AbstractWe have obtained the Calcium K-line profiles, on daily basis, at all latitudes, while integrating the spectrum over the visible longitudes of the Sun by moving a ∼340 mm solar image at a uniform speed in the E–W direction of the Sun. The spectra were recorded at a dispersion of 9.34 mm/Å on 35 mm Kodak 103-a0 film for the time period of 1986–95. Then we started to obtain the spectra using 1k×1k liquid cooled CCD Camera. We plan to study possible long-term variations in the chromospheric rotation rate, differential rotation rate, and changes in Polar Regions with the phase of the solar cycle using various parameters of this line. Here we discuss the variation in K-line flux, K1-width and K2-width in terms of the contribution from plages and variation in the network flux with the phase of the solar cycle.


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    Title :

    Variation in the network flux as derived from the Calcium K-line profiles as function of latitude and solar cycle phase


    Contributors:
    Singh, Jagdev (author) / Gholami, Iraj (author) / Muneer, S (author)

    Published in:

    Advances in Space Research ; 34 , 2 ; 265-268


    Publication date :

    2003-04-15


    Size :

    4 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    Variation in the Network Flux as Derived from the Calcium K-Line Profiles as Function of Latitude and Solar Cycle Phase

    Singh, J. / Gholami, I. / Muneer, S. et al. | British Library Conference Proceedings | 2004


    The Calcium K-Line Profiles as Function of Latitude and Solar Cycle Phase

    Singh, J. / Scientific Committee on Solar-Terrestrial Physics | British Library Conference Proceedings | 2002