27-Day variations of galactic cosmic rays and changes of solar and geomagnetic activities

Neutron monitor, solar and geomagnetic activity data have been used to investigate variations of galactic cosmic ray intensity connected with the Sun's rotation for different epochs of solar activity. Behaviors of longitudinal asymmetry of the sunspot distribution, coronal line emission and til...

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Bibliographic Details
Published in:Advances in space research 2001-01, Vol.27 (3), p.619-624
Main Authors: Alania, M.V., Baranov, D.G., Tyasto, M.I., Vernova, E.S.
Format: Article
Language:English
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Summary:Neutron monitor, solar and geomagnetic activity data have been used to investigate variations of galactic cosmic ray intensity connected with the Sun's rotation for different epochs of solar activity. Behaviors of longitudinal asymmetry of the sunspot distribution, coronal line emission and tilt angles of the heliospheric neutral sheet have been studied. A relationship of the temporal changes of the amplitudes of the 27-day variations of galactic cosmic rays and Kp index of geomagnetic activity with the tilt angles of the heliospheric neutral sheet have been investigated. It is shown that there are no any noticeable relationship between the amplitudes of the 27-day variations of galactic cosmic rays and the tilt angles of the heliospheric neutral sheet for both of the qA > 0 and the qA 0 cycle than for the qA
ISSN:0273-1177
1879-1948
DOI:10.1016/S0273-1177(01)00091-6