Flaring gamma-ray emission coincident with a hyperactive fast radio burst source
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arXiv
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| Main Authors: | , , , , |
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| Format: | Preprint |
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2024
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| _version_ | 1866916477042425856 |
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| author | Xing, Yi Yu, Wenfei Yan, Zhen Zhang, Xian Zhang, Bing |
| author_facet | Xing, Yi Yu, Wenfei Yan, Zhen Zhang, Xian Zhang, Bing |
| contents | Fast radio bursts (FRBs) are bright milliseconds-duration radio bursts from cosmological distances. Despite intense observational and theoretical studies, their physical origin is still mysterious. One major obstacle is the lack of identification of multi-wavelength counterparts for FRBs at cosmological distances. So far, all the searches other than in the radio wavelength, including those in the gamma-ray energies, have only left upper limits. Here we report a gigaelectronvolt (GeV) gamma-ray flare lasting 15.6 seconds as well as additional evidence of variable gamma-ray emission in temporal and spatial association with the hyper-active, newly discovered repeating FRB 20240114A, which has been localized to a dwarf galaxy at a redshift of 0.13. The energetic, short GeV gamma-ray flare reached a prompt isotropic luminosity of the order of ${10}^{48}~{\rm ergs~{s}^{-1}}$. The additional less-significant gamma-ray flares, if true, also have similar luminosities; such flares could contribute to a 5-day average luminosity of the order of ${10}^{45}~{\rm ergs~{s}^{-1}}$. These high-luminosity flares challenge the traditional FRB engine scenario involving a seconds-period magnetar. Rather, it suggests a powerful, long-lived, but newborn energy source at the location of this active repeater, either directly powering the bursts or indirectly triggering bursts in the vicinity of the FRB engine. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2411_06996 |
| institution | arXiv |
| publishDate | 2024 |
| record_format | arxiv |
| spellingShingle | Flaring gamma-ray emission coincident with a hyperactive fast radio burst source Xing, Yi Yu, Wenfei Yan, Zhen Zhang, Xian Zhang, Bing High Energy Astrophysical Phenomena Fast radio bursts (FRBs) are bright milliseconds-duration radio bursts from cosmological distances. Despite intense observational and theoretical studies, their physical origin is still mysterious. One major obstacle is the lack of identification of multi-wavelength counterparts for FRBs at cosmological distances. So far, all the searches other than in the radio wavelength, including those in the gamma-ray energies, have only left upper limits. Here we report a gigaelectronvolt (GeV) gamma-ray flare lasting 15.6 seconds as well as additional evidence of variable gamma-ray emission in temporal and spatial association with the hyper-active, newly discovered repeating FRB 20240114A, which has been localized to a dwarf galaxy at a redshift of 0.13. The energetic, short GeV gamma-ray flare reached a prompt isotropic luminosity of the order of ${10}^{48}~{\rm ergs~{s}^{-1}}$. The additional less-significant gamma-ray flares, if true, also have similar luminosities; such flares could contribute to a 5-day average luminosity of the order of ${10}^{45}~{\rm ergs~{s}^{-1}}$. These high-luminosity flares challenge the traditional FRB engine scenario involving a seconds-period magnetar. Rather, it suggests a powerful, long-lived, but newborn energy source at the location of this active repeater, either directly powering the bursts or indirectly triggering bursts in the vicinity of the FRB engine. |
| title | Flaring gamma-ray emission coincident with a hyperactive fast radio burst source |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2411.06996 |