Publications of Ryan O. Milligan

A list of publications authored or co-authored by Ryan O. Milligan, derived from the SAO/NASA Astrophysics Data System (ADS). The number in brackets after each title indicates the number of citations that the paper has received.

Orcid ID: 0000-0001-5031-1892

List of publications ordered by citations
Number of papers: 73 (refereed: 59)
No. of citations: 2372
First author papers: 23 (refereed: 17)

2026

  1. Spatial variation of energy transport mechanisms within solar flare ribbons [0]
    Kerr, Graham S., Krucker, Säm, Allred, Joel C., Rodríguez-Gómez, Jenny M., Inglis, Andrew R., Ryan, Daniel F., Hayes, Laura A., Milligan, Ryan O., Kowalski, Adam F., Plowman, Joseph E., Young, Peter R., Kucera, Therese A. & Brosius, Jeffrey W., Nature Astronomy, ,
  2. Eruption-Related Ultraviolet Irradiance Enhancements Associated with Flares [0]
    Majury, Luke, Dominique, Marie, Milligan, Ryan, Talpeanu, Dana-Camelia, Dammasch, Ingolf & Berghmans, David, Solar Physics, 301, 5

2025

  1. Response of Ionospheric Total Electron Content to the Impulsive and Late Phases of X Class Solar Flares With Various Center to Limb Locations [2]
    Bekker, S. Z., Milligan, R. O. & Ryakhovsky, I. A., Journal of Geophysical Research (Space Physics), 130, e2025JA034281
  2. Spectral Irradiance Variability in Lyman-Alpha Emission During Solar Flares [3]
    Majury, Luke, Milligan, Ryan, Butler, Elizabeth, Greatorex, Harry & Kazachenko, Maria, Solar Physics, 300, 64
  3. Observations of Flare Induced Doppler Shifts in the Si III 1206 Å Line [0]
    Majury, Luke H. & Milligan, Ryan O., Solar Physics, 300, 131
  4. Quasi-Periodic Pulsations in Ionospheric TEC Synchronized With Solar Flare EUV Emission [5]
    O'Hare, Aisling N., Bekker, Susanna, Hayes, Laura A. & Milligan, Ryan O., Journal of Geophysical Research (Space Physics), 130, e2024JA033493
  5. Investigating a Characteristic Time Lag in the Ionospheric F-Region's Response to Solar Flares [2]
    O'Hare, Aisling N., Bekker, Susanna, Greatorex, Harry J. & Milligan, Ryan O., Atmosphere, 16, 937

2024

  1. The Influence of Different Phases of a Solar Flare on Changes in the Total Electron Content in the Earth's Ionosphere [6]
    Bekker, Susanna, Milligan, Ryan O. & Ryakhovsky, Ilya A., ApJ, 971, 188
  2. On the Instrumental Discrepancies in Lyman-Alpha Observations of Solar Flares [5]
    Greatorex, Harry J., Milligan, Ryan O. & Dammasch, Ingolf E., Solar Physics, 299, 162
  3. The Solar EruptioN Integral Field Spectrograph [1]
    Herde, Vicki L., Chamberlin, Phillip C., Schmit, Don, Daw, Adrian, Milligan, Ryan O., Polito, Vanessa, Bose, Souvik, Boyajian, Spencer, Buedel, Paris, Edgar, Will, Gebben, Alex, Gong, Qian, Jacobsen, Ross, Nell, Nicholas, Schwab, Bennet, Sims, Alan, Summers, David, Turner, Zachary, Valade, Trace & Wallace, Joseph, Solar Physics, 299, 120

2023

  1. Observational Analysis of Lyα Emission in Equivalent-magnitude Solar Flares [6]
    Greatorex, Harry J., Milligan, Ryan O. & Chamberlin, Phillip C., ApJ, 954, 120
  2. Spicules in IRIS Mg II Observations: Automated Identification [3]
    Herde, Vicki L., Chamberlin, Phillip C., Schmit, Don, Bose, Souvik, Daw, Adrian, Milligan, Ryan O. & Polito, Vanessa, ApJ, 946, 103
  3. Prospects of Detecting Nonthermal Protons in Solar Flares via Lyman Line Spectroscopy: Revisiting the Orrall-Zirker Effect [17]
    Kerr, Graham S., Allred, Joel C., Kowalski, Adam F., Milligan, Ryan O., Hudson, Hugh S., Zambrana Prado, Natalia, Kucera, Therese A. & Brosius, Jeffrey W., ApJ, 945, 118
  4. Formation of the Lyman Continuum during Solar Flares [6]
    McLaughlin, Shaun A., Milligan, Ryan O., Kerr, Graham S., Monson, Aaron J., Simões, Paulo J. A. & Mathioudakis, Mihalis, ApJ, 944, 186

