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Research Themes and Scholarly Interests

I obtained my PhD in solar physics in 2014 at the University of Glasgow on the “Spatial, spectral and polarisation properties of solar flare X-ray sources” before becoming a postdoctoral researcher at the University of Glasgow. In 2019, I joined Northumbria University as a Vice-Chancellor Fellow/Lecturer.

My research studies solar flares, huge releases of energy in the Sun’s atmosphere. Solar flares provide us with an astrophysical laboratory for understanding processes such as magnetic reconnection and turbulence, and the production and properties of energetic particles. My work uses high energy observations (X-ray, EUV) to study flares and energetic particles at the Sun, and the creation of kinetic models to study particle acceleration and particle and x-ray transport effects in flares. 

My current list of publications can be found here.

I am currently leading an International Space Science Institute (ISSI) Bern team Solar flare acceleration signatures and their connection to solar energetic particles with Dr Frederic Effenberger (Helmholtz Centre, Potsdam, Germany) with the aim to understand the connection between different populations of energetic particles produced at the Sun and in the heliosphere, and how they can be used to further our understanding of astrophysical plasma processes and astrophysical particle acceleration in general.

Between 2016 and 2018 I received the following prizes for my research: European Geophysical Union (EGU) Solar-­Terrestrial Early Career Researcher Prize, European Physical Society (EPS) Solar Physics Division (ESPD) Early Career Researcher Prize, and the EPS Plasma Physics Thesis Prize. 

I am currently the deputy chair of the UK Solar Physics council.

My current CV can be found here.



Key Publications

  • Please visit the Pure Research Information Portal for further information
  • Probing solar flare accelerated electron distributions with prospective X-ray polarimetry missions, Jeffrey, N., Saint-Hilaire, P., Kontar, E. Oct 2020, In: Astronomy & Astrophysics
  • Subsecond Time Evolution of Type III Solar Radio Burst Sources at Fundamental and Harmonic Frequencies, Chen, X., Kontar, E., Chrysaphi, N., Jeffrey, N., Gordovskyy, M., Yan, Y., Tan, B. 10 Dec 2020, In: Astrophysical Journal
  • Anisotropic Radio-Wave Scattering and the Interpretation of Solar Radio Emission Observations, Kontar, E., Chen, X., Chrysaphi, N., Jeffrey, N., Emslie, A., Krupar, V., Maksimovic, M., Gordovskyy, M., Browning, P. 17 Oct 2019, In: Astrophysical Journal
  • Determination of the Total Accelerated Electron Rate and Power Using Solar Flare Hard X-Ray Spectra, Kontar, E., Jeffrey, N., Emslie, A. 4 Feb 2019, In: Astrophysical Journal
  • Global Energetics of Solar Flares. VIII. The Low-energy Cutoff, Aschwanden, M., Kontar, E., Jeffrey, N. 10 Aug 2019, In: Astrophysical Journal
  • The Role of Energy Diffusion in the Deposition of Energetic Electron Energy in Solar and Stellar Flares, Jeffrey, N., Kontar, E., Fletcher, L. Aug 2019, In: Astrophysical Journal
  • Erratum: Publisher Correction: Imaging spectroscopy of solar radio burst fine structures (Nature communications (2017) 8 1 (1515)), Kontar, E., Yu, S., Kuznetsov, A., Emslie, A., Alcock, B., Jeffrey, N., Melnik, V., Bian, N., Subramanian, P. 1 Dec 2018, In: Nature Communications
  • Frequency rising sub-THz emission from solar flare ribbons, Kontar, E., Motorina, G., Jeffrey, N., Tsap, Y., Fleishman, G., Stepanov, A. Dec 2018, In: Astronomy and Astrophysics
  • Spectroscopic Measurements of the Ion Velocity Distribution at the Base of the Fast Solar Wind, Jeffrey, N., Hahn, M., Savin, D., Fletcher, L. Mar 2018, In: Astrophysical Journal Letters

PGR Supervision

Morgan Stores Start Date: 18/01/2021


Physics PhD December 31 2014

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