Professor Lyndsay Fletcher

Professor of Astrophysics (Physics & Astronomy)

telephone: 01413305311
email: Lyndsay.Fletcher@glasgow.ac.uk

R618 Level 6, Physics & Astronomy, Kelvin Building, Glasgow G12 8QQ

Research interests

Personal webpage: http://www.astro.gla.ac.uk/?p=123

My research interests are in the field of solar coronal and flare physics. I work on the analysis of imaging and spectral data from solar space missions, such as RHESSI, Hinode and SDO, solar image processing, numerical simulation of fast particle transport in magnetised plasmas, and flare and active region magnetic field structure.

researcherID:

Publications

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Number of items: 157.

2024

Thoen Faber, J., Joshi, R., Rouppe van der Voort, L., Wedemeyer, S., Fletcher, L. , Aulanier, G. and Nóbrega-Siverio, D. (2024) High-resolution observational analysis of flare ribbon fine structures. Astronomy and Astrophysics, 693, A8. (doi: 10.1051/0004-6361/202452370)

华东 Chen 陈, H., Fletcher, L. , 桂萍 Zhou 周, G., 鑫 Cheng 程, X., 亚 Wang 汪, Y., Mulay, S. , 瑞生 Zheng 郑, R., 素丽 Ma 马, S. and 小凡 Zhang 张, X. (2024) Simultaneous eruption and shrinkage of preexisting flare loops during a subsequent solar eruption. Astrophysical Journal, 976(2), 207. (doi: 10.3847/1538-4357/ad8c25)

Aslam, O.P.M. , Mactaggart, D. , Williams, T., Fletcher, L. and Romano, P. (2024) Photospheric signatures of CME onset. Monthly Notices of the Royal Astronomical Society, 534(1), pp. 444-454. (doi: 10.1093/mnras/stae2110)

Fletcher, L. (2024) Solar flare spectroscopy. Annual Review of Astronomy and Astrophysics, 62(1), pp. 437-474. (doi: 10.1146/annurev-astro-052920-010547)

Chitta, L.P., Hannah, I.G. , Fletcher, L., , Hudson, H.S. , Young, P.R., Krucker, S. and Peter, H. (2024) Hard X-rays from the deep solar atmosphere: an unusual UV burst with flare properties. Astronomy and Astrophysics, 688, L9. (doi: 10.1051/0004-6361/202450866)

Hudson, H. S. , Cliver, E. W., Fletcher, L. , Diver, D. A. , Gallagher, P. T., Li, Y., Osborne, C. M.J., Stark, C. and Su, Y. (2024) An impulsive geomagnetic effect from an early-impulsive flare. Monthly Notices of the Royal Astronomical Society, 532(3), pp. 3120-3125. (doi: 10.1093/mnras/stae1720)

Simões, P. J.A. , Fletcher, L. , Hudson, H. S. , Kerr, G. S., Penn, M. and Lopez, K. F. (2024) Precise timing of solar flare footpoint sources from mid-infrared observations. Monthly Notices of the Royal Astronomical Society, 532(1), pp. 705-718. (doi: 10.1093/mnras/stae1511)

Wang, Y., Fletcher, L. , Mulay, S. , Ji, H. and Cao, W. (2024) Enhanced three-minute oscillation above a sunspot during a solar flare. Astrophysical Journal, 961(2), 231. (doi: 10.3847/1538-4357/ad10a9)

Simões, P. J.A., Araújo, A., Válio, A. and Fletcher, L. (2024) Hydrogen recombination continuum as the radiative model for stellar optical flares. Monthly Notices of the Royal Astronomical Society, 528(2), pp. 2562-2567. (doi: 10.1093/mnras/stae186)

Millar, D. C.L., Fletcher, L. and Joshi, J. (2024) Intensity and velocity oscillations in a flaring active region. Monthly Notices of the Royal Astronomical Society, 527(3), pp. 5916-5928. (doi: 10.1093/mnras/stad3386)

2023

Reid, H. A.S. et al. (2023) The Solar Particle Acceleration Radiation and Kinetics (SPARK) mission concept. Aerospace, 10(12), 1034. (doi: 10.3390/aerospace10121034)

Mulay, S. M. , Fletcher, L. , Hudson, H. and Labrosse, N. (2023) Behaviour of molecular hydrogen emission in three solar flares. Monthly Notices of the Royal Astronomical Society, 526(3), pp. 4755-4767. (doi: 10.1093/mnras/stad2853)

Félix da Silva, D., Hui, L., Simões, P. J. A., Valio, A., Costa, J. E. R., Hudson, H. S. , Fletcher, L. , Hayes, L. A. and Hannah, I. G. (2023) Statistical analysis of the onset temperature of solar flares in 2010–2011. Monthly Notices of the Royal Astronomical Society, 525(3), pp. 4143-4148. (doi: 10.1093/mnras/stad2244)

Harra, L. et al. (2023) Firefly: the science case for a full view of the solar sphere. Bulletin of the American Astronomical Society, 55(3), (doi: 10.3847/25c2cfeb.ffa884ce)

Kerr, G. S. et al. (2023) Requirements for progress in understanding solar flare energy transport: the gradual phase. Bulletin of the American Astronomical Society, 55(3), (doi: 10.3847/25c2cfeb.fd373fef)

