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Figure 5. Images of the Free-Free emission from a Galactic HII region from the GLOSTAR survey at 6 GHz with 1” resolution (left), and in the mid-IR (right; Dzib et al. 2022, arXiv:2210:00560).
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The NSF National Radio Astronomy Observatory and NSF Green Bank Observatory are facilities of the U.S. National Science Foundation operated under cooperative agreement by Associated Universities, Inc.

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