July 29, 2015 to August 6, 2015
World Forum
Europe/Amsterdam timezone

Experimental and Theoretical study of the long period

Aug 4, 2015, 4:00 PM
1h
Theater Foyer (World Forum)

Theater Foyer

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Board: 44
Poster contribution SH-EX Poster 3 SH

Speaker

Michael Alania (Siedlce University)

Description

In order to create a two dimensional time dependent relatively realistic model of galactic cosmic ray transport we have found delay time between changes of the galactic cosmic ray (GCR) intensity, on the one hand, and various parameters determined conditions in heliosphere- sunspot numbers SN , magnitude B of the interplanetary magnetic field (IMF), solar wind velocity U, variance of the B, and an index of the rigidity dependence of the GCR intensity long period variations, on the other. We show that delay time dynamically changes between different pairs of parameters throughout from one 11-year cycle to another and by the same token being a natural obstacle in choice of optimal length of the modelling time interval. We consider two models (1) in which we are installing different parameters with regard delay times and (2) without delay times and results compare with experimental data of neutron monitors. In spite of an inclusion of delay times in modelling is not the straightforward exercises, it is worth to perform, because we obtain an additional information about the modulation of cosmic rays from large distances from the earth's orbit. We show that an acceptable compatibility with the experimental data of neutron monitors is kept for the period of 19761987 (solar cycle #21), when the minimum of the expected temporal changes of the GCR particles density is shifted for 18 months with respect to the minimum of the temporal changes of the smoothed experimental data of the GCR intensity
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 801

Primary author

Michael Alania (Siedlce University)

Co-authors

Prof. K. Iskra (Siedlce University) Marek Siluszyk (Siedlce University)

Presentation materials

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