Study of anisotropy in the angular distribution of ultra-high energy cosmic rays

• Grant number: 21/04420-0
• Support Opportunities: Scholarships in Brazil - Scientific Initiation
• Start date: July 01, 2021
• End date: December 31, 2021
• Field of knowledge: Physical Sciences and Mathematics - Physics - Elementary Particle Physics and Fields
• Principal Investigator: Carola Dobrigkeit Chinellato
• Grantee: Maria Gabriela Manuel Alves
• Host Institution: Instituto de Física Gleb Wataghin (IFGW). Universidade Estadual de Campinas (UNICAMP). Campinas , SP, Brazil
• Associated research grant: 19/10151-2 - Study of Ultra-High Energy Cosmic Rays with the Pierre Auger Observatory upgrade AugerPrime, AP.ESP

Abstract

Studying the arrival direction distribution of ultra-high energy cosmic rays arriving at Earth is a promising way of learning about their sources and propagation towards us. Since 2004, the Pierre Auger Observatory in Argentina operates and takes data of ultra-high energy cosmic rays. The obtained data allow for a study of anisotropies in the arrival direction distribution of cosmic rays with energies around and above 1 EeV. This project aims to analyze the large-angular scale distribution of the arrival directions of cosmic rays detected at the Pierre Auger Observatory. Two Rayleigh analyses will be done, one in the right ascension and one in the azimuth angle distribution, to obtain the dipolar modulation of the flux. From the first analysis, we get the component of the dipole vector in the equatorial plane. From the second one, we find the component of the dipole vector perpendicular to the equatorial plane.