2022

  1. The high-energy Sun - probing the origins of particle acceleration on our nearest star [3]
    Matthews, S. A., Reid, H. A. S., Baker, D., Bloomfield, D. S., Browning, P. K., Calcines, A., Del Zanna, G., Erdelyi, R., Fletcher, L., Hannah, I. G., Jeffrey, N., Klein, L., Krucker, S., Kontar, E., Long, D. M., MacKinnon, A., Mann, G., Mathioudakis, M., Milligan, R., Nakariakov, V. M., Pesce-Rollins, M., Shih, A. Y., Smith, D., Veronig, A. & Vilmer, N., Experimental Astronomy, 54, 335
  2. Call and Response: A Time-resolved Study of Chromospheric Evaporation in a Large Solar Flare [6]
    Sellers, Sean G., Milligan, Ryan O. & McAteer, R. T. James, ApJ, 936, 85
  3. Observation of a Flare and Filament Eruption in Lyman-α on 8 September 2011 by the PRoject for OnBoard Autonomy/Large Yield Radiometer (PROBA2/LYRA) [7]
    Wauters, L., Dominique, M., Milligan, R., Dammasch, I. E., Kretzschmar, M. & Machol, J., Solar Physics, 297, 36

2021

  1. The effect of a solar flare on chromospheric oscillations [3]
    Millar, David C. L., Fletcher, Lyndsay & Milligan, Ryan O., MNRAS, 503, 2444
  2. Solar Irradiance Variability Due to Solar Flares Observed in Lyman-Alpha Emission [12]
    Milligan, Ryan O., Solar Physics, 296, 51
  3. Flare-induced Photospheric Velocity Diagnostics [17]
    Monson, Aaron J., Mathioudakis, Mihalis, Reid, Aaron, Milligan, Ryan & Kuridze, David, ApJ, 915, 16
  4. Flare-induced Sunquake Signatures in the Ultraviolet as Observed by the Atmospheric Imaging Assembly [1]
    Quinn, Sean, Mathioudakis, Mihalis, Nelson, Christopher J., Milligan, Ryan O., Reid, Aaron & Jess, David B., ApJ, 920, 25

2020

  1. Solar Flare Energy Partitioning and Transport -- the Gradual Phase (a Heliophysics 2050 White Paper) [2]
    Kerr, Graham S., Alaoui, Meriem, Allred, Joel C., Bian, Nicholas H., Dennis, Brian R., Emslie, A. Gordon, Fletcher, Lyndsay, Guidoni, Silvina, Hayes, Laura A., Holman, Gordon D., Hudson, Hugh S., Karpen, Judith T., Kowalski, Adam F., Milligan, Ryan O., Polito, Vanessa, Qiu, Jiong & Ryan, Daniel F., arXiv:2009.08407
  2. Solar Flare Energy Partitioning and Transport -- the Impulsive Phase (a Heliophysics 2050 White Paper) [6]
    Kerr, Graham S., Alaoui, Meriem, Allred, Joel C., Bian, Nicholas H., Dennis, Brian R., Emslie, A. Gordon, Fletcher, Lyndsay, Guidoni, Silvina, Hayes, Laura A., Holman, Gordon D., Hudson, Hugh S., Karpen, Judith T., Kowalski, Adam F., Milligan, Ryan O., Polito, Vanessa, Qiu, Jiong & Ryan, Daniel F., arXiv:2009.08400
  3. Lyman-alpha Variability During Solar Flares Over Solar Cycle 24 Using GOES-15/EUVS-E [38]
    Milligan, Ryan O., Hudson, Hugh S., Chamberlin, Phillip C., Hannah, Iain G. & Hayes, Laura A., Space Weather, 18, e02331

2019

  1. The Spectral Content of SDO/AIA 1600 and 1700 Å Filters from Flare and Plage Observations [65]
    Simões, Paulo J. A., Reid, Hamish A. S., Milligan, Ryan O. & Fletcher, Lyndsay, ApJ, 870, 114

