2021

Stores, M., Jeffrey, N. L.S. and Kontar, E. P. (2021) The spatial and temporal variations of turbulence in a solar flare. Astrophysical Journal, 923(1), 40. (doi: 10.3847/1538-4357/ac2c65)

2020

Chen, X. , Kontar, E. P. , Chrysaphi, N. , Jeffrey, N. L.S. , Gordovskyy, M., Yan, Y. and Tan, B. (2020) Subsecond time evolution of type III solar radio burst sources at fundamental and harmonic frequencies. Astrophysical Journal, 905(1), 43. (doi: 10.3847/1538-4357/abc24e)

2019

Kontar, E. P. , Chen, X. , Chrysaphi, N. , Jeffrey, N. L.S. , Emslie, A. G., Krupar, V., Maksimovic, M., Gordovskyy, M. and Browning, P. K. (2019) Anisotropic radio-wave scattering and the interpretation of solar radio emission observations. Astrophysical Journal, 884(2), 122. (doi: 10.3847/1538-4357/ab40bb)

Jeffrey, N. L.S. , Kontar, E. P. and Fletcher, L. (2019) The role of energy diffusion in the deposition of energetic electron energy in solar and stellar flares. Astrophysical Journal, 880(2), 136. (doi: 10.3847/1538-4357/ab2764)

Aschwanden, M. J., Kontar, E. P. and Jeffrey, N. L.S. (2019) Global energetics of solar flares. VIII. The low-energy cutoff. Astrophysical Journal, 881(1), 1. (doi: 10.3847/1538-4357/ab2cd4)

Kontar, E. P. , Jeffrey, N. L.S. and Emslie, A. G. (2019) Determination of the total accelerated electron rate and power using solar flare hard X-ray spectra. Astrophysical Journal, 871(2), 225. (doi: 10.3847/1538-4357/aafad3)

2018

Jeffrey, N.L.S. , Fletcher, L. , Labrosse, N. and Simoes, P.J.A. (2018) The development of lower-atmosphere turbulence early in a solar flare. Science Advances, 4(12), eaav2794. (doi: 10.1126/sciadv.aav2794)

Kontar, E.P. , Motorina, G.G., Jeffrey, N.L.S. , Tsap, Y.T., Fleishman, G.D. and Stepanov, A.V. (2018) Frequency rising sub-THz emission from solar flare ribbons. Astronomy and Astrophysics, 620, A95. (doi: 10.1051/0004-6361/201834124)

Jeffrey, N. L.S. , Hahn, M., Savin, D. W. and Fletcher, L. (2018) Spectroscopic measurements of the ion velocity distribution at the base of the fast solar wind. Astrophysical Journal Letters, 856(1), L13. (doi: 10.3847/2041-8213/aab08c)

Kontar, E.P. , Yu, S., Kuznetsov, A.A., Emslie, A.G., Alcock, B. , Jeffrey, N.L.S. , Melnik, V.N., Bian, N.H. and Subramanian, P. (2018) Publisher Correction: Imaging spectroscopy of solar radio burst fine structures. Nature Communications, 9, 146. (doi: 10.1038/s41467-017-02464-6) (PMID:29323123) (PMCID:PMC5765264)

2017

Kontar, E.P. , Yu, S., Kuznetsov, A.A., Emslie, A.G., Alcock, B. , Jeffrey, N.L.S. , Melnik, V.N., Bian, N.H. and Subramanian, P. (2017) Imaging spectroscopy of solar radio burst fine structures. Nature Communications, 8, 1515. (doi: 10.1038/s41467-017-01307-8) (PMID:29142220) (PMCID:PMC5688146)

Casadei, D., Jeffrey, N. L.S. and Kontar, E. P. (2017) Measuring X-ray anisotropy in solar flares. Prospective stereoscopic capabilities of STIX and MiSolFA. Astronomy and Astrophysics, 606, A2. (doi: 10.1051/0004-6361/201730629)

Wang, J., Simoes, P.J.A. , Jeffrey, N.L.S. , Fletcher, L. , Wright, P.J. and Hannah, I.G. (2017) Observations of reconnection flows in a flare on the solar disk. Astrophysical Journal Letters, 847(1), L1. (doi: 10.3847/2041-8213/aa8904)

