Comparisons of the green-line corona brightness with the magnetic field strength and the summary sunspot area

Rok, strany: 2007, 125 - 141

Comparisons of the Fe XIV 530.3 nm coronal emission line brightness strength (extrapolated from the photospheric measurements to the 1.1 R_☉ distance in the corona), are discussed. Different correlations of the coronal green line brightness (CGLB) with the large-scale coronal magnetic fields and the local fields of sunspots are found during different solar cycle phases. At the ascending phase of activity the large-scale coronal magnetic fields dominate, whereas at the descending phase a somewhat higher correlation of the CGLB with the local magnetic fields of sunspots is observed. It is shown that within the ±40° solar low-latitude zone a portion of the CGLB originating due to the large scale magnetic field amounts to 25-30% in the period of solar cycle maximum but it goes up to 85% at the cycle minimum. Impact of the local sunspot fields on the CGLB level is remarkably lesser, it provides only 8-10% of the CGLB during cycle maximum and increases to about 18% at its minimum. Results of this paper could be helpful when testifying various models of the solar corona heating.

ISO 690:

Badalyan, O., Bludova, N., Sýkora, J. 2007. Comparisons of the green-line corona brightness with the magnetic field strength and the summary sunspot area. In Contributions of the Astronomical Observatory Skalnaté Pleso, vol. 37, no.2, pp. 125-141. 1335-1842.

APA:

Badalyan, O., Bludova, N., Sýkora, J. (2007). Comparisons of the green-line corona brightness with the magnetic field strength and the summary sunspot area. Contributions of the Astronomical Observatory Skalnaté Pleso, 37(2), 125-141. 1335-1842.