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Author: WikiMatrix
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English[en]
It is not known for sure that the UV radiation is produced purely by star-formation, and some astronomers believe ULIRGs to be powered (at least in part) by active galactic nuclei (AGN).
Galician[gl]
Non se sabe seguro se a radiación ultravioleta se produce só pola formación de estrelas, e algúns astrónomos cren que os ULIRGs están alimentados (polo menos en parte) por núcleos galácticos activos (AGN).