Kontar, E.P. , Perez, J.E., Harra, L.K., Kuznetsov, A.A., Emslie, A.G., Jeffrey, N.L.S. , Bian, N.H. and Dennis, B.R. (2017) Turbulent kinetic energy in the energy balance of a solar flare. Physical Review Letters, 118(15), 155101. (doi: 10.1103/PhysRevLett.118.155101) (PMID:28452537)

Jeffrey, N. L.S. , Fletcher, L. and Labrosse, N. (2017) Non-gaussian velocity distributions in solar flares from extreme ultraviolet lines: a possible diagnostic of ion acceleration. Astrophysical Journal, 836(1), (doi: 10.3847/1538-4357/836/1/35)

2016

Jeffrey, N. L.S. , Fletcher, L. and Labrosse, N. (2016) First evidence of non-Gaussian solar flare EUV spectral line profiles and accelerated non-thermal ion motion. Astronomy and Astrophysics, 590, A99. (doi: 10.1051/0004-6361/201527986)

Li, S., Yan, Y. H., Wang, W., Chen, Z. J., Liu, D. H., Zhang, F. S. and Jeffrey, N. (2016) A new impedance matching method for an ultra-wide band and dual circularly polarised feed. Publications of the Astronomical Society of Australia, 33, e061. (doi: 10.1017/pasa.2016.51)

2015

Jeffrey, N. L. S. , Kontar, E. P. and Dennis, B. R. (2015) High-temperature differential emission measure and altitude variations in the temperature and density of solar flare coronal X-ray sources. Astronomy and Astrophysics, 584, A89. (doi: 10.1051/0004-6361/201526665)

Kontar, E. P. , Jeffrey, N. L. S. , Emslie, A. G. and Bian, N. H. (2015) Collisional relaxation of electrons in a warm plasma and accelerated nonthermal electron spectra in solar flares. Astrophysical Journal, 809(1), 35. (doi: 10.1088/0004-637X/809/1/35)

Jeffrey, N. L. S. , Kontar, E. P. , Emslie, A. G. and Bian, N. H. (2015) The collisional relaxation of electrons in hot flaring plasma and inferring the properties of solar flare accelerated electrons from X-ray observations. In: 14th Annual International Astrophysics Conference: Linear and Nonlinear Particle Energization throughout the Heliosphere and Beyond, Tampa, FL, USA, 20-24 Apr 2015, (doi: 10.1088/1742-6596/642/1/012013)

2014

Jeffrey, N. L.S. , Kontar, E. P. , Bian, N. H. and Emslie, A. G. (2014) On the variation of solar flare coronal X-ray source sizes with energy. Astrophysical Journal, 787(1), 86. (doi: 10.1088/0004-637X/787/1/86)

2013

Jeffrey, N.L.S. and Kontar, E.P. (2013) Temporal variations of x-ray solar flare loops: length, corpulence, position, temperature, plasma pressure, and spectra. Astrophysical Journal, 766(2), Art. 75. (doi: 10.1088/0004-637X/766/2/75)

2011

Jeffrey, N.L.S. and Kontar, E.P. (2011) Spatially resolved hard X-ray polarization in solar flares: effects of Compton scattering and bremsstrahlung. Astronomy and Astrophysics, 536, (doi: 10.1051/0004-6361/201117987)

Krucker, S., Hudson, H.S. , Jeffrey, N.L.S. , Battaglia, M., Kontar, E.P. , Benz, A.O., Csillaghy, A. and Lin, R.P. (2011) High-resolution imaging of solar flare ribbons and its implication on the thick-target beam model. Astrophysical Journal, 739(2), p. 96. (doi: 10.1088/0004-637X/739/2/96)

2010

Kontar, E.P. , Hannah, I.G. , Jeffrey, N.L.S. and Battaglia, M. (2010) The sub-arcsecond hard x-ray structure of loop footpoints in a solar flare. Astrophysical Journal, 717(1), pp. 250-256. (doi: 10.1088/0004-637X/717/1/250)

Kontar, E.P. and Jeffrey, N.L.S. (2010) Positions and sizes of X-ray solar flare sources. Astronomy and Astrophysics, 513, (doi: 10.1051/0004-6361/201014066)

