ON MUTUAL RELATION AMONG THE OUTER ATMOSPHERIC LAYERS IN NETWORK: SOHO/CDS STUDY

摘要

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 –190 s (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 +150 s (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.