2018

  1. Lyman Continuum Observations of Solar Flares Using SDO/EVE [6]
    Machado, Marcos E., Milligan, Ryan O. & Simões, Paulo J. A., ApJ, 869, 63
  2. Detection of Three-minute Oscillations in Full-disk Lyman-alpha Emission during a Solar Flare [0]
    Milligan, Ryan O., Fleck, Bernhard, Ireland, Jack, Fletcher, Lyndsay & Dennis, Brian R., Catalyzing Solar Connections, p. 36
  3. SDO/EVE Observations of Lyman Continuum Emission During Solar Flares [0]
    Milligan, Ryan O., Machado, Marcos E. & Simões, Paulo J. A., Catalyzing Solar Connections, p. 35
  4. On the Performance of Multi-Instrument Solar Flare Observations During Solar Cycle 24 [12]
    Milligan, Ryan O. & Ireland, Jack, Solar Physics, 293, 18
  5. Reproducing Type II White-light Solar Flare Observations with Electron and Proton Beam Simulations [29]
    Procházka, Ondřej, Reid, Aaron, Milligan, Ryan O., Simões, Paulo J. A., Allred, Joel C. & Mathioudakis, Mihalis, ApJ, 862, 76
  6. The spectral content of SDO/AIA 1600 and 1700 A filters from flare and plage observations [0]
    Simoes, Paulo, Reid, Hamish, Milligan, Ryan & Fletcher, Lyndsay, Catalyzing Solar Connections, p. 125
  7. A Si IV/O IV Electron Density Diagnostic for the Analysis of IRIS Solar Spectra [27]
    Young, P. R., Keenan, F. P., Milligan, R. O. & Peter, H., ApJ, 857, 5

2017

  1. An assessment of Fe xx-Fe xxii emission lines in SDO/EVE data as diagnostics for high-density solar flare plasmas using EUVE stellar observations [3]
    Keenan, F. P., Milligan, R. O., Mathioudakis, M. & Christian, D. J., MNRAS, 468, 1117
  2. Detection of Three-minute Oscillations in Full-disk Lyα Emission during a Solar Flare [39]
    Milligan, Ryan O., Fleck, Bernhard, Ireland, Jack, Fletcher, Lyndsay & Dennis, Brian R., ApJ, 848, L8
  3. Suppression of Hydrogen Emission in an X-class White-light Solar Flare [12]
    Procházka, Ondřej, Milligan, Ryan O., Allred, Joel C., Kowalski, Adam F., Kotrč, Pavel & Mathioudakis, Mihalis, ApJ, 837, 46

2016

  1. Performance of Major Flare Watches from the Max Millennium Program (2001 - 2010) [10]
    Bloomfield, D. S., Gallagher, P. T., Marquette, W. H., Milligan, R. O. & Canfield, R. C., Solar Physics, 291, 411
  2. A Method For Finding Solar Flares Jointly Observed by Multiple Instruments [0]
    Milligan, Ryan, SDO 2016: Unraveling the Sun's Complexity (Editors: Pesnell, W. Dean & Thompson, Barbara), p. 35
  3. Quasi-Periodic Pulsations in Hydrogen Emission During Solar Flares [0]
    Milligan, Ryan, Ireland, Jack & Inglis, Andrew, SDO 2016: Unraveling the Sun's Complexity (Editors: Pesnell, W. Dean & Thompson, Barbara), p. 31
  4. EUV irradiance observations from SDO/EVE as a diagnostic of solar flares [2]
    Milligan, Ryan O., Solar and Stellar Flares and their Effects on Planets (Editors: Kosovichev, A. G., Hawley, S. L. & Heinzel, P.), IAU Symposium, 320, p. 41
  5. Anomalous temporal behaviour of broadband Lyα observations during solar flares from SDO/EVE [20]
    Milligan, Ryan O. & Chamberlin, Phillip C., A&A, 587, A123

2015

  1. Radiative hydrodynamic modelling and observations of the X-class solar flare on 2011 March 9 [35]
    Kennedy, Michael B., Milligan, Ryan O., Allred, Joel C., Mathioudakis, Mihalis & Keenan, Francis P., A&A, 578, A72
  2. Extreme Ultra-Violet Spectroscopy of the Lower Solar Atmosphere During Solar Flares (Invited Review) [59]
    Milligan, Ryan O., Solar Physics, 290, 3399

2014

  1. The Radiated Energy Budget of Chromospheric Plasma in a Major Solar Flare Deduced from Multi-wavelength Observations [103]
    Milligan, Ryan O., Kerr, Graham S., Dennis, Brian R., Hudson, Hugh S., Fletcher, Lyndsay, Allred, Joel C., Chamberlin, Phillip C., Ireland, Jack, Mathioudakis, Mihalis & Keenan, Francis P., ApJ, 793, 70

