon in the solar corona, its role as a marker of the trigger of the eruptive process remains elusive. Meanwhile, recent analyses of numerical simulations... Read More about Comparison of magnetic energy and helicity in coronal jet simulations.

The Imprint of Intermittent Interchange Reconnection on the Solar Wind (2022)
Journal Article
Wyper, P. F., DeVore, C., Antiochos, S., Pontin, D., Higginson, A. K., Scott, R., …Pelegrin-Frachon, T. (2022). The Imprint of Intermittent Interchange Reconnection on the Solar Wind. Astrophysical Journal Letters, 941(2), Article L29. https://doi.org/10.3847/2041-8213/aca8ae

The solar wind is known to be highly structured in space and time. Observations from Parker Solar Probe have revealed an abundance of so-called magnetic switchbacks within the near-Sun solar wind. In this Letter, we use a high-resolution, adaptive-me... Read More about The Imprint of Intermittent Interchange Reconnection on the Solar Wind.

An exact threshold for separator bifurcation (2022)
Journal Article
Prior, C., & Wyper, P. (2022). An exact threshold for separator bifurcation. Geophysical and Astrophysical Fluid Dynamics, 116(4), 321-349. https://doi.org/10.1080/03091929.2022.2085696

Reconnection involving magnetic separators is known to lead to the spontaneous generation of new separator pairs. In this work, we explore the bifurcation process for a system composed of a pair of null points with a joining separator. We begin with... Read More about An exact threshold for separator bifurcation.

The Dynamic Structure of Coronal Hole Boundaries (2022)
Journal Article
Aslanyan, V., Pontin, D., Scott, R., Higginson, A., Wyper, P., & Antiochos, S. (2022). The Dynamic Structure of Coronal Hole Boundaries. Astrophysical Journal, 931(2), Article 96. https://doi.org/10.3847/1538-4357/ac69ed

The boundaries of solar coronal holes are difficult to uniquely define observationally but are sites of interest in part because the slow solar wind appears to originate there. The aim of this article is to explore the dynamics of interchange magneti... Read More about The Dynamic Structure of Coronal Hole Boundaries.

The Dynamic Coupling of Streamers and Pseudostreamers to the Heliosphere (2022)
Journal Article
Aslanyan, V., Pontin, D., Higginson, A., Wyper, P., Scott, R., & Antiochos, S. (2022). The Dynamic Coupling of Streamers and Pseudostreamers to the Heliosphere. Astrophysical Journal, 929(2), Article 185. https://doi.org/10.3847/1538-4357/ac5d5b

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 three-dimensional magnetohydrodynamic simulations to determine the detailed structure and dynam... Read More about The Dynamic Coupling of Streamers and Pseudostreamers to the Heliosphere.

Spatially Separated Electron and Proton Beams in a Simulated Solar Coronal Jet (2021)
Journal Article
Pallister, R., Wyper, P. F., Pontin, D. I., DeVore, C. R., & Chiti, F. (2021). Spatially Separated Electron and Proton Beams in a Simulated Solar Coronal Jet. Astrophysical Journal, 923(2), Article 163. https://doi.org/10.3847/1538-4357/ac2e6d

Magnetic reconnection is widely accepted to be a major contributor to nonthermal particle acceleration in the solar atmosphere. In this paper we investigate particle acceleration during the impulsive phase of a coronal jet, which involves bursty reco... Read More about Spatially Separated Electron and Proton Beams in a Simulated Solar Coronal Jet.