An extragalactic gamma-ray binary formed in supernova 2022jli
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arXiv
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| Autores principales: | , , |
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| Formato: | Preprint |
| Publicado: |
2025
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| _version_ | 1866909953381367808 |
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| author | Zhang, Pengfei Wang, Zhongxiang Ji, Shunhao |
| author_facet | Zhang, Pengfei Wang, Zhongxiang Ji, Shunhao |
| contents | On May 5 2022, a type Ic supernova (SN) explosion SN~2022jli was discovered. This SN showed additional optical emissions, which were found to exhibit 12.4-day periodic undulations and concordant periodic velocity shifts. These key features likely indicate a compact object in a binary system was formed. A faint $γ$-ray source was also detected at the position of the SN and upon checking the $γ$-ray photons' arrival times, it was revealed that the same 12.4-day periodicity was likely present. Here we report our detailed analysis results for the $γ$-ray source. Not only was the $γ$-ray emission detectable for $\sim$1.5\,years since the discovery time, but a strong modulation at period 12.5\,day was also clearly determined. Considering the newly formed compact object to be a neutron star or a stellar-mass black hole, the putative binary, having an orbital period of 12.5\,day, is likely the first extragalactic high-energy system detected. The system may serve as a valuable example for the formation of many such binaries observed in the Milky Way and nearby galaxies. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2512_09223 |
| institution | arXiv |
| publishDate | 2025 |
| record_format | arxiv |
| spellingShingle | An extragalactic gamma-ray binary formed in supernova 2022jli Zhang, Pengfei Wang, Zhongxiang Ji, Shunhao High Energy Astrophysical Phenomena On May 5 2022, a type Ic supernova (SN) explosion SN~2022jli was discovered. This SN showed additional optical emissions, which were found to exhibit 12.4-day periodic undulations and concordant periodic velocity shifts. These key features likely indicate a compact object in a binary system was formed. A faint $γ$-ray source was also detected at the position of the SN and upon checking the $γ$-ray photons' arrival times, it was revealed that the same 12.4-day periodicity was likely present. Here we report our detailed analysis results for the $γ$-ray source. Not only was the $γ$-ray emission detectable for $\sim$1.5\,years since the discovery time, but a strong modulation at period 12.5\,day was also clearly determined. Considering the newly formed compact object to be a neutron star or a stellar-mass black hole, the putative binary, having an orbital period of 12.5\,day, is likely the first extragalactic high-energy system detected. The system may serve as a valuable example for the formation of many such binaries observed in the Milky Way and nearby galaxies. |
| title | An extragalactic gamma-ray binary formed in supernova 2022jli |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2512.09223 |