Abstract Details

Name: Bhupendra kumar Tiwari
Affiliation: A.P.S.University Rewa M.P.
Conference ID: ASI2020_420
Title : Study of Solar–Interplanetary causes and Their Impact on GCR Fluxes
Authors and Co-Authors : B.K.Tiwari
Abstract Type : Poster
Abstract Category : Sun and the Solar System
Abstract : The Changes in Galactic Cosmic Rays (GCRs) intensity for the period of 1996-2018 using neutron monitors experimental data, we observed that an increase of the GCRs intensity is generally related with the structure of the heliosphere controls by solar variability and produce changes in GCR intensity, and decrease of solar wind velocity Vsw (<450 Km/sec), strength of B of the interplanetary magnetic field, and the drift in negative (A<0) polarity epoch. Based on the observation from Omniweb data Centre for solar- interplanetary data and yearly/monthly mean count rate of cosmic ray intensity (CRI) variation data from Oulu / Moscow neutron monitors (Rc=0.80 GV &Rc= 2.42 GV) during 1996-2018 . It is observed that the sunspot is low and the strength of the interplanetary magnetic field has been falling off to new low levels , reduces the GCR entering inner- heliosphere and it is high anti-correlation ( r = -0.78) between sunspot number & GCR flux. We find, during this unusual minimum, the correlation of GCR intensity is poor with sunspot number(r=-0.40), better with IMF (r=-0.78) and SWV (r=-0.80) and much better with the tilt angle of the heliospheric current sheet (r=-0.90). It is also found that 10.7 cm solar radio flux, velocity of solar wind and the strength and turbulence of the interplanetary magnetic field were positive correlated with each other and inverse correlated with count rate of cosmic ray intensity. Keywords- Galactic Cosmic Rays (GCRs), Solar Wind Velocity (SWV) Sunspot Number (SSN).