Browsing by Author "O`Shea, E"

Now showing items 3-6 of 6

Multi-wavelength study of a high velocity event near a sunspot

Lin, C. -H; Banerjee, D; O`Shea, E; Doyle, J. G (2006-05)

Context: .Jets with velocities higher than 200 km s-1 are often observed in the X-ray spectral range in the solar atmosphere, however, very few such objects are observed in the EUV range. Aims: .We report on an eruptive ...
On the widths and ratios of MgX 609.79 and 624.94 Å lines in polar off-limb regions

O`Shea, E; Banerjee, D; Doyle, J. G (EDP Science, 2005-06)

Using measurements of MgX 609.78 and 624.94 Å lines from the Coronal Diagnostic Spectrometer (CDS) on board SOHO, we seek to examine the variation of line width and line ratio in regions far off-limb at the Northern pole ...
A statistical study of wave propagation in coronal holes

O`Shea, E; Banerjee, D; Doyle, J. G (Astronomy and Astrophysics, Vol. 463, pp. 713 - 725, 2007-02)

Aims.To find evidence for propagating magnetoacoustic waves in equatorial and polar coronal hole locations. Methods: Using temporal series data from the Coronal Diagnostic Spectrometer (CDS) on SOHO, we study oscillations ...
Very long period activity at the base of solar wind streams

Popescu, M. D; Banerjee, D; O`Shea, E; Doyle, J. G; Xia, L. D (EDP Science, 2005-11)

Using time series data of spectral lines originating from a wide range of temperatures in the solar transition region, above a polar coronal hole, from SUMER (Solar Ultraviolet Measurements of Emitted Radiation) on SoHO ...

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