A Study of Transition Region and Coronal Doppler Shifts in a Solar Coronal Hole

Details A Study of Transition Region and Coronal Doppler Shifts in a Solar Coronal Hole A Study of Transition Region and Coronal Doppler Shifts in a Solar Coronal Hole

Jan 2004

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004esasp.547..363p&link_type=abstract

Proceedings of 'SOHO 13 - Waves, Oscillations and Small-Scale Transient Events in the Solar Atmosphere: A Joint View from SOHO a

Computer Science

Sun: Euv Radiation, Doppler Line-Shifts, Coronal Holes, Chromospheric Network, Fast Solar Wind

Scientific paper

We present a study of a high spatial resolution raster scan taken on-disk with the SoHO/SUMER spectrograph in a solar polar Coronal Hole (CH) region. We have analysed the line shifts and widths of two EUV emitting ions, O III 703.87 Å and Mg IX 706.02 Å. Our results confirm plasma outflows from CHs. In particular, the correlation between the intensity and the Doppler velocity in the case of the O III line constitute the lowest precise indication of fast wind streams seen originating from the network boundaries in the transition region.

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