2013

  1. The Emission Measure Distribution of Impulsive Phase Flare Footpoints [35]
    Graham, D. R., Hannah, I. G., Fletcher, L. & Milligan, R. O., ApJ, 767, 83
  2. Solar Flare Impulsive Phase Emission Observed with SDO/EVE [12]
    Kennedy, Michael B., Milligan, Ryan O., Mathioudakis, Mihalis & Keenan, Francis P., ApJ, 779, 84
  3. Solar Eruptive Events (SEE) 2020 Mission Concept [4]
    Lin, R. P., Caspi, A., Krucker, S., Hudson, H., Hurford, G., Bandler, S., Christe, S., Davila, J., Dennis, B., Holman, G., Milligan, R., Shih, A. Y., Kahler, S., Kontar, E., Wiedenbeck, M., Cirtain, J., Doschek, G., Share, G. H., Vourlidas, A., Raymond, J., Smith, D. M., McConnell, M. & Emslie, G., arXiv:1311.5243
  4. Continuum Contributions to the SDO/AIA Passbands during Solar Flares [12]
    Milligan, Ryan O. & McElroy, Sarah A., ApJ, 777, 12
  5. Solar flare X-ray source motion as a response to electron spectral hardening [9]
    O'Flannagain, A. M., Gallagher, P. T., Brown, J. C., Milligan, R. O. & Holman, G. D., A&A, 555, A21
  6. Decay-phase Cooling and Inferred Heating of M- and X-class Solar Flares [52]
    Ryan, Daniel F., Chamberlin, Phillip C., Milligan, Ryan O. & Gallagher, Peter T., ApJ, 778, 68
  7. Observational Calculation of Flare Filling Factors Using GOES/XRS, SDO/EVE and SDO/AIA [0]
    Ryan, Daniel F., Bowen, Trevor A., Chamberlin, Philip C., Milligan, Ryan O. & Gallagher, Peter T., SDO-3: Exploring the Network of SDO Science (Editors: Pesnell, W. Dean & Thompson, Barbara), p. 133
  8. TEBBS: A New Automatic Method for Calculating Background-Subtracted Thermal Flare Properties Using GOES/XRS [0]
    Ryan, Daniel F., Milligan, Ryan O., Gallagher, Peter T., Dennis, Brian R., Tolbert, A. Kim, Schwartz, Richard A. & Young, C. Alex, SDO-3: Exploring the Network of SDO Science (Editors: Pesnell, W. Dean & Thompson, Barbara), p. 143
  9. An Examination of Flare Cooling Using SDO/EVE [0]
    Ryan, Daniel F., Chamberlin, Phil C., Gallagher, Peter T. & Milligan, Ryan O., SDO-3: Exploring the Network of SDO Science (Editors: Pesnell, W. Dean & Thompson, Barbara), p. 144

2012

  1. Thermal Evolution and Radiative Output of Solar Flares Observed by the EUV Variability Experiment (EVE) [29]
    Chamberlin, P. C., Milligan, R. O. & Woods, T. N., Solar Physics, 279, 23
  2. Properties of Sequential Chromospheric Brightenings and Associated Flare Ribbons [9]
    Kirk, Michael S., Balasubramaniam, K. S., Jackiewicz, Jason, McAteer, R. T. James & Milligan, Ryan O., ApJ, 750, 145
  3. Time-dependent Density Diagnostics of Solar Flare Plasmas Using SDO/EVE [33]
    Milligan, Ryan O., Kennedy, Michael B., Mathioudakis, Mihalis & Keenan, Francis P., ApJ, 755, L16
  4. Observations of Enhanced Extreme Ultraviolet Continua during an X-Class Solar Flare Using SDO/EVE [51]
    Milligan, Ryan O., Chamberlin, Phillip C., Hudson, Hugh S., Woods, Thomas N., Mathioudakis, Mihalis, Fletcher, Lyndsay, Kowalski, Adam F. & Keenan, Francis P., ApJ, 748, L14
  5. The Thermal Properties of Solar Flares over Three Solar Cycles Using GOES X-Ray Observations [79]
    Ryan, Daniel F., Milligan, Ryan O., Gallagher, Peter T., Dennis, Brian R., Tolbert, A. Kim, Schwartz, Richard A. & Young, C. Alex, ApJS, 202, 11

