Galactic magnetic deflections of UHECRs including realistic random fields

Cosmic Ray Anisotropy Workshop 2013

Keivani, Azadeh^1 ; Farrar, Glennys^2 ; Sutherland, Michael^1,3,4 ; Matthews, James^1

Department of Physics and Astronomy, Louisiana State University, Baton Rouge, LA, United States^1

Center for Cosmology and Particle Physics, New York University, New York, NY, United States^2

Department of Physics, Ohio State University, Columbus, OH, United States^3

Center for Cosmology and AstroParticle Physics, Ohio State University, Columbus, OH, United States^4

关键词: Arrival direction;    Galactic magnetic fields;    Magnetic deflection;    Primary particles;    Ray deflections;    Synchrotron emission;    Turbulent magnetic fields;    Ultra high-energy cosmic rays;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/531/1/012003/pdf
DOI  :  10.1088/1742-6596/531/1/012003

来源: IOP

【 摘 要 】

We present the results of a study that simulates trajectories of ultra-high energy cosmic rays from Centaurus A to Earth. The arrival directions are characterized to assess whether Cen A can be identified as a source of cosmic rays based on observing departures from isotropy. We analyze separately particles originating from the central engine as well as from the north and south radio lobes of the Cen A complex. Simulations are performed for particle rigidities from E/Z 2 = EV to 100 EV, thus covering the possibility of primary particles as heavy as Fe nuclei with energies exceeding 50 EeV. The Galactic magnetic field is modeled using the recent work of Jansson and Farrar (JF12) which fitted its parameters to match extragalactic Faraday rotation measures and WMAP7 synchrotron emission maps. We also discuss the effects of an additional turbulent magnetic field on the cosmic ray deflections.