Kerr, G. S. et al. (2023) Requirements for progress in understanding solar flare energy transport: the impulsive phase. Bulletin of the American Astronomical Society, 55(3), (doi: 10.3847/25c2cfeb.701e4c96)

Carlsson, M., Fletcher, L. , Allred, J., Heinzel, P., Kašparová, J., Kowalski, A., Mathioudakis, M., Reid, A. and Simoes, P. J. A. (2023) The F-CHROMA grid of 1D RADYN flare models. Astronomy and Astrophysics, 673, A150. (doi: 10.1051/0004-6361/202346087)

2022

Matthews, S. A. et al. (2022) The high-energy Sun - probing the origins of particle acceleration on our nearest star. Experimental Astronomy, 54(2-3), pp. 335-360. (doi: 10.1007/s10686-021-09798-6)

Osborne, C. M. J. and Fletcher, L. (2022) Flare kernels may be smaller than you think: modelling the radiative response of chromospheric plasma adjacent to a solar flare. Monthly Notices of the Royal Astronomical Society, 516(4), pp. 6066-6074. (doi: 10.1093/mnras/stac2570)

Quintero Noda, C. et al. (2022) The European Solar Telescope. Astronomy and Astrophysics, 666, A21. (doi: 10.1051/0004-6361/202243867)

Hudson, H. S. , Mulay, S. M. , Fletcher, L. , Docherty, J., Fitzpatrick, J., Pike, E., Strong, M., Chamberlin, P. C. and Woods, T. N. (2022) Fast prograde coronal flows in solar active regions. Monthly Notices of the Royal Astronomical Society: Letters, 515(1), L84-L88. (doi: 10.1093/mnrasl/slac079)

Labrosse, N. , Rodger, A. S., Radziszewski, K., Rudawy, P., Antolin, P., Fletcher, L. , Levens, P. J., Peat, A. W., Schmieder, B. and Simões, P. J. A. (2022) First high resolution interferometric observation of a solar prominence with ALMA. Monthly Notices of the Royal Astronomical Society: Letters, 513(1), L30-L34. (doi: 10.1093/mnrasl/slac021)

Chen, H., Ma, S., Su, Y., Zhou, G., Priest, E., Shen, Y., Xia, C., Tu, W., Fletcher, L. and Zhang, J. (2022) Observations of a magnetic dip in a quiescent prominence foot. Research Square, (doi: 10.21203/rs.3.rs-1305619/v1)

Cheung, M. C. M. et al. (2022) Probing the physics of the solar atmosphere with the multi-slit solar explorer (MUSE). II. Flares and eruptions. Astrophysical Journal, 926(1), 53. (doi: 10.3847/1538-4357/ac4223)

2021

Osborne, C.M.J., Heinzel, P., Kasparova, J. and Fletcher, L. (2021) On the importance of Ca II photoionisation by the hydrogen Lyman transitions in solar flare models. Monthly Notices of the Royal Astronomical Society, 507(2), pp. 1972-1978. (doi: 10.1093/mnras/stab2156)

Mulay, S. M. and Fletcher, L. (2021) Evidence of chromospheric molecular hydrogen emission in a solar flare observed by the IRIS satellite. Monthly Notices of the Royal Astronomical Society, 504(2), pp. 2842-2852. (doi: 10.1093/mnras/stab367)

Armstrong, J. A. and Fletcher, L. (2021) A machine-learning approach to correcting atmospheric seeing in solar flare observations. Monthly Notices of the Royal Astronomical Society, 501(2), pp. 2647-2658. (doi: 10.1093/mnras/staa3742)

Hudson, H. S. , Simões, P. J.A. , Fletcher, L. , Hayes, L. A. and Hannah, I. G. (2021) Hot X-ray onsets of solar flares. Monthly Notices of the Royal Astronomical Society, 501(1), pp. 1273-1281. (doi: 10.1093/mnras/staa3664)

2020

Armstrong, J. A. , Osborne, C. M.J. and Fletcher, L. (2020) Deep learning for the Sun. Astronomy and Geophysics, 61(3), 3.34-3.39. (doi: 10.1093/astrogeo/ataa044)

Fletcher, L. , Labrosse, N. and MacKinnon, A. (2020) John Campbell Brown OBE (1947–2019). Astronomy and Geophysics, 61(2), 2.14. (doi: 10.1093/astrogeo/ataa019)

2019

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)

Armstrong, J. A. and Fletcher, L. (2019) Fast solar image classification using deep learning and its importance for automation in solar physics. Solar Physics, 294, 80. (doi: 10.1007/s11207-019-1473-z)

MacTaggart, D. and Fletcher, L. (2019) The plasmoid instability in a confined solar flare. Monthly Notices of the Royal Astronomical Society, 486(1), L96-L100. (doi: 10.1093/mnrasl/slz068)

Rodger, A. S., Labrosse, N. , Wedemeyer, S., Szydlarski, M., Simões, P. J.A. and Fletcher, L. (2019) First spectral analysis of a solar plasma eruption using ALMA. Astrophysical Journal, 875(2), 163. (doi: 10.3847/1538-4357/aafdfb)

