Constraints on the origins of the Galactic neutrino flux
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2023
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| _version_ | 1866909186121531392 |
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| author | Desai, Abhishek Vandenbroucke, Justin Anandagoda, Samalka Thwaites, Jessie Romfoe, M. J. |
| author_facet | Desai, Abhishek Vandenbroucke, Justin Anandagoda, Samalka Thwaites, Jessie Romfoe, M. J. |
| contents | Galactic and extragalactic objects in the universe are sources of high-energy neutrinos {that may contribute to the astrophysical neutrino signal seen by IceCube.} Recently, a study done using cascade-like events seen by IceCube reported neutrino emission from the Galactic plane with $>$4$σ$ significance. In this work, we put a lower limit on the number of Galactic sources required to explain this emission. To achieve this, we {use} a simulation package created to simulate point sources in the Galaxy along with the neutrino and gamma-ray flux emissions originating from them. Along with {using} past IceCube discovery potential curves, we also account for Eddington bias effects due to Poisson fluctuations in the number of detected neutrino events.{We present a toy Monte Carlo simulation to show that there should be at least 8 sources, each with luminosities $1.6 \times 10^{35}$erg/s responsible for the Galactic neutrino emission. } Our results constrain the number of individual point-like emission regions, which applies both to discrete astrophysical sources and to individual points of diffuse emission. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2306_17305 |
| institution | arXiv |
| publishDate | 2023 |
| record_format | arxiv |
| spellingShingle | Constraints on the origins of the Galactic neutrino flux Desai, Abhishek Vandenbroucke, Justin Anandagoda, Samalka Thwaites, Jessie Romfoe, M. J. High Energy Astrophysical Phenomena Galactic and extragalactic objects in the universe are sources of high-energy neutrinos {that may contribute to the astrophysical neutrino signal seen by IceCube.} Recently, a study done using cascade-like events seen by IceCube reported neutrino emission from the Galactic plane with $>$4$σ$ significance. In this work, we put a lower limit on the number of Galactic sources required to explain this emission. To achieve this, we {use} a simulation package created to simulate point sources in the Galaxy along with the neutrino and gamma-ray flux emissions originating from them. Along with {using} past IceCube discovery potential curves, we also account for Eddington bias effects due to Poisson fluctuations in the number of detected neutrino events.{We present a toy Monte Carlo simulation to show that there should be at least 8 sources, each with luminosities $1.6 \times 10^{35}$erg/s responsible for the Galactic neutrino emission. } Our results constrain the number of individual point-like emission regions, which applies both to discrete astrophysical sources and to individual points of diffuse emission. |
| title | Constraints on the origins of the Galactic neutrino flux |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2306.17305 |