Spatial distribution of the APOGEE strings in the Orion A cloud: (Background) Herschel column density map (Lombardi et al. 2014); (black points) APOGEE sources; (colored segments) APOGEE strings. The white contour encloses those regions with equivalent column densities of AV = 5 mag. The positions of the most prominent clusters in the cloud are labeled in the figure.
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