Osborne, C. M.J., Armstrong, J. A. and Fletcher, L. (2019) RADYNVERSION: Learning to invert a solar flare atmosphere with invertible neural networks. Astrophysical Journal, 873, 128. (doi: 10.3847/1538-4357/ab07b4)

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)

Brown, S. A., Fletcher, L. , Kerr, G. S., Labrosse, N. , Kowalski, A. F. and De La Cruz Rodríguez, J. (2018) Modeling of the hydrogen Lyman lines in solar flares. Astrophysical Journal, 862(1), 59. (doi: 10.3847/1538-4357/aacc29)

Wang, J., Simoes, P.J.A. and Fletcher, L. (2018) Unambiguous evidence of coronal implosions during solar eruptions and flares. Astrophysical Journal, 859(1), 25. (doi: 10.3847/1538-4357/aabc0e)

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)

2017

Capparelli, V., Zuccarello, F., Romano, P., Simões, P. J.A. , Fletcher, L. , Kuridze, D., Mathioudakis, M., Keys, P. H., Cauzzi, G. and Carlsson, M. (2017) Hα and Hβ emission in a C3.3 solar flare: comparison between observations and simulations. Astrophysical Journal, 850(1), 36. (doi: 10.3847/1538-4357/aa9187)

Levens, P.J., Labrosse, N. , Schmieder, B., López Ariste, A. and Fletcher, L. (2017) Comparing UV/EUV line parameters and magnetic field in a quiescent prominence with tornadoes. Astronomy and Astrophysics, 607, A16. (doi: 10.1051/0004-6361/201730808)

Pascoe, D.J., Russell, A.J.B., Anfinogentov, S.A., Simões, P.J.A. , Goddard, C.R., Nakariakov, V.M. and Fletcher, L. (2017) Seismology of contracting and expanding coronal loops using damping of kink oscillations by mode coupling. Astronomy and Astrophysics, 607, A8. (doi: 10.1051/0004-6361/201730915)

Birn, J., Battaglia, M., Fletcher, L. , Hesse, M. and Neukirch, T. (2017) Can substorm particle acceleration be applied to solar flares? Astrophysical Journal, 848(2), 116. (doi: 10.3847/1538-4357/aa8ad4)

Milligan, R. O. , Fleck, B., Ireland, J., Fletcher, L. and Dennis, B. R. (2017) Detection of three-minute oscillations in full-disk Lyα emission during a solar flare. Astrophysical Journal Letters, 848(1), L8. (doi: 10.3847/2041-8213/aa8f3a/meta)

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)

Simões, P. J.A. , Kerr, G. S., Fletcher, L. , Hudson, H. S. , Giménez de Castro, C. G. and Penn, M. (2017) Formation of the thermal infrared continuum in solar flares. Astronomy and Astrophysics, 605, A125. (doi: 10.1051/0004-6361/201730856)

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

Brown, S. A., Fletcher, L. and Labrosse, N. (2016) Doppler speeds of the hydrogen Lyman lines in solar flares from EVE. Astronomy and Astrophysics, 596, A51. (doi: 10.1051/0004-6361/201628390)

Wang, J., Simões, P.J.A. , Fletcher, L. , Thalmann, J.K., Hudson, H.S. and Hannah, I.G. (2016) Arcade implosion caused by a filament eruption in a flare wang. Astrophysical Journal, 833(2), 221. (doi: 10.3847/1538-4357/833/2/221)

Kerr, G., Fletcher, L. , Russell, A. J.B. and Allred, J. C. (2016) Simulations of the Mg II k and Ca II 8542 lines from an Alfvén wave-heated flare chromosphere. Astrophysical Journal, 827(2), 101. (doi: 10.3847/0004-637X/827/2/101)

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)

Simoes, P. , Fletcher, L. , Labrosse, N. and Kerr, G. (2016) Observations and Modelling of Helium Lines in Solar Flares. In: Coimbra Solar Physics Meeting 2015: Ground-based Solar Observations in the Space Instrumentation Era, Coimbra, Portugal, 5-9 Oct 2015, p. 197. ISBN 9781583818923

2015

Graham, D. R., Fletcher, L. and Labrosse, N. (2015) Determining energy balance in the flaring chromosphere from oxygen V line ratios. Astronomy and Astrophysics, 584, A6. (doi: 10.1051/0004-6361/201425348)

Simoes, P. J.A. , Graham, D. R. and Fletcher, L. (2015) Impulsive heating of solar flare ribbons above 10 MK. Solar Physics, 290(12), pp. 3573-3591. (doi: 10.1007/s11207-015-0709-9)

Simoes, P. J.A. , Hudson, H. S. and Fletcher, L. (2015) Soft X-ray pulsations in solar flares. Solar Physics, 290(12), pp. 3625-3639. (doi: 10.1007/s11207-015-0691-2)

Kuridze, D. et al. (2015) Hα line profile asymmetries and the chromospheric flare velocity field. Astrophysical Journal, 813(2), 125. (doi: 10.1088/0004-637X/813/2/125)

Kerr, G., Simoes, P. , Qiu, J. and Fletcher, L. (2015) IRIS observations of the Mg II h and k lines during a solar flare. Astronomy and Astrophysics, 582, A50. (doi: 10.1051/0004-6361/201526128)

