On Mutual Relation of the Outer Atmospheric Layers in Network: SOHO/CDS and TRACE Study
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 emission in the network
of the quiet solar atmosphere near disk center were used to
derive mutual relations of emission and dynamics in different
temperature regimes in/above supergranular network. Cross-correlation
functions of the line intensities and the Doppler shifts of the chromospheric
line He I 584.3 A, the transition region line O V 629.7 A
and the coronal line Mg IX 396.1 A,were calculated in order to
study relative variability of different atmospheric layers. Relatively
high correlations were found between the intensities and the Doppler shifts
of the He I and O V lines with two peaks of the intensity
correlation function. The maximum value of the correlation of intensities
(CC_max=0.86) was reached for the zero time lag and the second
maximum (CC=0.78) was obtained for the time lag -190s
(O V precedes He I).
Only one sharp peak (CC_max=0.55) was detected in the Doppler shift
correlation function of these lines for the zero time lag.
For the correlation of O V and Mg IX intensities
one peak (CC_max=0.57) of the correlation function was also discovered
for the time lag +150s (Mg IX falls behind O V).
In contrast, no correlation was obtained for the Doppler shifts of the
O V and Mg IX lines. Summarizing we can
assume clear relation in energy transfer and/or mass motion between
chromosphere and transition region but no relation was found between
corona and the lower parts of the solar atmosphere above the
particular network under study.