Articles

Stores, M., Jeffrey, N. L.S. and Kontar, E. P. (2021) The spatial and temporal variations of turbulence in a solar flare. Astrophysical Journal, 923(1), 40. (doi: 10.3847/1538-4357/ac2c65)

Chen, X. , Kontar, E. P. , Chrysaphi, N. , Jeffrey, N. L.S. , Gordovskyy, M., Yan, Y. and Tan, B. (2020) Subsecond time evolution of type III solar radio burst sources at fundamental and harmonic frequencies. Astrophysical Journal, 905(1), 43. (doi: 10.3847/1538-4357/abc24e)

Kontar, E. P. , Chen, X. , Chrysaphi, N. , Jeffrey, N. L.S. , Emslie, A. G., Krupar, V., Maksimovic, M., Gordovskyy, M. and Browning, P. K. (2019) Anisotropic radio-wave scattering and the interpretation of solar radio emission observations. Astrophysical Journal, 884(2), 122. (doi: 10.3847/1538-4357/ab40bb)

Jeffrey, N. L.S. , Kontar, E. P. and Fletcher, L. (2019) The role of energy diffusion in the deposition of energetic electron energy in solar and stellar flares. Astrophysical Journal, 880(2), 136. (doi: 10.3847/1538-4357/ab2764)

Aschwanden, M. J., Kontar, E. P. and Jeffrey, N. L.S. (2019) Global energetics of solar flares. VIII. The low-energy cutoff. Astrophysical Journal, 881(1), 1. (doi: 10.3847/1538-4357/ab2cd4)

Kontar, E. P. , Jeffrey, N. L.S. and Emslie, A. G. (2019) Determination of the total accelerated electron rate and power using solar flare hard X-ray spectra. Astrophysical Journal, 871(2), 225. (doi: 10.3847/1538-4357/aafad3)

Jeffrey, N.L.S. , Fletcher, L. , Labrosse, N. and Simoes, P.J.A. (2018) The development of lower-atmosphere turbulence early in a solar flare. Science Advances, 4(12), eaav2794. (doi: 10.1126/sciadv.aav2794)

Kontar, E.P. , Motorina, G.G., Jeffrey, N.L.S. , Tsap, Y.T., Fleishman, G.D. and Stepanov, A.V. (2018) Frequency rising sub-THz emission from solar flare ribbons. Astronomy and Astrophysics, 620, A95. (doi: 10.1051/0004-6361/201834124)

Jeffrey, N. L.S. , Hahn, M., Savin, D. W. and Fletcher, L. (2018) Spectroscopic measurements of the ion velocity distribution at the base of the fast solar wind. Astrophysical Journal Letters, 856(1), L13. (doi: 10.3847/2041-8213/aab08c)

Kontar, E.P. , Yu, S., Kuznetsov, A.A., Emslie, A.G., Alcock, B. , Jeffrey, N.L.S. , Melnik, V.N., Bian, N.H. and Subramanian, P. (2018) Publisher Correction: Imaging spectroscopy of solar radio burst fine structures. Nature Communications, 9, 146. (doi: 10.1038/s41467-017-02464-6) (PMID:29323123) (PMCID:PMC5765264)

Kontar, E.P. , Yu, S., Kuznetsov, A.A., Emslie, A.G., Alcock, B. , Jeffrey, N.L.S. , Melnik, V.N., Bian, N.H. and Subramanian, P. (2017) Imaging spectroscopy of solar radio burst fine structures. Nature Communications, 8, 1515. (doi: 10.1038/s41467-017-01307-8) (PMID:29142220) (PMCID:PMC5688146)

Casadei, D., Jeffrey, N. L.S. and Kontar, E. P. (2017) Measuring X-ray anisotropy in solar flares. Prospective stereoscopic capabilities of STIX and MiSolFA. Astronomy and Astrophysics, 606, A2. (doi: 10.1051/0004-6361/201730629)

Wang, J., Simoes, P.J.A. , Jeffrey, N.L.S. , Fletcher, L. , Wright, P.J. and Hannah, I.G. (2017) Observations of reconnection flows in a flare on the solar disk. Astrophysical Journal Letters, 847(1), L1. (doi: 10.3847/2041-8213/aa8904)

