Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data
The origins of high-energy astrophysical neutrinos remain a mystery despite extensive searches for their sources. We present constraints from seven years of IceCube Neutrino Observatory muon data on the neutrino flux coming from the Galactic plane. This flux is expected from cosmic-ray interactions...
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| Format: | Article |
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American Astronomical Society
2019
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| Online Access: | http://hdl.handle.net/1721.1/120957 https://orcid.org/0000-0003-4186-4182 https://orcid.org/0000-0001-8866-3826 https://orcid.org/0000-0002-6393-0438 https://orcid.org/0000-0001-7909-5812 |
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| author | IceCube Collaboration Arguelles Delgado, Carlos A Axani, Spencer Nicholas Collin, G. H. Conrad, Janet Marie Moulai, Marjon H. |
| author2 | Massachusetts Institute of Technology. Department of Physics |
| author_facet | Massachusetts Institute of Technology. Department of Physics IceCube Collaboration Arguelles Delgado, Carlos A Axani, Spencer Nicholas Collin, G. H. Conrad, Janet Marie Moulai, Marjon H. |
| author_sort | IceCube Collaboration |
| collection | MIT |
| description | The origins of high-energy astrophysical neutrinos remain a mystery despite extensive searches for their sources. We present constraints from seven years of IceCube Neutrino Observatory muon data on the neutrino flux coming from the Galactic plane. This flux is expected from cosmic-ray interactions with the interstellar medium or near localized sources. Two methods were developed to test for a spatially extended flux from the entire plane, both of which are maximum likelihood fits but with different signal and background modeling techniques. We consider three templates for Galactic neutrino emission based primarily on gamma-ray observations and models that cover a wide range of possibilities. Based on these templates and in the benchmark case of an unbroken E [superscript -2.5] power-law energy spectrum, we set 90% confidence level upper limits, constraining the possible Galactic contribution to the diffuse neutrino flux to be relatively small, less than 14% of the flux reported in Aartsen et al. above 1 TeV. A stacking method is also used to test catalogs of known high-energy Galactic gamma-ray sources. |
| first_indexed | 2024-09-23T12:45:47Z |
| format | Article |
| id | mit-1721.1/120957 |
| institution | Massachusetts Institute of Technology |
| last_indexed | 2024-09-23T12:45:47Z |
| publishDate | 2019 |
| publisher | American Astronomical Society |
| record_format | dspace |
| spelling | mit-1721.1/1209572022-09-28T09:55:24Z Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data IceCube Collaboration Arguelles Delgado, Carlos A Axani, Spencer Nicholas Collin, G. H. Conrad, Janet Marie Moulai, Marjon H. Massachusetts Institute of Technology. Department of Physics Arguelles Delgado, Carlos A Axani, Spencer Nicholas Collin, G. H. Conrad, Janet Marie Moulai, Marjon H. The origins of high-energy astrophysical neutrinos remain a mystery despite extensive searches for their sources. We present constraints from seven years of IceCube Neutrino Observatory muon data on the neutrino flux coming from the Galactic plane. This flux is expected from cosmic-ray interactions with the interstellar medium or near localized sources. Two methods were developed to test for a spatially extended flux from the entire plane, both of which are maximum likelihood fits but with different signal and background modeling techniques. We consider three templates for Galactic neutrino emission based primarily on gamma-ray observations and models that cover a wide range of possibilities. Based on these templates and in the benchmark case of an unbroken E [superscript -2.5] power-law energy spectrum, we set 90% confidence level upper limits, constraining the possible Galactic contribution to the diffuse neutrino flux to be relatively small, less than 14% of the flux reported in Aartsen et al. above 1 TeV. A stacking method is also used to test catalogs of known high-energy Galactic gamma-ray sources. 2019-03-14T17:20:45Z 2019-03-14T17:20:45Z 2017-10 2017-07 2019-03-14T14:43:23Z Article http://purl.org/eprint/type/JournalArticle 1538-4357 http://hdl.handle.net/1721.1/120957 Aartsen, M. G. et al. “Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data.” The Astrophysical Journal 849, 1 (October 2017): 67 © 2017 The American Astronomical Society https://orcid.org/0000-0003-4186-4182 https://orcid.org/0000-0001-8866-3826 https://orcid.org/0000-0002-6393-0438 https://orcid.org/0000-0001-7909-5812 http://dx.doi.org/10.3847/1538-4357/AA8DFB Astrophysical Journal Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use. application/pdf American Astronomical Society The Astrophysical Journal |
| spellingShingle | IceCube Collaboration Arguelles Delgado, Carlos A Axani, Spencer Nicholas Collin, G. H. Conrad, Janet Marie Moulai, Marjon H. Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data |
| title | Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data |
| title_full | Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data |
| title_fullStr | Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data |
| title_full_unstemmed | Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data |
| title_short | Constraints on Galactic Neutrino Emission with Seven Years of IceCube Data |
| title_sort | constraints on galactic neutrino emission with seven years of icecube data |
| url | http://hdl.handle.net/1721.1/120957 https://orcid.org/0000-0003-4186-4182 https://orcid.org/0000-0001-8866-3826 https://orcid.org/0000-0002-6393-0438 https://orcid.org/0000-0001-7909-5812 |
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