Detection of the Extended γ-Ray Emission around TeV Source 1LHAASO J0249+6022 with Fermi-LAT
1LHAASO J0249+6022 is an extended very-high-energy γ -ray source discovered by the Large High-Altitude Air Shower Observatory. Based on nearly 16.1 yr of data from the Fermi Large Area Telescope, we report the probable γ -ray emission from 1LHAASO J0249+6022 in the 0.03–1 TeV energy range. The resul...
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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/adadfc |
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| author | Yunlu Gong Liancheng Zhou Qi Xia Shan Chang Jun Fang Li Zhang |
| author_facet | Yunlu Gong Liancheng Zhou Qi Xia Shan Chang Jun Fang Li Zhang |
| author_sort | Yunlu Gong |
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| description | 1LHAASO J0249+6022 is an extended very-high-energy γ -ray source discovered by the Large High-Altitude Air Shower Observatory. Based on nearly 16.1 yr of data from the Fermi Large Area Telescope, we report the probable γ -ray emission from 1LHAASO J0249+6022 in the 0.03–1 TeV energy range. The results show that its γ -ray spectrum can be well fitted by a single power law with an index of 1.54 ± 0.17, and integral photon flux is (4.28 ± 1.03) × 10 ^−11 photons cm ^−2 s ^−1 . We also considered theoretically whether the nonthermal emission could originate from a pulsar wind nebula (PWN) scenario. Assuming that the particles injected into the nebula have a power-law distribution, the resulting spectrum from the inverse Compton scattering is consistent with the detected GeV and TeV γ -ray fluxes. Our study shows that the PWN scenario is reasonable for 1LHAASO J0249+6022. |
| 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-1872a46ffdb140efbeb7b562bb31a7932025-02-12T07:13:03ZengIOP PublishingThe Astrophysical Journal1538-43572025-01-01980216010.3847/1538-4357/adadfcDetection of the Extended γ-Ray Emission around TeV Source 1LHAASO J0249+6022 with Fermi-LATYunlu Gong0https://orcid.org/0000-0003-3326-2173Liancheng Zhou1Qi Xia2Shan Chang3https://orcid.org/0000-0001-9591-4961Jun Fang4https://orcid.org/0000-0001-8043-0745Li Zhang5Department of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; [email protected], [email protected] of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; [email protected], [email protected] of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; [email protected], [email protected] of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; [email protected], [email protected] of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; [email protected], [email protected] of Astronomy, School of Physics and Astronomy, Key Laboratory of Astroparticle Physics of Yunnan Province, Yunnan University , Kunming 650091, People’s Republic of China ; [email protected], [email protected] J0249+6022 is an extended very-high-energy γ -ray source discovered by the Large High-Altitude Air Shower Observatory. Based on nearly 16.1 yr of data from the Fermi Large Area Telescope, we report the probable γ -ray emission from 1LHAASO J0249+6022 in the 0.03–1 TeV energy range. The results show that its γ -ray spectrum can be well fitted by a single power law with an index of 1.54 ± 0.17, and integral photon flux is (4.28 ± 1.03) × 10 ^−11 photons cm ^−2 s ^−1 . We also considered theoretically whether the nonthermal emission could originate from a pulsar wind nebula (PWN) scenario. Assuming that the particles injected into the nebula have a power-law distribution, the resulting spectrum from the inverse Compton scattering is consistent with the detected GeV and TeV γ -ray fluxes. Our study shows that the PWN scenario is reasonable for 1LHAASO J0249+6022.https://doi.org/10.3847/1538-4357/adadfcGamma-ray astronomySpectral energy distributionPulsar wind nebulaeAstronomy data analysis |
| spellingShingle | Yunlu Gong Liancheng Zhou Qi Xia Shan Chang Jun Fang Li Zhang Detection of the Extended γ-Ray Emission around TeV Source 1LHAASO J0249+6022 with Fermi-LAT The Astrophysical Journal Gamma-ray astronomy Spectral energy distribution Pulsar wind nebulae Astronomy data analysis |
| title | Detection of the Extended γ-Ray Emission around TeV Source 1LHAASO J0249+6022 with Fermi-LAT |
| title_full | Detection of the Extended γ-Ray Emission around TeV Source 1LHAASO J0249+6022 with Fermi-LAT |
| title_fullStr | Detection of the Extended γ-Ray Emission around TeV Source 1LHAASO J0249+6022 with Fermi-LAT |
| title_full_unstemmed | Detection of the Extended γ-Ray Emission around TeV Source 1LHAASO J0249+6022 with Fermi-LAT |
| title_short | Detection of the Extended γ-Ray Emission around TeV Source 1LHAASO J0249+6022 with Fermi-LAT |
| title_sort | detection of the extended γ ray emission around tev source 1lhaaso j0249 6022 with fermi lat |
| topic | Gamma-ray astronomy Spectral energy distribution Pulsar wind nebulae Astronomy data analysis |
| url | https://doi.org/10.3847/1538-4357/adadfc |
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