Passive longitudes of solar cosmic ray sources
Abstract
Solar proton events during a period from 1956 to 2012 are considered. Fluences of protons of various energies in these events have been computed. On the basis of these extensive data the inhomogeneity of the distribution of their sources on the Sun along the Carrington longitude has been confirmed, which had been earlier revealed in our studies. Special attention is paid to the discovered interval of "passive longitudes", extensive over the longitude (90-170°) and the life time (the whole period of observations). The summarized proton fluence of the events, which sources belong to this interval of Carrington longitudes, is considerably lower, than the summarized proton fluences of the events in the other heliolongitude intervals. From the 60 most powerful solar proton events during the whole period of observations not more than 1 event has been originated from this interval of "passive longitudes".
- Publication:
-
Journal of Physics Conference Series
- Pub Date:
- February 2013
- DOI:
- 10.1088/1742-6596/409/1/012203
- Bibcode:
- 2013JPhCS.409a2203G