PIRSA:17120007

News from the ultra-high energy cosmic ray sky

APA

Santos, E. (2017). News from the ultra-high energy cosmic ray sky. Perimeter Institute for Theoretical Physics. https://pirsa.org/17120007

MLA

Santos, Edivaldo. News from the ultra-high energy cosmic ray sky. Perimeter Institute for Theoretical Physics, Dec. 12, 2017, https://pirsa.org/17120007

BibTex

          @misc{ scivideos_PIRSA:17120007,
            doi = {10.48660/17120007},
            url = {https://pirsa.org/17120007},
            author = {Santos, Edivaldo},
            keywords = {Cosmology},
            language = {en},
            title = {News from the ultra-high energy cosmic ray sky},
            publisher = {Perimeter Institute for Theoretical Physics},
            year = {2017},
            month = {dec},
            note = {PIRSA:17120007 see, \url{https://scivideos.org/pirsa/17120007}}
          }
          

Edivaldo Santos University of Chicago

Talk numberPIRSA:17120007
Source RepositoryPIRSA
Talk Type Scientific Series
Subject

Abstract

After more than 12 years of continuous data taking, the Pierre Auger Observatory has collected the largest dataset of ultra-high energy cosmic rays (UHECR) to date. The results obtained in the last years include, for example, precise and accurate measurements of the UHECR flux across a few decades in energy, revealing distinctive spectral features that can bring valuable information on different astrophysical processes like: the transition from galactic to extragalactic fluxes; the different energy loss processes to which ultra-relativistic charged particles are subject during their propagation; the energetics of the production and acceleration of particles at the candidate sources. In this talk, I should however focus on a particular observational probe, that is, the small levels of anisotropy in the flux of UHECR at different angular scales: from the small and intermediate ones, important for the identification of possible point sources, to the large angular scales, usually used to search for signs of the galactic to extragalactic transition. In particular, special attention will be devoted to the first observation of a large scale anisotropy signal at energies above 8x10^18 eV recently reported by the collaboration.