Channel maps of the 12CO (2–1) emission in the Orion A cloud (red contours; Nishimura et al. 2015) for LSR velocities between −1 and 17 km s-1 in channels of 1 km s-1 and contours every 0.6 K km s-1. The maps cover Galactic latitudes between b = [−21,−17.5] deg, similar to those used to produce Fig. 1. Each channel map includes the position of the APOGEE-YSOs with RVs within the same velocity range (solid squares). There is a correlation between distribution of gas traced in CO and the young APOGEE sources with Spitzer counterparts both in space and velocity.
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