Abstract
In this paper, we report the detection of the very-high-energy (VHE, ) and ultra-high-energy (UHE, ) -ray emissions from the direction of the young star-forming region W43, observed by the Large High Altitude Air Shower Observation (LHAASO). The extended -ray source was detected with a significance of by KM2A and by WCDA, respectively. The angular extension of this -ray source is about 0.5 degrees, corresponding to a physical size of about 50 pc. We discuss the origin of the -ray emission and possible cosmic ray acceleration in the W43 region using multi-wavelength data. Our findings suggest that W43 is likely another young star cluster capable of accelerating cosmic rays (CRs) to at least several hundred TeV.
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