Levens, P.J., Labrosse, N. , Fletcher, L. and Schmieder, B. (2015) A solar tornado observed by EIS: plasma diagnostics. Astronomy and Astrophysics, 582, A27. (doi: 10.1051/0004-6361/201425586)

Russell, A. J. B., Simoes, P. J. A. and Fletcher, L. (2015) A unified view of coronal loop contraction and oscillation in flares. Astronomy and Astrophysics, 581, A8. (doi: 10.1051/0004-6361/201525746)

Simoes, P.J.A. , Graham, D.R. and Fletcher, L. (2015) Direct observation of the energy release site in a solar flare by SDO/AIA, Hinode/EIS and RHESSI. Astronomy and Astrophysics, 577, A68. (doi: 10.1051/0004-6361/201424795)

Kowalski, A. F., Cauzzi, G. and Fletcher, L. (2015) Optical spectral observations of a flickering white-light kernel in a C1 solar flare. Astrophysical Journal, 798(2), 107. (doi: 10.1088/0004-637X/798/2/107)

2014

Pitkin, M. , Williams, D., Fletcher, L. and Grant, S.D.T. (2014) A Bayesian method for detecting stellar flares. Monthly Notices of the Royal Astronomical Society, 445(3), pp. 2268-2284. (doi: 10.1093/mnras/stu1889)

Judge, P. G., Kleint, L., Donea, A., Dalda, A. S. and Fletcher, L. (2014) On the origin of a sunquake during the 2014 March 29 X1 flare. Astrophysical Journal, 796(2), p. 85. (doi: 10.1088/0004-637X/796/2/85)

Milligan, R. O., Kerr, G. S.,, Dennis, B. R., Hudson, H. S. , Fletcher, L. , Allred, J. C., Chamberlin, P. C., Ireland, J., Mathioudakis, M. and Keenan, F. P. (2014) The radiated energy budget of chromospheric plasma in a major solar flare deduced from multi-wavelength observations. Astrophysical Journal, 793(2), p. 70. (doi: 10.1088/0004-637X/793/2/70)

Sharykin, I., Liu, S. and Fletcher, L. (2014) Onset of electron acceleration in a flare loop. Astrophysical Journal, 793(1), pp. 25-34. (doi: 10.1088/0004-637X/793/1/25)

Battaglia, M., Fletcher, L. and Simões, P. J. A. (2014) Where is the chromospheric response to conductive energy input from a hot pre-flare coronal loop? Astrophysical Journal, 789(1), p. 47. (doi: 10.1088/0004-637X/789/1/47)

Kuijpers, J., Frey, H. and Fletcher, L. (2014) Electric current circuits in astrophysics. Space Science Reviews, 188(1), pp. 3-57. (doi: 10.1007/s11214-014-0041-y)

Fletcher, L. , Cargill, P. J., Antiochos, S. K. and Gudiksen, B. V. (2014) Structures in the outer solar atmosphere. Space Science Reviews, 188(1-4), pp. 211-249. (doi: 10.1007/s11214-014-0111-1)

Hudson, H. , Fletcher, L. and McTiernan, J. (2014) Cycle 23 variation in solar flare productivity. Solar Physics, 289(4), pp. 1341-1347. (doi: 10.1007/s11207-013-0384-7)

Kerr, G.S. and Fletcher, L. (2014) Physical properties of White-Light Sources in the 2011 Feb 15 Solar Flare. Astrophysical Journal, 783(2), Art. 98. (doi: 10.1088/0004-637X/783/2/98)

2013

Simões, P.J.A. , Fletcher, L. , Hudson, H.S. and Russell, A.J.B. (2013) Implosion of coronal loops during the impulsive phase of a solar flare. Astrophysical Journal, 777(2), Art. 152. (doi: 10.1088/0004-637X/777/2/152)

Liu, S., Li, Y. and Fletcher, L. (2013) Impulsive thermal x-ray emission from a low-lying coronal loop. Astrophysical Journal, 769(2), p. 135. (doi: 10.1088/0004-637X/769/2/135)

Graham, D.R., Hannah, I.G. , Fletcher, L. and Milligan, R.O. (2013) The emission measure distribution of impulsive phase flare footpoints. Astrophysical Journal, 767(1), Art. 83. (doi: 10.1088/0004-637X/767/1/83)

Russell, A.J.B. and Fletcher, L. (2013) Propagation of alfvénic waves from corona to chromosphere and consequences for solar flares. Astrophysical Journal, 765(2), Art. 81. (doi: 10.1088/0004-637X/765/2/81)

Fletcher, L. , Hannah, I.G. , Hudson, H.S. and Innes, D.E. (2013) Flare ribbon energetics in the early phase of an SDO flare. Astrophysical Journal, 771(2), pp. 1-3. (doi: 10.1088/0004-637X/771/2/104)

2012

Fischer, C.E., Keller, C.U., Snik, F., Fletcher, L. and Socas-Navarro, H. (2012) Unusual stokes v profiles during flaring activity of a delta sunspot. Astronomy and Astrophysics, 547, A34. (doi: 10.1051/0004-6361/201219272)

