Title: On relevance of the coronal FeXIV 530.3 nm emission line intensity
for studying the cyclic and evolutionary solar processes
Author: Julius Sykora
Affiliation: Astronomical Institute, Slovak Acad. Sci.
059 60 TATRANSKA LOMNICA
Slovak Republic
Email: sykora@ta3.sk
Author: Olga G. BADALYAN
Affils: IZMIRAN, Troitsk (Moscow), Russia
Abstract:
The coronal green line (CGL) intensity measurements covering the 1943-1999
period and allowing resolution of 1 day in solar longitude and 
in solar latitude are extensively exploited. We are able to distinguish
between different time scales (day-to-day, solar rotation, solar cycle, secular
variations). At the same time, we found suitable and desirable to advance
from analysis of the solar global indices to a better space resolution
by cutting the Sun into the hemispheres, latitudinal zones (equatorial, middle,
polar) and even analysing the brightness evolution at discrete latitudes
(by step of ).
Considering the ISCS goals, the relevance of a number of phenomena found in
the large-scale and long-termed distributions of the CGL intensity is
estimated, demonstrated and discussed. Among them, particular relations
of the CGL intensity, indexed within the middle-latitude zone, to a number
of solar and interplanetary phenomena are enumerated. Variations of the CGL
intensity are described by an evolutionary model in which four regimes were
identified during 11-year solar cycle. Relation of these regimes to evolution
of the large-scale magnetic field is outlined. Extensive comparisons of
the CGL intensity synoptic charts with those of magnetic field reveal
a promising possibility to identify and study coronal holes as back as to 1943.
Capability of our data for the short- and long-termed predictions of solar
activity is also outlined.