Title: Variability of CaII K Emission Flux Over the Solar Cycle
Author: R. Kariyappa
Affil: Indian Institute of Astrophysics, Bangalore 560034, INDIA
Email: rkari@iiap.ernet.in
Abstract: We have analyzed a high spectral resolution CaII K line profiles obtained in integrated Sun light (Sun as a Star) from a scatter free system, Double Pass Spectrograph, of the Indian Institute of Astrophysics, Bangalore for the period 1989 - 1993. The various parameters of the K-line profiles have been extracted. The total K-emission flux centered around 1A pass band has also been derived from all the line profiles. This flux has been compared with 1A K Index of NSO/Sac Peak and UV irradiance measured in MgII h & k lines, and found that they are well correlated each other. It would enable us to construct a model of the chromosphere using the line profile parameters and would serve as a reference for inferring the chromospheric variations in other Sun like stars as a function of stellar activity.