Jain, R., Tripathy, S.C., Watson, F.T., Fletcher, L. , Jain, K. and Hill, F. (2012) Variation of solar oscillation frequencies in solar cycle 23 and their relation to sunspot area and number. Astronomy and Astrophysics, 545, A73. (doi: 10.1051/0004-6361/201219876)

Battaglia, M., Kontar, E.P. , Fletcher, L. and MacKinnon, A.L. (2012) Numerical simulations of chromospheric hard X-ray source sizesin solar flares. Astrophysical Journal, 752(1), (doi: 10.1088/0004-637X/752/1/4)

Innes, D.E., Cameron, R.H., Fletcher, L. , Inhester, B. and Solanki, S.K. (2012) Break up of returning plasma after the 7 June 2011 filament eruption by Rayleigh-Taylor instabilities. Astronomy and Astrophysics, 540, L10. (doi: 10.1051/0004-6361/201118530)

Matthews, S.A. et al. (2012) Solar particle acceleration radiation and kinetics (SPARK). Experimental Astronomy, 33(2-3), pp. 237-269. (doi: 10.1007/s10686-011-9260-3)

Hudson, H.S., Fletcher, L. , Fisher, G.H., Abbett, W.P. and Russell, A. (2012) Momentum distribution in solar flare processes. Solar Physics, 277(1), pp. 77-88. (doi: 10.1007/s11207-011-9836-0)

Milligan, R.O., Chamberlin, P.C., Hudson, H.S., Woods, T.N., Mathioudakis, M., Fletcher, L. , Kowalski, A.F. and Keenan, F.P. (2012) Observations of enhanced extreme ultraviolet continua during an x-class solar flare usingsdo/eve. Astrophysical Journal Letters, 748(1), L14. (doi: 10.1088/2041-8205/748/1/L14)

Rubio da Costa, F., Zuccarello, F., Fletcher, L. , Romano, P. and Labrosse, N. (2012) The role of filament activation in a solar eruption. Astronomy and Astrophysics, 539, A27. (doi: 10.1051/0004-6361/201116895)

Fletcher, L. and Simoes, P. J. A. (2012) The impulsive phase in solar flares: recent multi-wavelength results and their implications for microwave modeling and observations. In: Solar Physics with Radio Observations - Twenty Years of Nobeyama Radioheliograph and Beyond, Nagoya University, Aichi, Japan, 20-23 Nov 2012,

Hudson, H.S. , Fletcher, L. , MacKinnon, A.L. and Woods, T.N. (2012) Charge-exchange limits on low-energy α-particle fluxes in solar flares. Astrophysical Journal, 752(2), p. 84. (doi: 10.1088/0004-637X/752/2/84)

2011

Fletcher, L. et al. (2011) An observational overview of solar flares. Space Science Reviews, 159(1-4), pp. 19-106. (doi: 10.1007/s11214-010-9701-8)

Watson, F., Fletcher, L. and Marshall, S. (2011) Evolution of sunspot properties during solar cycle 23. Astronomy and Astrophysics, 533, A14. (doi: 10.1051/0004-6361/201116655)

Zharkova, V.V. et al. (2011) Recent advances in understanding particle acceleration processes in solar flares. Space Science Reviews, 159(1-4), pp. 357-420. (doi: 10.1007/s11214-011-9803-y)

Graham, D.R., Fletcher, L. and Hannah, I.G. (2011) Hinode/EIS plasma diagnostics in the flaring solar chromosphere. Astronomy and Astrophysics, 532, A27. (doi: 10.1051/0004-6361/201015416)

Guo, J., Liu, S., Fletcher, L. and Kontar, E.P. (2011) Relationship between hard and soft X-ray emission components of a solar flare. Astrophysical Journal, 728(1), (doi: 10.1088/0004-637X/728/1/4)

Hudson, H. S. , Fletcher, L. , MacKinnon, A. and Woods, T. N. (2011) Non-Observation of the He II 304 A Charge-Exchange Continuum in Major Solar Flares. In: American Geophysical Union, Fall Meeting 2011, San Francisco, CA, USA, 5-9 Dec 2011,

Hudson, H.S., Woods, T.N., Chamberlin, P.C., Fletcher, L. , Zanna, G.D., Labrosse, N. and Graham, D. (2011) The EVE Doppler sensitivity and flare observations. Solar Physics, 273(1), pp. 69-80. (doi: 10.1007/s11207-011-9862-y)

2010

Potts, H., Hudson, H.S., Fletcher, L. and Diver, D.A. (2010) The optical depth of white-light flare continuum. Astrophysical Journal, 722(2), pp. 1514-1521. (doi: 10.1088/0004-637X/722/2/1514)

Rubio de Costa, F., Zuccarello, F., Labrosse, N. , Fletcher, L. , Prosecký, T. and Kašparová, J. (2010) Solar flares: observations vs simulations. Proceedings of the International Astronomical Union, 6(S274), pp. 182-184. (doi: 10.1017/S1743921311006880)

Foullon, C., Fletcher, L. , Hannah, I.G. , Verwichte, E., Cecconi, B., Nakariakov, V.M., Phillips, K.J.H. and Tan, B.L. (2010) From large-scale loops to the sites of dense flaring loops: preferential conditions for long-period pulsations in solar flares. Astrophysical Journal, 719(1), pp. 151-165. (doi: 10.1088/0004-637X/719/1/151)

