Solar activity and cosmic radiation: Sun's magnetic field and cosmic radiation levels. (Slovak Title: Slnečná aktivita a kozmické 'iarenie: magnetické pole Slnka a úroveň kozmického žiarenia)

Details Solar activity and cosmic radiation: Sun's magnetic field and cosmic radiation levels. (Slovak Title: Slnečná aktivita a kozmické 'iarenie: magnetické pole Slnka a úroveň kozmického žiarenia) Solar activity and cosmic radiation: Sun's magnetic field and cosmic radiation levels. (Slovak Title: Slnečná aktivita a kozmické 'iarenie: magnetické pole Slnka a úroveň kozmického žiarenia)

Dec 2010

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010nspm.conf..175b&link_type=abstract

Proceedings of the 20th National Solar Physics Meeting, held 31 May - 4 June, 2010 in Papradno, Slovakia, p. 175-178

Physics

Scientific paper

In this work we have analyzed the correlation of the Sun's magnetic activity and cosmic radiation levels during the period 1951-2004. As a solar magnetic activity indicator, affecting the cosmic radiation, we have chosen open magnetic field configurations which we characterized by an open magnetic flux factor (OMFF). The OMFF was calculated from the intensity measurements of the green coronal line. In calculations leading to the relation between the OMFF and galactic cosmic radiation (GCR) levels the cross-correlation of these datasets was used. The goal of this contribution was to find mainly time-dependent changes in the evolution of the OMFF and GCR correlation. In order to do so,besides the correlation calculations based on the long time series of the OMFF and GCR data covering the entire period 1951-2004 we have also calculated the correlation of the OMFF and GCR data from shorter periods (180 days). We have found that the cross-correlation evolution varies depending on the phase of the solar cycle. During the minimum the evolution is characterized by conspicuous periodicity with a period ~ 14 days and the cross-correlation function takes statistically significant values. During the maximum the period of the variations is not clear and the cross-correlation function takes low values that are not statistically significant.

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