Galactic Super-Accreting X-ray Binaries as Super-PeVatron Accelerators
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866912505936216064 |
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| author | Wang, Jieshuang Reville, Brian Aharonian, Felix |
| author_facet | Wang, Jieshuang Reville, Brian Aharonian, Felix |
| contents | The extension of the cosmic-ray (CR) spectrum well beyond 1~PeV necessitates the existence of a population of accelerators in the Milky Way, which we refer to as Super PeVatrons. Identifying the nature of these sources remains a challenge to the paradigm of galactic CRs. Galactic super-accreting X-ray binaries, where the compact object accretes at a rate near or above the Eddington limit, can meet the energy requirement to supply the high-energy population of galactic CRs. We demonstrate that the trans-relativistic jets and/or winds of these powerful objects with kinetic energy luminosity exceeding $10^{39} \, \rm erg/s$, can accelerate protons to energies above several PeV. Detection of such super-accreting X-ray binaries through their ultra-high-energy $γ$-ray ``halos" and large-scale nebulae is also discussed. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2507_21048 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | Galactic Super-Accreting X-ray Binaries as Super-PeVatron Accelerators Wang, Jieshuang Reville, Brian Aharonian, Felix High Energy Astrophysical Phenomena Astrophysics of Galaxies Solar and Stellar Astrophysics The extension of the cosmic-ray (CR) spectrum well beyond 1~PeV necessitates the existence of a population of accelerators in the Milky Way, which we refer to as Super PeVatrons. Identifying the nature of these sources remains a challenge to the paradigm of galactic CRs. Galactic super-accreting X-ray binaries, where the compact object accretes at a rate near or above the Eddington limit, can meet the energy requirement to supply the high-energy population of galactic CRs. We demonstrate that the trans-relativistic jets and/or winds of these powerful objects with kinetic energy luminosity exceeding $10^{39} \, \rm erg/s$, can accelerate protons to energies above several PeV. Detection of such super-accreting X-ray binaries through their ultra-high-energy $γ$-ray ``halos" and large-scale nebulae is also discussed. |
| title | Galactic Super-Accreting X-ray Binaries as Super-PeVatron Accelerators |
| topic | High Energy Astrophysical Phenomena Astrophysics of Galaxies Solar and Stellar Astrophysics |
| url | https://arxiv.org/abs/2507.21048 |