Liu, S.M., Han, F.R. and Fletcher, L. (2010) Elementary energy release events in flaring loops: effects of chromospheric evaporation on x-rays. Astrophysical Journal, 709(1), pp. 58-66. (doi: 10.1088/0004-637X/709/1/58)

Fan, Z.H., Liu, S., Yuan, Q. and Fletcher, L. (2010) Lepton models for TeV emission from SNR RX J1713.7-3946. Astronomy and Astrophysics, 517(L4), (doi: 10.1051/0004-6361/201015169)

Gill, C., Fletcher, L. and Marshall, S. (2010) Using Active Contours for Semi-Automated Tracking of UV and EUV Solar Flare Ribbons. Solar Physics, 262(2), pp. 355-371. (doi: 10.1007/s11207-010-9508-5)

2009

Rubio de Costa, F., Fletcher, L. , Labrosse, N. and Zuccarello, F. (2009) Observations of a solar flare and filament eruption in Lyman α and X-rays. Astronomy and Astrophysics, 507(2), pp. 1005-1014. (doi: 10.1051/0004-6361/200912651)

Liu, S.M. and Fletcher, L. (2009) Elementary energy release events in solar flares. Astrophysical Journal Letters, 701(1), L34-L38. (doi: 10.1088/0004-637X/701/1/L34)

Romano, P., Zuccarello, F., Fletcher, L. , Rubio da Costa, F., Bain, H. and Contarino, L. (2009) Evolution of an eruptive flare loop system. Astronomy and Astrophysics, 498(3), pp. 901-907. (doi: 10.1051/0004-6361/200811309)

Bain, H.M. and Fletcher, L. (2009) Hard X-ray emission from a flare-related jet. Astronomy and Astrophysics, 508(3), pp. 1443-1452. (doi: 10.1051/0004-6361/200911876)

Battaglia, M., Fletcher, L. and Benz, A.O. (2009) Observations of conduction driven evaporation in the early rise phase of solar flares. Astronomy and Astrophysics, 498(3), pp. 891-900. (doi: 10.1051/0004-6361/200811196)

Birn, J., Fletcher, L., Hesse, M. and Neukirch, T. (2009) Energy Release And Transfer In Solar Flares: Simulations Of Three-Dimensional Reconnection. Astrophysical Journal, 695(2), pp. 1151-1162. (doi: 10.1088/0004-637X/695/2/1151)

Fletcher, L. (2009) Ultra-violet footpoints as tracers of coronal magnetic connectivity and restructuring during a solar flare. Astronomy and Astrophysics, 493(1), pp. 241-250. (doi: 10.1051/0004-6361:20077972)

Hudson, H. and Fletcher, L. (2009) Flares and the chromosphere. Earth Planets and Space, 61(5), pp. 577-580.

McClements, K. and Fletcher, L. (2009) Inertial Alfven Wave Acceleration Of Solar Flare Electrons. Astrophysical Journal, 693(2), pp. 1494-1499. (doi: 10.1088/0004-637X/693/2/1494)

Tripathi, D., Gibson, S.E., Qiu, J., Fletcher, L. , Liu, R., Gilbert, H. and Mason, H.E. (2009) Partially-erupting prominences: a comparison between observations and model-predicted observables. Astronomy and Astrophysics, 498(1), pp. 295-305. (doi: 10.1051/0004-6361/200809801)

Watson, F., Fletcher, L., Dalla, S. and Marshall, S. (2009) Modelling the longitudinal asymmetry in sunspot emergence: the role of the wilson depression. Solar Physics, 260(1), pp. 5-19. (doi: 10.1007/s11207-009-9420-z)

2008

Dalla, S., Fletcher, L. and Walton, N.A. (2008) Invisible sunspots and rate of solar magnetic flux emergence. Astronomy and Astrophysics, 479(1), L1-L4. (doi: 10.1051/0004-6361:20078800)

Fletcher, L. and Hudson, H. (2008) Impulsive phase flare energy transport by large-scale Alfven waves and the electron acceleration problem. Astrophysical Journal, 675(2), pp. 1645-1655. (doi: 10.1086/527044)

Krucker, S. et al. (2008) Hard X-ray emission from the solar corona. Astronomy and Astrophysics Review, 16(3-4), pp. 155-208. (doi: 10.1007/s00159-008-0014-9)

Mckay, R.J., McClements, K.G., Thyagaraja, A. and Fletcher, L. (2008) Test-particle simulations of collisional impurity transport in rotating spherical tokamak plasmas. Plasma Physics and Controlled Fusion, 50(6), 065017. (doi: 10.1088/0741-3335/50/6/065017)

2007

Khan, J.I., Bain, H.M. and Fletcher, L. (2007) The relative timing of supra-arcade downflows in solar flares. Astronomy and Astrophysics, 475(1), pp. 333-340. (doi: 10.1051/0004-6361:20077894)

Dalla, S., Fletcher, L. and Walton, N.A. (2007) Flare productivity of newly-emerged paired and isolated solar active regions. Astronomy and Astrophysics, 468(3), pp. 1103-1108. (doi: 10.1051/0004-6361:20077177)

