Computer Science
Scientific paper
Jun 1999
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1999aipc..471..305d&link_type=abstract
The solar wind nine conference. AIP Conference Proceedings, Volume 471, pp. 305-308 (1999).
Computer Science
1
Ultraviolet
Scientific paper
We analyzed the UVCS/SOHO data obtained during the Whole Sun Month campaign in 1996 and compared the H I Lyα (1216Å) and O VI (1032Å,1037Å) emission in the polar and equatorial coronal holes. We found that the emission lines have similar characteristics in these two types of coronal holes. Both types show evidence for superradially diverging boundaries. We used the O VI (1032Å) and O VI (1037Å) local emissivities, determined from the 3D tomographic reconstruction of the solar corona, to investigate the outflow velocities from the polar and equatorial coronal holes. The latitudinal distribution of the O VI ratio at 2.21 Rsolar, free from the line-of-sight effect, shows evidence that the equatorial coronal hole may have O+5 outflow velocities lower than in the polar coronal holes.
Dobrzycka Danuta
Kohl John L.
Panasyuk Alexander V.
Strachan Leonard
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