Speaker
Dr
Alisson Dal Lago
(National Institute for Space Research)
Description
It is well known that cosmic rays with energies below 100 GeV are significantly modulated by solar wind structures populating the heliosphere, which originate at the Sun. We apply a cross wavelet transform and wavelet coherence for examining relationships in time frequency space between isotropic and anisotropic components of cosmic rays data from the Global Muons Detectors Network (GMDN) and solar wind plasma amd magnetic field time series. The GMDN is composed of four muon detectors installed, in chronological order, in Nagoya, Japan (1969), Hobart, Australia (1992), São Martinho da Serra, Brazil (2001) and Kuwait, Kuwait (2006). With this spectral coherence analysis we can identify, from 2007 to 2012, periods of greater coherence between the anisotropy of cosmic ray data and the interplanetary medium parameters (magnetic field and solar wind). We identify periods in which cosmic ray modulation is enhanced due to particular solar structures.
| Registration number following "ICRC2015-I/" | 988 |
|---|---|
| Collaboration | -- not specified -- |
Author
Marlos Rockenbach
(National Institute for Space Research)
Co-authors
Dr
Alisson Dal Lago
(National Institute for Space Research)
Dr
Carlos Roberto Braga
(National Institute for Space Research)
Dr
Kazuoki Munakata
(Shinshu University)
Dr
Nelson Jorge Schuch
(National Institute for Space Research)
Mr
Rafael Mendonça
(National Institute for Space Research)