Kontar, E.P. , Perez, J.E., Harra, L.K., Kuznetsov, A.A., Emslie, A.G., Jeffrey, N.L.S. , Bian, N.H. and Dennis, B.R. (2017) Turbulent kinetic energy in the energy balance of a solar flare. Physical Review Letters, 118(15), 155101. (doi: 10.1103/PhysRevLett.118.155101) (PMID:28452537)

Jeffrey, N. L.S. , Fletcher, L. and Labrosse, N. (2017) Non-gaussian velocity distributions in solar flares from extreme ultraviolet lines: a possible diagnostic of ion acceleration. Astrophysical Journal, 836(1), (doi: 10.3847/1538-4357/836/1/35)

Jeffrey, N. L.S. , Fletcher, L. and Labrosse, N. (2016) First evidence of non-Gaussian solar flare EUV spectral line profiles and accelerated non-thermal ion motion. Astronomy and Astrophysics, 590, A99. (doi: 10.1051/0004-6361/201527986)

Li, S., Yan, Y. H., Wang, W., Chen, Z. J., Liu, D. H., Zhang, F. S. and Jeffrey, N. (2016) A new impedance matching method for an ultra-wide band and dual circularly polarised feed. Publications of the Astronomical Society of Australia, 33, e061. (doi: 10.1017/pasa.2016.51)

Jeffrey, N. L. S. , Kontar, E. P. and Dennis, B. R. (2015) High-temperature differential emission measure and altitude variations in the temperature and density of solar flare coronal X-ray sources. Astronomy and Astrophysics, 584, A89. (doi: 10.1051/0004-6361/201526665)

Kontar, E. P. , Jeffrey, N. L. S. , Emslie, A. G. and Bian, N. H. (2015) Collisional relaxation of electrons in a warm plasma and accelerated nonthermal electron spectra in solar flares. Astrophysical Journal, 809(1), 35. (doi: 10.1088/0004-637X/809/1/35)

Jeffrey, N. L.S. , Kontar, E. P. , Bian, N. H. and Emslie, A. G. (2014) On the variation of solar flare coronal X-ray source sizes with energy. Astrophysical Journal, 787(1), 86. (doi: 10.1088/0004-637X/787/1/86)

Jeffrey, N.L.S. and Kontar, E.P. (2013) Temporal variations of x-ray solar flare loops: length, corpulence, position, temperature, plasma pressure, and spectra. Astrophysical Journal, 766(2), Art. 75. (doi: 10.1088/0004-637X/766/2/75)

Jeffrey, N.L.S. and Kontar, E.P. (2011) Spatially resolved hard X-ray polarization in solar flares: effects of Compton scattering and bremsstrahlung. Astronomy and Astrophysics, 536, (doi: 10.1051/0004-6361/201117987)

Krucker, S., Hudson, H.S. , Jeffrey, N.L.S. , Battaglia, M., Kontar, E.P. , Benz, A.O., Csillaghy, A. and Lin, R.P. (2011) High-resolution imaging of solar flare ribbons and its implication on the thick-target beam model. Astrophysical Journal, 739(2), p. 96. (doi: 10.1088/0004-637X/739/2/96)

Kontar, E.P. , Hannah, I.G. , Jeffrey, N.L.S. and Battaglia, M. (2010) The sub-arcsecond hard x-ray structure of loop footpoints in a solar flare. Astrophysical Journal, 717(1), pp. 250-256. (doi: 10.1088/0004-637X/717/1/250)

Kontar, E.P. and Jeffrey, N.L.S. (2010) Positions and sizes of X-ray solar flare sources. Astronomy and Astrophysics, 513, (doi: 10.1051/0004-6361/201014066)

Conference Proceedings

Jeffrey, N. L. S. , Kontar, E. P. , Emslie, A. G. and Bian, N. H. (2015) The collisional relaxation of electrons in hot flaring plasma and inferring the properties of solar flare accelerated electrons from X-ray observations. In: 14th Annual International Astrophysics Conference: Linear and Nonlinear Particle Energization throughout the Heliosphere and Beyond, Tampa, FL, USA, 20-24 Apr 2015, (doi: 10.1088/1742-6596/642/1/012013)