Analysis of the Doppler shifts of spectral lines obtained by CDS/SOHO instrument
Gömöry P.1, Rybák J.1, Kucera A.1, Curdt W.2, Wöhl H.3
1 Astronomical Institute of the Slovak Academy of Sciences,
SK-05960 Tatranská Lomnica, Slovakia
2 Max-Planck-Institut für Sonnensystemforschung, D-37189 Katlenburg-Lindau, Germany
3 Kiepenheuer-Institut für Sonnenphysik, D-79104 Freiburg, Germany
Abstract:
SOHO/CDS measurements of the quiet Sun
chromospheric He I 584.33 A and transition region
O V 629.73 A spectral lines are used to study
ability of the CDS instrument to detect the Doppler shifts of spectral
lines in the supergranular network and internetwork using short exposures.
Precise analysis has shown that the CDS instrument is not suitable for
the detection of the mass motion in the internetwork, but in contrast,
it is suitable for such detection in the network.