Study of interplanetary magnetic structures using cosmic ray data from the global muon detector network

• Grant number: 13/02712-8
• Support type: Scholarships abroad - Research Internship - Doctorate
• Effective date (Start): August 01, 2013
• Effective date (End): July 31, 2014
• Field of knowledge: Physical Sciences and Mathematics - Geosciences - Geophysics
• Principal Investigator: Alisson Dal Lago
• Grantee: Carlos Roberto Braga
• Supervisor abroad: Kazuoki Munakata
• Home Institution: Instituto Nacional de Pesquisas Espaciais (INPE). Ministério da Ciência, Tecnologia, Inovações e Comunicações (Brasil). São José dos Campos , SP, Brazil
• Local de pesquisa : Shinshu University, Japan
• Associated to the scholarship: 12/05436-9 - Study of coronal mass ejections and their interplanetary counterparts combining observations of ground cosmic ray detectors and coronagraphs, BP.DR

Abstract

Cosmic ray with energy on the GeV range are modulated in the vicinity of the Earth by interplanetary structures like magnetic clouds. The interplanetary magnetic structures affect specially the diffusion and convection of cosmic ray. Thanks to the simultaneous observation of secondary cosmic ray (muons) in different places on the Earth surface, it is possible to reconstruct the spatial distribution of the primary cosmic ray in the interplanetary medium in the vicinity of the Earth. The aim of this project is to find the geometry and orientation of magnetic clouds observed in the interplanetary medium from 2006 to 2012 using combined observations of the four muon detectors from the Global Muon Detector Network. The methodology consists on correcting atmospheric effects on muon observation, deriving the spatial distribution of cosmic ray (anisotropy vector), its gradient and finally, comparing with cosmic ray transport simulation results to infer its geometry and orientation. (AU)

Scientific publications

(References retrieved automatically from Web of Science and SciELO through information on FAPESP grants and their corresponding numbers as mentioned in the publications by the authors)

ADHIKARI, BINOD; SAPKOTA, NIRAKAR; BARUWAL, PRASHRIT; CHAPAGAIN, NARAYAN P.; BRAGA, CARLOS ROBERTO. Impacts on Cosmic-Ray Intensity Observed During Geomagnetic Disturbances. SOLAR PHYSICS, v. 292, n. 10 OCT 2017. Web of Science Citations: 2.

BRAGA, CARLOS ROBERTO; DAL LAGO, ALISSON; ECHER, EZEQUIEL; STENBORG, GUILLERMO; SOUZA DE MENDONCA, RAFAEL RODRIGUES. Pseudo-automatic Determination of Coronal Mass Ejections' Kinematics in 3D. ASTROPHYSICAL JOURNAL, v. 842, n. 2 JUN 20 2017. Web of Science Citations: 2.

KOZAI, M.; MUNAKATA, K.; KATO, C.; KUWABARA, T.; ROCKENBACH, M.; DAL LAGO, A.; SCHUCH, N. J.; BRAGA, C. R.; MENDONCA, R. R. S.; AL JASSAR, H. K.; SHARMA, M. M.; DULDIG, M. L.; HUMBLE, J. E.; EVENSON, P.; SABBAH, I.; TOKUMARU, M. AVERAGE SPATIAL DISTRIBUTION OF COSMIC RAYS BEHIND THE INTERPLANETARY SHOCK-GLOBAL MUON DETECTOR NETWORK OBSERVATIONS. ASTROPHYSICAL JOURNAL, v. 825, n. 2 JUL 10 2016. Web of Science Citations: 3.