Interacting Coronal Mass Ejections


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 		Research Interests:

  • So far, my main interest has been the study of the interaction of multiple Coronal Mass Ejections (CMEs) between the Sun and the Earth, which was the topic of my dissertation.

    Interacting CMEs happen as the result of two factors: except near solar minimum, there are 3-6 CMEs per day on average, and the typical propagation time between the Sun and the Earth for a CME is 1-3 days.
    Interacting CMEs and CME cannibalism have been observed in SOHO/LASCO field-of-view (within the first 15% of the Sun-Earth distance). The interaction of CMEs can result at Earth in long-lived geo-magnetic storms and superstorms.
    Studying interacting CMEs leads also to great problems concerning shock properties, merging of shocks and numerical magneto-hydrodynamic (MHD).

  • I came up with a list of articles published about CMEs interacting between the Sun and the Earth (88Kb PDF file). Here is the associated BibTeX file for download.
    If you know a published article on this topic not listed here (or in the .bib file), please email me a reference.

    For an introduction to the current (end of 2006) research on this topic as well as some of the challenges and results, you can read the introduction (1.8Mb) and conclusion (460Kb) of my dissertation.

  • I have also been interested in line-of-sight (white-light) representations of CMEs. Such images, from SOHO/LASCO, STEREO/COR and HI provide the most-known visualization of CMEs. I study synthetic line-of-sight images from three-dimensional numerical simulations to learn about the advantages and limitations of this type of representation.

Publications:
2008:
  • Lugaz, N., Vourlidas, A., Roussev, I. I., Jacobs, C., Manchester, IV, W. B., Cohen, O., The Brightness of Density Structures at Large Solar Elongation Angles: What is Being Observed by STEREO/SECCHI?, Astrophysical Journal Letters, 2008, accepted, 0.75Mb PDF File
  • Manchester, IV, W. B., Vourlidas, A., Toth, G., Lugaz, N., Roussev, I. I., Gombosi, T. I., Sokolov, I. De Zeeuw, D., Opher, M., Three-Dimensional MHD Simulation of the 2003 October 28 Coronal Mass Ejection: Comparison with LASCO Coronagraph Observations, Astrophysical Journal, 2008, accepted
  • Lugaz, N., Manchester, IV, W. B., Roussev, I. I., & Gombosi, T. I., Observational Evidence of CMEs Interacting in the Inner Heliosphere Based on MHD Simulations, Journal of Atmosphere and Solar-Terrestrial Physics, 2008, 70, 598-604, 0.5Mb PDF File
  • Cohen, O., Sokolov, I. V., Roussev, I. I., Lugaz, N., Manchester, IV, W. B, Gombosi, T. I. , & Arge, C. N., Validation of a global 3D heliospheric model with observations for the May 12, 1997 CME event, Journal of Atmosphere and Solar-Terrestrial Physics, 2008, 70, 583-592
  • Aschwanden, M. J., Burlaga, L. F., Kaiswe, M. L., Ng, C. K, Reames, D. V., Reiner, M. J, Gombosi, T. I., Lugaz, N., Manchester, W. IV., Roussev, I. I., Zurbuchen, T. H. and 30 co-authors, Theoretical Modeling for the STEREO Mission, Space Science Reviews, 2008, 136, 565-604, The STEREO Instruments and Mission, eds. C. T. Russel and M. L. Kaiser, doi:10.1007/s11214-006-9027-8
2007:
  • Roussev, I. I., Lugaz, N., Sokolov, I. V., New Physical Insight on the Cahnges in Magnetic Topology During Coronal Mass Ejections: Case Studies for the 2002 April 21 and August 24 Events, Astrophysical Journal Letters, 2007, 668, L87-L90, 0.4Mb PDF File
  • Lugaz, N., Manchester, IV, W. B., Roussev, I. I., Toth, G., & Gombosi, T. I., Numerical Investigation of the Homologous Coronal Mass Ejections from Active Region 9236, Astrophysical Journal, 2007, 659, 788-800, doi:10.1086/51200515.5Mb PDF File
2005:
  • Lugaz, N., Manchester, IV, W. B., & Gombosi, T.I., Numerical Simulation of the Interaction of Two Coronal Mass Ejections from Sun to Earth, Astrophysical Journal, 2005, 634, 651-662, doi:10.1086/491782
    4.7Mb PDF File
  • Lugaz, N., Manchester, IV, W. B., & Gombosi, T. I., The evolution of Coronal Mass Ejection Density Structures, Astrophysical Journal, 2005, 627, 1019-1030, doi:10.1086/430465
    812Kb PDF File
  • Elsner, R. F., Lugaz, N., Waite, J. H., Cravens, T. E., Gladstone, G. R., Ford, P., Grodent, D., Bhardwaj, A., MacDowall, R. J, Desch, M. D., & Majeed, T., Simultaneous Chandra X ray, Hubble Space Telescope ultraviolet, and Ulysses radio observations of Jupiter's aurora, Journal of Geophysical Research, 2005, 110, A9, 1207, doi:10.1029/2004JA010717
2003:
  • Cravens, T. E., Waite, J. H., Gombosi, T. I., Lugaz, N., Gladstone, G. R., Mauk, B. H., & MacDowall, R. J., Implications of Jovian X-ray emission for magnetosphere-ionosphere coupling, Journal of Geophysical Research, 2003, 108, A12, 25-1, doi:10.1029/2003JA010050

A pdf version of my resume including a list of publications can once again be found here.