GeV γ-ray emission in the low-mass star-forming region AFGL 490

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ID: 314570
2026
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Abstract
Abstract 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.
Reference Key
openalex_W7161948131 Use this key to autocite in the manuscript while using SciMatic Manuscript Manager or Thesis Manager
Authors Li-Nuo Yang, S Tang, Pak-Hin Thomas Tam
Journal monthly notices of the royal astronomical society
Year 2026
DOI
10.1093/mnras/stag896
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