GeV γ-ray emission in the low-mass star-forming region AFGL 490
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arXiv
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| Autori principali: | , , |
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| Natura: | Preprint |
| Pubblicazione: |
2026
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| _version_ | 1866914568764129280 |
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| author | Yang, Li-Nuo Tang, Sheng Tam, Pak-Hin Thomas |
| author_facet | Yang, Li-Nuo Tang, Sheng Tam, Pak-Hin Thomas |
| contents | We report the discovery of an extended GeV γ-ray source, 4FGL J0330.7+5845e, associated with the star-forming region AFGL 490 using 17 years of Fermi-LAT data. The emission is spatially coincident with a dense molecular cloud and centered near the massive protostar AFGL 490. Its spectral energy distribution shows a distinct high-energy cutoff. Both leptonic and hadronic models can fit the γ-ray spectrum, but energetic arguments rule out stellar winds as the primary accelerator. Instead, the protostellar jet driven by AFGL 490 is identified as a plausible site for particle acceleration, and the derived timescales and maximum particle energies are consistent with theoretical predictions for such jets. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2605_15489 |
| institution | arXiv |
| publishDate | 2026 |
| record_format | arxiv |
| spellingShingle | GeV γ-ray emission in the low-mass star-forming region AFGL 490 Yang, Li-Nuo Tang, Sheng Tam, Pak-Hin Thomas High Energy Astrophysical Phenomena We report the discovery of an extended GeV γ-ray source, 4FGL J0330.7+5845e, associated with the star-forming region AFGL 490 using 17 years of Fermi-LAT data. The emission is spatially coincident with a dense molecular cloud and centered near the massive protostar AFGL 490. Its spectral energy distribution shows a distinct high-energy cutoff. Both leptonic and hadronic models can fit the γ-ray spectrum, but energetic arguments rule out stellar winds as the primary accelerator. Instead, the protostellar jet driven by AFGL 490 is identified as a plausible site for particle acceleration, and the derived timescales and maximum particle energies are consistent with theoretical predictions for such jets. |
| title | GeV γ-ray emission in the low-mass star-forming region AFGL 490 |
| topic | High Energy Astrophysical Phenomena |
| url | https://arxiv.org/abs/2605.15489 |