Bone, L., Brown, J.C., Fletcher, L. , Veronig, A. and White, S. (2007) Birth and evolution of a dense coronal loop in a complex flare region. Astronomy and Astrophysics, 466(1), pp. 339-346. (doi: 10.1051/0004-6361:20065129)

McKay, R.J., McClements, K.G. and Fletcher, L. (2007) Fast Alfven wave heating and acceleration of ions in a nonuniform magnetoplasma. Astrophysical Journal, 658(1), pp. 631-642. (doi: 10.1086/511299)

Fletcher, L. , Hannah, I.G. , Hudson, H.S. and Metcalf, T.R. (2007) A TRACE white light and RHESSI hard X-ray study of flare energetics. Astrophysical Journal, 656(2), pp. 1187-1196. (doi: 10.1086/510446)

2006

Marshall, S., Fletcher, L. and Hough, K. (2006) Optimal filtering of solar images using soft morphological processing techniques. Astronomy and Astrophysics, 457(2), pp. 729-736. (doi: 10.1051/0004-6361:20064852)

Khan, J.I., Fletcher, L. and Nitta, N.V. (2006) Observations of simultaneous coronal loop shrinkage and expansion during the decay phase of a solar flare. Astronomy and Astrophysics, 453(1), pp. 335-339. (doi: 10.1051/0004-6361:20054604)

Hannah, I.G. and Fletcher, L. (2006) Comparison of the energy spectra and number fluxes from a simple flare model to observations. Solar Physics, 236, pp. 59-74. (doi: 10.1007/s11207-006-0139-9)

2005

Foullon, C., Verwichte, E., Nakariakov, V.M. and Fletcher, L. (2005) X-ray quasi-periodic pulsations in solar flares as magnetohydrodynamic oscillations. Astronomy and Astrophysics, 440(2), L59-L62. (doi: 10.1051/0004-6361:200500169)

Harra, L.K., Demoulin, P., Mandrini, C.H., Matthews, S.A., van Driel-Gesztelyi, L., Culhane, J.L. and Fletcher, L. (2005) Flows in the solar atmosphere due to the eruptions on the 15th July, 2002. Astronomy and Astrophysics, 438(3), pp. 1099-1106. (doi: 10.1051/0004-6361:20052965)

Diver, D.A., Fletcher, L. and Potts, H.E. (2005) Fip enhancement by Alfven ionization. Solar Physics, 227(2), pp. 207-215. (doi: 10.1007/s11207-005-2447-x)

Hamilton, B., Fletcher, L., McClements, K.G. and Thyagaraja, A. (2005) Electron acceleration at reconnecting X-points in solar flares. Astrophysical Journal, 625, pp. 496-505. (doi: 10.1086/430100)

Fletcher, L. (2005) The observational motivation for computational advances in solar flare physics. Space Science Reviews, 121, pp. 141-152. (doi: 10.1007/s11214-006-7181-7)

Hudson, H. , Fletcher, L. , Khan, J. I. and Kosugi, T. (2005) Overview of solar flares. In: Solar and Space Weather Radiophysics. Springer Netherlands, pp. 153-178. ISBN 9781402028137 (doi: 10.1007/1-4020-2814-8_8)

Ko, Y. et al. (2005) Multialtitude observations of a coronal jet during the third Whole Sun Month Campaign. Astrophysical Journal, 623, pp. 519-539.

2004

Fletcher, L. , Pollock, J.A. and Potts, H.E. (2004) Tracking of TRACE ultraviolet flare footpoints. Solar Physics, 222(2), pp. 279-298. (doi: 10.1023/B:SOLA.0000043580.89730.4d)

McClements, K.G., Thyagaraja, A., Ben Ayed, N. and Fletcher, L. (2004) Electron inertial effects on rapid energy redistribution at magnetic X-points. Astrophysical Journal, 609(1), pp. 423-438.

2003

Fletcher, L. and Warren, H.P. (2003) The energy release process in solar flares; constraints from TRACE observations. In: Klein, K.L. (ed.) Energy Conversion and Particle Acceleration in the Solar Corona. Series: Lecture notes in physics, 612. Springer, pp. 58-79. ISBN 9783540002758 (doi: 10.1007/3-540-36242-8_5)

Hamilton, B., McClements, K.G., Fletcher, L. and Thyagaraja, A. (2003) Field-guided proton acceleration at reconnecting X-points in flares. Solar Physics, 214(2), 339 -352. (doi: 10.1023/A:1024204928413)

2002

Gibson, S.E. et al. (2002) The structure and evolution of a sigmoidal active region. Astrophysical Journal, 574(2, pt.), 1021 -1038. (doi: 10.1086/341090)

Fletcher, L. and Hudson, H.S. (2002) Spectral and spatial variations of flare hard X-ray footpoints. Solar Physics, 210(1-2), 307 -321. (doi: 10.1023/A:1022479610710)

2001

Fletcher, L. and Hudson, H. (2001) The magnetic structure and generation of EUV flare ribbons. Solar Physics, 204(1-2), pp. 69-89. (doi: 10.1023/A:1014275821318)

Fletcher, L. , Metcalf, T.R., Alexander, D., Brown, D.S. and Ryder, L.A. (2001) Evidence for the flare trigger site and three-dimensional reconnection in multiwavelength observations of a solar flare. Astrophysical Journal, 554(1, pt.), 451 -463. (doi: 10.1086/321377)

