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Signatures of anisotropic diffusion around PeVatrons in 100 TeV gamma-ray data
- Source :
- Phys.Rev.D, Phys.Rev.D, 2022, 106 (12), pp.123029. ⟨10.1103/PhysRevD.106.123029⟩
- Publication Year :
- 2022
- Publisher :
- arXiv, 2022.
-
Abstract
- The Tibet AS$\gamma$ collaboration has reported a diffuse $\gamma$-ray emission signal from the Galactic Plane. We consider the possibility that the diffuse emission from the outer Galactic Plane at the highest energies is produced by cosmic rays spreading from a single supernova-type source either in the Local or Perseus arm of the Milky Way. We show that anisotropic diffusion of multi-PeV cosmic rays along the Galactic magnetic field can produce an extended source spanning ten(s) of degrees on the sky, with a flux-per-unit-solid-angle consistent with Tibet AS$\gamma$ measurements. Observations of this new type of very extended sources, and measurements of their morphologies, can be used to characterize the anisotropic diffusion of PeV cosmic rays in the Galactic magnetic field, and to constrain the locations and properties of past PeVatrons.<br />Comment: 7 pages, 3 figures
- Subjects :
- High Energy Astrophysical Phenomena (astro-ph.HE)
Astrophysics::High Energy Astrophysical Phenomena
diffusion
disk
Astrophysics::Instrumentation and Methods for Astrophysics
FOS: Physical sciences
magnetic field: galaxy
anisotropy
Astrophysics::Cosmology and Extragalactic Astrophysics
cosmic radiation
gamma ray
supernova
emission
TeV
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Astrophysics - High Energy Astrophysical Phenomena
[PHYS.ASTR] Physics [physics]/Astrophysics [astro-ph]
signature
Astrophysics::Galaxy Astrophysics
Subjects
Details
- Database :
- OpenAIRE
- Journal :
- Phys.Rev.D, Phys.Rev.D, 2022, 106 (12), pp.123029. ⟨10.1103/PhysRevD.106.123029⟩
- Accession number :
- edsair.doi.dedup.....b71025376d3c1a68b57cc512051dd0b4
- Full Text :
- https://doi.org/10.48550/arxiv.2203.11052