Search for Neutrino Signals Correlated with LHAASO Diffuse Galactic Emission
The diffuse Galactic γ -ray emission originates from the interactions between cosmic rays and the interstellar medium or radiation fields within our Galaxy, where the production of neutrinos is also anticipated. Recently, the Large High Altitude Air Shower Observatory (LHAASO) reported measurements...
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IOP Publishing
2025-01-01
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| Series: | The Astrophysical Journal |
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| Online Access: | https://doi.org/10.3847/1538-4357/adabe8 |
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| author | Wenlian Li Tian-Qi Huang Donglian Xu Huihai He |
| author_facet | Wenlian Li Tian-Qi Huang Donglian Xu Huihai He |
| author_sort | Wenlian Li |
| collection | DOAJ |
| description | The diffuse Galactic γ -ray emission originates from the interactions between cosmic rays and the interstellar medium or radiation fields within our Galaxy, where the production of neutrinos is also anticipated. Recently, the Large High Altitude Air Shower Observatory (LHAASO) reported measurements of diffuse γ -rays from the Galactic plane with energies ranging from sub-TeV to 1 PeV. Using 7 yr of publicly available IceCube track data with the full detector, we conduct a template search using the γ -ray flux map observed by LHAASO-KM2A as the neutrino emission template and perform a scan search of the Galactic plane. In the template search, a mild excess of neutrinos is observed in the Galactic plane with a pretrial (posttrial) significance of 1.9 σ (1.1 σ ). The measured muon neutrino intensity at 25 TeV is $4.7{3}_{-2.51}^{+2.53}\times 1{0}^{-14}\,{{\rm{TeV}}}^{-1}\,{{\rm{cm}}}^{-2}\,{{\rm{s}}}^{-1}\,{{\rm{sr}}}^{-1}$ , consistent with the expected neutrino flux assuming that all the diffuse Galactic γ -rays originate from hadronic interactions. In the Galactic plane scan search, the most significant location is found at l = 63 $\mathop{.}\limits^{\unicode{x000B0}}$ 57 and b = 0 $\mathop{.}\limits^{\unicode{x000B0}}$ 93 with a pretrial (posttrial) significance of 4.6 σ (1.8 σ ). |
| format | Article |
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| institution | Kabale University |
| issn | 1538-4357 |
| language | English |
| publishDate | 2025-01-01 |
| publisher | IOP Publishing |
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| series | The Astrophysical Journal |
| spelling | doaj-art-cd54d2aacdda4317ace549fa218e1a4a2025-02-12T06:24:05ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01980216410.3847/1538-4357/adabe8Search for Neutrino Signals Correlated with LHAASO Diffuse Galactic EmissionWenlian Li0https://orcid.org/0000-0002-4300-5130Tian-Qi Huang1https://orcid.org/0000-0001-8510-2513Donglian Xu2https://orcid.org/0000-0003-1639-8829Huihai He3https://orcid.org/0000-0002-5963-4281Tsung-Dao Lee Institute, Shanghai Jiao Tong University , 201210 Shanghai, People’s Republic of China ; donglianxu@sjtu.edu.cn; Key Laboratory for Particle Astrophysics and Cosmology (MoE) , Shanghai Key Laboratory for Particle Physics and Cosmology, 200240 Shanghai, People’s Republic of ChinaKey Laboratory of Particle Astrophysics and Experimental Physics Division and Computing Center, Institute of High Energy Physics , Chinese Academy of Sciences, 100049 Beijing, People’s Republic of China; TIANFU Cosmic Ray Research Center , Chengdu, Sichuan, People’s Republic of ChinaTsung-Dao Lee Institute, Shanghai Jiao Tong University , 201210 Shanghai, People’s Republic of China ; donglianxu@sjtu.edu.cn; Key Laboratory for Particle Astrophysics and Cosmology (MoE) , Shanghai Key Laboratory for Particle Physics and Cosmology, 200240 Shanghai, People’s Republic of China; School of Physics and Astronomy, Shanghai Jiao Tong University , 200240 Shanghai, People’s Republic of ChinaKey Laboratory of Particle Astrophysics and Experimental Physics Division and Computing Center, Institute of High Energy Physics , Chinese Academy of Sciences, 100049 Beijing, People’s Republic of China; TIANFU Cosmic Ray Research Center , Chengdu, Sichuan, People’s Republic of China; University of Chinese Academy of Sciences , 100049 Beijing, People’s Republic of ChinaThe diffuse Galactic γ -ray emission originates from the interactions between cosmic rays and the interstellar medium or radiation fields within our Galaxy, where the production of neutrinos is also anticipated. Recently, the Large High Altitude Air Shower Observatory (LHAASO) reported measurements of diffuse γ -rays from the Galactic plane with energies ranging from sub-TeV to 1 PeV. Using 7 yr of publicly available IceCube track data with the full detector, we conduct a template search using the γ -ray flux map observed by LHAASO-KM2A as the neutrino emission template and perform a scan search of the Galactic plane. In the template search, a mild excess of neutrinos is observed in the Galactic plane with a pretrial (posttrial) significance of 1.9 σ (1.1 σ ). The measured muon neutrino intensity at 25 TeV is $4.7{3}_{-2.51}^{+2.53}\times 1{0}^{-14}\,{{\rm{TeV}}}^{-1}\,{{\rm{cm}}}^{-2}\,{{\rm{s}}}^{-1}\,{{\rm{sr}}}^{-1}$ , consistent with the expected neutrino flux assuming that all the diffuse Galactic γ -rays originate from hadronic interactions. In the Galactic plane scan search, the most significant location is found at l = 63 $\mathop{.}\limits^{\unicode{x000B0}}$ 57 and b = 0 $\mathop{.}\limits^{\unicode{x000B0}}$ 93 with a pretrial (posttrial) significance of 4.6 σ (1.8 σ ).https://doi.org/10.3847/1538-4357/adabe8Neutrino astronomyGamma-ray astronomyGalactic cosmic rays |
| spellingShingle | Wenlian Li Tian-Qi Huang Donglian Xu Huihai He Search for Neutrino Signals Correlated with LHAASO Diffuse Galactic Emission The Astrophysical Journal Neutrino astronomy Gamma-ray astronomy Galactic cosmic rays |
| title | Search for Neutrino Signals Correlated with LHAASO Diffuse Galactic Emission |
| title_full | Search for Neutrino Signals Correlated with LHAASO Diffuse Galactic Emission |
| title_fullStr | Search for Neutrino Signals Correlated with LHAASO Diffuse Galactic Emission |
| title_full_unstemmed | Search for Neutrino Signals Correlated with LHAASO Diffuse Galactic Emission |
| title_short | Search for Neutrino Signals Correlated with LHAASO Diffuse Galactic Emission |
| title_sort | search for neutrino signals correlated with lhaaso diffuse galactic emission |
| topic | Neutrino astronomy Gamma-ray astronomy Galactic cosmic rays |
| url | https://doi.org/10.3847/1538-4357/adabe8 |
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