Image Details
Caption: Figure 2.
A visual representation of ACES catalog sources at various steps in the pruning process. The image shown in each panel is a zoom-in of the ACES 3 mm continuum mosaic toward a group of nonthermal filaments collectively known as the “Galactic Center Radio Arc” (F. Yusef-Zadeh et al. 1986) and an extended H II region known as “the Sickle” (e.g., F. Yusef-Zadeh & M. Morris 1987), which is likely ionized by stars in the nearby Quintuplet Cluster. In all three panels, ACES detections are shown with cyan ellipses. The left panel shows the sources before manual source removal, the middle panel shows the “full” catalog sources, and the right panel shows “filtered” catalog sources. We note that there are some known compact sources such as the Pistol Star and some evolved stars from the Quintuplet Cluster that are a part of the “full” catalog, but not the “filtered” catalog, due to the strict thresholds we set for extended free–free contamination in Section 3.6.
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© 2026. The Author(s). Published by the American Astronomical Society.
