The green corona database and the coronal index of solar activity

Details The green corona database and the coronal index of solar activity The green corona database and the coronal index of solar activity

Oct 2011

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2011coska..41..137m&link_type=abstract

Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 41, no. 2, p. 137-141.

Astronomy and Astrophysics

Astronomy

Sun, Solar Cycle, Green Line Data

Scientific paper

The green coronal line Fe XIV 530.3 nm ranks amongst the most pronounced emission lines in the visible part of the solar spectrum. Its observations outside solar eclipses started sporadically in 1939 (the Arosa coronal station), being extended, in 1946, to more coronal stations. It was found that the green corona intensities vary with solar cycle, so they are a good candidate to express solar activity in the corona. Several attempts have been made to create a single homogeneous coronal data set from different coronal stations. We will present our homogeneous coronal data set, based on the Lomnický Štít photometric scale. Also, the coronal index of solar activity as created from this database in the period 1939—2010 will be discussed.

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