FEEDBACK is a SOFIA legacy project using the upGREAT heterodyne receiver on SOFIA to map the CII 158 micron line and the OI 63 micron line in Galactic molecular clouds. Around 100 h observing time were granted to observe 11 Galactic massive star-forming regions. Observations started in 2019 and will be finished in 2022. Our objective is to study the impact of radiation and winds of massive stars o nthe interstellar medium. More information on FEEDBACK are found at
These interactive images show the CII (ionized carbon) and CO (carbon monoxide molecule) emission of the interstellar bubble RCW120 in spatial and velocity space. The x- and y- axis
are the coordinates in units of pixels, the z-axis is the velocity (units are in channels where channel 15 corresponds to -10 km/s).
The ring structure is well visible in CII but in addition, we observe an expanding bubble in emission of ionized carbon, indicated by the large velocity extention of emission along the z-axis.
The ring structure is also well visible in CO, but there is no indication of an expanding bubble in CO. The extended local velocity feature seen in the map originates from a protostellar soure with a CO outflow.