Fletcher, L. , Fuentes, M.C.L., Mandrini, C.H., Schmieder, B., Demoulin, P., Mason, H.E., Young, P.R. and Nitta, N. (2001) A relationship between transition region brightenings, abundances, and magnetic topology. Solar Physics, 203(2), 255 -287. (doi: 10.1023/A:1013302317042)

2000

Schmieder, B., Deng, Y., Mandrini, C.H., Rudawy, P., Nitta, N., Mason, H., Fletcher, L. , Martens, P. and Brynildsen, N. (2000) Dynamics in restructuring active regions observed during SOHO/Yohkoh/GBO campaigns. Advances in Space Research, 25(9), 1879 -1882. (doi: 10.1016/S0273-1177(99)00600-6)

1999

Alexander, D. and Fletcher, L. (1999) High-resolution observations of plasma jets in the solar corona. Solar Physics, 190(1-22), pp. 167-184. (doi: 10.1023/A:1005213826793)

Berger, T.E., DePontieu, B., Fletcher, L. , Schrijver, C.J., Tarbell, T.E. and Title, A.M. (1999) What is moss? Solar Physics, 190(1-2), pp. 409-418. (doi: 10.1023/A:1005286503963)

Aschwanden, M.J., Fletcher, L. , Schrijver, C.J. and Alexander, D. (1999) Coronal loop oscillations observed with the transition region and coronal explorer. Astrophysical Journal, 520, pp. 880-894. (doi: 10.1086/307502)

Fletcher, L. and De Depontieu, B. (1999) Plasma diagnostics of transition region 'Moss' using SOHO/CDS and TRACE. Astrophysical Journal Letters, 520(2), L135-L138. (doi: 10.1086/312157)

Schrijver, C. J. et al. (1999) A new view of the solar outer atmosphere by the transition region and Coronal Explorer. Solar Physics, 187(2), pp. 261-302. (doi: 10.1023/A:1005194519642)

Aschwanden, M.J., Fletcher, L. , Sakao, T., Kosugi, T. and Hudson, H. (1999) Deconvolution of directly precipitating and trap-precipitating electrons in solar flare hard x-rays. III.Yohkoh hard x-ray telescope data analysis. Astrophysical Journal, 517(2), pp. 977-989. (doi: 10.1086/307230)

Aschwanden, M.J., Fletcher, L. , Sakao, T., Kosugi, T. and Hudson, H. (1999) Electron trapping and precipitation in asymmetric solar flare loops. In: International Astronomical Union; Highly energetic physical processes and mechanisms for emission from astrophysical plasmas, Bozeman, MT, USA, July 1999, pp. 375-376. ISBN 1583810382

1998

Fletcher, L. and Brown, J. (1998) Generation of solar Hα impact polarization by fragmented evaporative upflows. Astronomy and Astrophysics, 338, pp. 737-746.

Fletcher, L. and Martens, P. C.H. (1998) A model for hard X-ray emission from the top of flaring loops. Astrophysical Journal, 505(1), pp. 418-431. (doi: 10.1086/306137)

1997

Fletcher, L. (1997) Numerical simulations of coronal particle trapping. Astronomy and Astrophysics, 326, pp. 1259-1267.

Kuijpers, J.M.E., Fletcher, L. , Abada-Simon, M., Horne, K.D., Raadu, M.A., Ramsay, G. and Steeghs, D. (1997) Magnetic pumping in the cataclysmic variable AE Aquarii. Astronomy and Astrophysics, 322, pp. 242-255.

Fletcher, L. and Petkaki, P. (1997) Particle acceleration and transport in reconnecting plasmas. Solar Physics, 172(1-2), pp. 267-270. (doi: 10.1023/A:1004992228306)

1996

Kuijpers, L. and Fletcher, L. (1996) Are coronal mass ejections caused by magnetic pumping? Solar Physics, 169(2), pp. 415-420. (doi: 10.1007/BF00190617)

Fletcher, L. (1996) On determining flare beam parameters from loop-top hard x-ray sources. Astrophysical Letters and Communications, 34(1-6), pp. 151-156.

1995

Fletcher, L. (1995) On the generation of loop-top impulsive hard X-ray sources. Astronomy and Astrophysics, 303, L9-L12.

Fletcher, L. and Brown, J. (1995) Solar flare Hα impact polarization from high energy electrons? Archives of Disease in Childhood, 294, pp. 260-269.

1994

Fletcher, L. (1994) Modelling particle transport with stochastic simulations. Space Science Reviews, 68(1-4), pp. 239-242. (doi: 10.1007/BF00749144)

1992

Brown, J.C. and Fletcher, L. (1992) H-alpha polarization of wind-heated optical bullets in SS 433. Astronomy and Astrophysics, 259(2), L43-L45.

1990

Petrovay, K., Brown, J.C., van Driel-Gesztelyi, L., Fletcher, L. , Marik, M. and Stewart, G. (1990) Asymmetric flux loops in active regions, II. Solar Physics, 127(1), pp. 51-64. (doi: 10.1007/BF00158513)

This list was generated on Thu Apr 3 19:07:34 2025 BST.

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