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Browsing by Author "O'Shea, E"

Browsing by Author "O'Shea, E"

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  • Statistical detection of propagating waves in a polar coronal hole 
    Gupta, G. R; O'Shea, E; Banerjee, D; Popescu, M; Doyle, J. G (Springer, 2010)
    Waves are important in the heating of the solar corona and the acceleration of the solar wind. We have examined a long spectral time series sampling a southern coronal hole, observed on the 25 February 1997 using the SUMER ...
  • Transition region counterpart of a moving magnetic feature 
    Lin, C. -H; Banerjee, D; O'Shea, E; Doyle, J. G (EDP Sciences, 2006-12)
    this which we seek to address in this work. Aims.In this work we aim to investigate the chromospheric and transition-region dynamics associated with a moving magnetic monopole by using spectral time-series and ...
  • Variation of line widths in coronal hole off-limb regions: evidence for long-term structuring in plumes 
    O'Shea, E; Banerjee, D; Doyle, G (European Space Agency, 2004-12)
    A detailed analysis of an off-limb polar region observed over a number of weeks by the Coronal Diagnostic Spectrometer (CDS), on board the SOHO spacecraft, is presented. Form a measurement of a number of coronal lines we ...
  • Variation of line widths in polar off-limb regions 
    Banerjee, D; O'Shea, E; Doyle, J. G (European Space Agency, 2005-12)
    Using measurement from the Coronal Diagnostic Spectrometer (CDS) on board SOHO we seek to examine the relative roles of radiative and Collisional excitation in regions far off-limb at the Northern pole of the sun. We study ...

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