2011

  1. An Observational Overview of Solar Flares [756]
    Fletcher, L., Dennis, B. R., Hudson, H. S., Krucker, S., Phillips, K., Veronig, A., Battaglia, M., Bone, L., Caspi, A., Chen, Q., Gallagher, P., Grigis, P. T., Ji, H., Liu, W., Milligan, R. O. & Temmer, M., Space Science Reviews, 159, 19
  2. Spatially Resolved Nonthermal Line Broadening during the Impulsive Phase of a Solar Flare [65]
    Milligan, Ryan O., ApJ, 740, 70

2010

  1. Solar Satellites [1]
    Dennis, Brian & Milligan, Ryan, Scholarpedia, 5, 6139
  2. Emission lines of FeXI in the 257-407Å wavelength region observed in solar spectra from EIS/Hinode and SERTS [2]
    Keenan, F. P., Milligan, R. O., Jess, D. B., Aggarwal, K. M., Mathioudakis, M., Thomas, R. J., Brosius, J. W. & Davila, J. M., MNRAS, 404, 1617
  3. Evidence of a Plasmoid-Looptop Interaction and Magnetic Inflows During a Solar Flare/Coronal Mass Ejection Eruptive Event [45]
    Milligan, Ryan O., McAteer, R. T. James, Dennis, Brian R. & Young, C. Alex, ApJ, 713, 1292

2009

  1. Velocity Characteristics of Evaporated Plasma Using Hinode/EUV Imaging Spectrometer [198]
    Milligan, Ryan O. & Dennis, Brian R., ApJ, 699, 968
  2. Multi-wavelength observations and modelling of a canonical solar flare [60]
    Raftery, C. L., Gallagher, P. T., Milligan, R. O. & Klimchuk, J. A., A&A, 494, 1127
  3. Rapid Changes of Electron Acceleration Characteristics at the End of the Impulsive Phase of an X-class Solar Flare [53]
    Warmuth, Alexander, Holman, Gordon D., Dennis, Brian R., Mann, Gottfried, Aurass, Henry & Milligan, Ryan O., ApJ, 699, 917

2008

  1. A Hot Microflare Observed with RHESSI and Hinode [27]
    Milligan, Ryan O., ApJ, 680, L157
  2. Flare Cooling and Implications for Hinode/EIS [1]
    Raftery, C. L., Gallagher, P. T. & Milligan, R. O., First Results From Hinode (Editors: Matthews, S. A., Davis, J. M. & Harra, L. K.), Astronomical Society of the Pacific Conference Series, 397, p. 184

2006

  1. Observational Evidence of Gentle and Explosive Chromospheric Evaporation [0]
    Milligan, R. O., Gallagher, P. T., Mathioudakis, M. & Keenan, F. P., SOHO-17. 10 Years of SOHO and Beyond (Editors: Lacoste, H. & Ouwehand, L.), ESA Special Publication, 617, p. 138
  2. Observational Evidence of Gentle Chromospheric Evaporation during the Impulsive Phase of a Solar Flare [106]
    Milligan, Ryan O., Gallagher, Peter T., Mathioudakis, Mihalis & Keenan, Francis P., ApJ, 642, L169
  3. RHESSI and SOHO CDS Observations of Explosive Chromospheric Evaporation [125]
    Milligan, Ryan O., Gallagher, Peter T., Mathioudakis, Mihalis, Bloomfield, D. Shaun, Keenan, Francis P. & Schwartz, Richard A., ApJ, 638, L117

2005

  1. Emission lines of FeXV in spectra obtained with the Solar Extreme-Ultraviolet Research Telescope and Spectrograph [8]
    Keenan, F. P., Aggarwal, K. M., Milligan, R. O., Ryans, R. S. I., Bloomfield, D. S., Srigengan, V., O'Mullane, M. G., Lawson, K. D., Msezane, A. Z., Brosius, J. W., Davila, J. M. & Thomas, R. J., MNRAS, 356, 1592
  2. Fe XI Emission Lines in a High-Resolution Extreme-Ultraviolet Active Region Spectrum Obtained by the Solar Extreme Ultraviolet Research Telescope and Spectrograph [12]
    Keenan, F. P., Aggarwal, K. M., Ryans, R. S. I., Milligan, R. O., Bloomfield, D. S., Brosius, J. W., Davila, J. M. & Thomas, R. J., ApJ, 624, 428
  3. Plasma diagnostics of active-region evolution and implications for coronal heating [15]
    Milligan, R. O., Gallagher, P. T., Mathioudakis, M., Keenan, F. P. & Bloomfield, D. S., MNRAS, 363, 259

Created on Wed Apr 8 04:28:40 2026.