UHECR propagation from Centaurus A
Abstract
In the light of the recently predicted isotopic composition of the kpc-scale jet in Centaurus A, we re-investigate whether this source could be responsible for some of the ultra-high energy cosmic rays detected by the Pierre Auger Observatory. We find that a nearby source like Centaurus A is well motivated by the composition and spectral shape, and that such sources should start to dominate the flux above ∼ 4 EeV. The best-fitting isotopes from our modelling, with the maximum 56Fe energy fixed at 250 EeV, are of intermediate mass, 12C to 16O, while the best-fitting particle index is 2.3.
- Publication:
-
Nuclear and Particle Physics Proceedings
- Pub Date:
- April 2018
- DOI:
- 10.1016/j.nuclphysbps.2018.07.033
- arXiv:
- arXiv:1706.08229
- Bibcode:
- 2018NPPP..297..234W
- Keywords:
-
- ultra-high energy cosmic rays;
- composition;
- galaxies: active;
- galaxies: individual (Centaurus A);
- galaxies: jets;
- Astrophysics - High Energy Astrophysical Phenomena
- E-Print:
- 8 pages, 7 colour figures, 1 table. Submitted to NPPP