Which sources accelerate cosmic rays above 10^19 eV? · revision history

Revision 2

Accepted · core change · record

Changes against revision 1:

Title · changed
Revision 1: Which sources accelerate cosmic rays above $1e19\,\mathrm{eV}$?
Revision 2: Which sources accelerate cosmic rays above $10^{19}\,\mathrm{eV}$?
Plain
The most energetic cosmic rays come from outside our galaxy, but magnetic fields bend their paths, so their sources have not been identified.
Precise · changed · core
Revision 1: For $E > 8e18\ \mathrm{eV}$ (Auger large-scale dipole, amplitude $\sim 6.5\ \text{percent}$, pointing away from the Galactic center) and $E > 4e19\ \mathrm{eV}$ (intermediate-scale excesses near Centaurus A and starburst galaxies for Auger, the hotspot for Telescope Array), identify the source population (AGN jets, starburst galaxies, gamma-ray bursts, tidal disruption events, magnetars). Answer: a source class whose emissivity, maximum rigidity and composition reproduce the spectrum, the shower-depth ($X_{\mathrm{max}}$) distributions and the arrival-direction anisotropies after propagation through Galactic and extragalactic magnetic fields.
Revision 2: For $E > 8 \times 10^{18}\ \mathrm{eV}$ (Auger large-scale dipole, amplitude $\sim 6.5\%$, pointing away from the Galactic center) and $E > 4 \times 10^{19}\ \mathrm{eV}$ (intermediate-scale excesses near Centaurus A and starburst galaxies for Auger, the hotspot for Telescope Array), identify the source population (AGN jets, starburst galaxies, gamma-ray bursts, tidal disruption events, magnetars). Answer: a source class whose emissivity, maximum rigidity and composition reproduce the spectrum, the shower-depth ($X_{\max}$) distributions and the arrival-direction anisotropies after propagation through Galactic and extragalactic magnetic fields.
Settled by · changed · core
Revision 1: Per-event mass estimates above $4e19\,\mathrm{eV}$ (AugerPrime) allowing light nuclei to be traced back, together with a $5\sigma$ intermediate-scale anisotropy associated with a source catalog.
Revision 2: Per-event mass estimates above $4 \times 10^{19}\,\mathrm{eV}$ (AugerPrime) allowing light nuclei to be traced back, together with a $5\sigma$ intermediate-scale anisotropy associated with a source catalog.
Kind
phenomenon
Answer type
identification
References
(empty)
Literature status
open
Status note · changed
Revision 1: 2023: Telescope Array reported a $2.4e20\ \mathrm{eV}$ event (Amaterasu) whose arrival direction points toward the Local Void with no plausible nearby source.
Revision 2: 2023: Telescope Array reported a $2.4 \times 10^{20}\ \mathrm{eV}$ event (Amaterasu) whose arrival direction points toward the Local Void with no plausible nearby source.
Posed since
(empty)

Decisions