SUMER study #2216: Quiescent prominence - Results IV
Line widths vs. "hot/main/cool" regions
Some significant line widths were transformed from FWHM (in Å) into
turbulent velocities (in km/s) by
delta_v = c * delta_lambda_Doppler / lambda_0
This was done
separately for the selected regions "hot", "main", and "cool". Obviously, the
Lyman lines do not behave like the rest of the lines, which slowly rise from
20-30 km/s to 40-50 km/s, while the line formation temperatures rise from
10 000 K to 1 000 000 K. So the Lyman lines were excluded from the polynomial
fits and the averages per day and per region. As can be seen in the images
below, there is a tendency that
- the line widths in the prominence of 04 Jul 00 are generally broader than on
08 Jul 00,
- the line widths in the "hot" regions are slightly broader than in the "main"
regions, which in turn are broader than in the "cool" regions.