Abstract Details
| Name: Bhupendra Kumar Tiwari Affiliation: A.P.S. University Rewa M.P. Conference ID: ASI2018_422 Title : Study of Solar-Interplanetary causes and their Impact on GCR fluxes During Solar Minimum of SC 23/24 Authors and Co-Authors : Bhupendra Kumar Tiwari Department of Physics A.P.S. University Rewa M.P. Abstract Type : Poster Abstract Category : Sun and the Solar System Abstract : Abstract Galactic cosmic ray (GCR) flux at earth is modulated by the heliospheric magnetic field. Heliospheric modulation potential during grand solar minimum is observed using an open solar flux (OSF) model, with OSF source based on Sunspot number. The structure of the heliosphere controls by the solar outputs and their variability, produce changes in cosmic ray intensity. Observation based on the data taken from Omniweb data centre for solar- interplanetary data and yearly mean count rate of cosmic ray intensity (CRI) variation data from Oulu(Rc= 0.80 GV) and Moscow (Rc=2.42 GV) neutron monitors during 1996-2016. It is observed that slow decline of solar cycle 23 and slow rise of solar cycle 24 resulted prolonged of low solar activity which lasted about 2006 to 2009 with 2008 and 2009 being sun is remarkably quiet, therefore solar minimum between cycle 23 and 24 was very extended and deep in contrast to previous solar minima’s 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 between sunspot number & GCR flux. It is also found that correlation between the count rate of cosmic ray intensity with solar indices and heliospheric parameters. Keywords- Galactic Cosmic ray intensity (GCRI), Interplanetary Coronal mass ejections (ICMEs), Interplanetary magnetic field (IMF), Solar activity (SA) |