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

North-south anisotropy of galactic cosmic rays observed with the Global Muon Detector Network (GMDN)

4 Aug 2015, 15:15
15m
Mississippi (World Forum)

Mississippi

World Forum

Churchillplein 10 2517 JW Den Haag The Netherlands
Oral contribution SH-EX Parallel SH 07 Modulation I

Speaker

Prof. Kazuoki Munakata (Department of Physics, Shinshu University)

Description

We analyze the north-south anisotropy (NSA) of galactic cosmic rays (GCRs) observed with the GMDN on hourly basis in the “toward” (T) and “away” (A) IMF sectors separately. From the monthly mean and its standard error of NSA in each of T and A sectors, we deduce the “T/A separation” and its temporal variation during a period between 2006 and 2014. We also examine the “success rate” which is a ratio of the number of hours when the sign of the observed NSA is positive (negative) in T (A) IMF sector to the total number of hours and is introduced as a parameter indicating to what extent we can infer the IMF sector polarity from the sign of the observed NSA. The temporal variations of “T/A separation” and “success rate” will be discussed in relation to the solar modulation of GCRs in the Solar Cycle 24.
Collaboration -- not specified --
Registration number following "ICRC2015-I/" 126

Primary author

Prof. Kazuoki Munakata (Department of Physics, Shinshu University)

Co-authors

Dr Alisson Dal Lago (National Institute for Space Research (INPE)) Prof. Chihiro Kato (Department of Physics, Shinshu University) Prof. Hala K. Al Jassar (Physics Department, Faculty of Science, Kuwait University) Prof. Ismail Sabbah (Department of Natural Sciences, Collage of Health Sciences, the Public Authority of Applied Education and Training, Kuwait) Dr John E. Humble (School of Physical Sciences, University of Tasmania) Prof. John W. Bieber (Bartol Research Institute and Department of Physics and Astronomy, University of Delaware) Prof. Madan M. Sharma (Physics Department, Faculty of Science, Kuwait University) Dr Marcus L. Duldig (School of Physical Sciences, University of Tasmania) Dr Marlos Rockenbach (Southern Regional Space Research Center (CRS/INPE)) Mr Masayoshi Kozai (Department of Physics, Shinshu University) Prof. Munetoshi Tokumaru (STE-lab., Nagoya University) Dr Nelson Jorge Schuch (Southern Regional Space Research Center (CRS/INPE)) Prof. Paul Evenson (Bartol Research Institute and Department of Physics and Astronomy, University of Delaware) Dr Takao Kuwabara (International Center for Hadron Astrophysics, Chiba University)

Presentation Materials