DR20 integrated intensity maps

We then focus on the first observed subregion in Cygnus X, namely the DR20 star formation site, which comprises sources in a range of evolutionary stages from cold pristine gas clumps to more evolved ultracompact HII regions. The data covering cloud to cores scales at a linear spatial resolution of <5000au reveal several kinematic cloud components that may be part of several large-scale flows around the central cores. The temperature structure of the region is investigated by means of the HCN/HNC intensity ratio and compared to dust-derived temperatures.

We find that the deuterated DCO^+^ emission is almost exclusively located toward regions at low temperatures below 20K. Investigating the slopes of spatial power spectra of dense gas tracer intensity distributions (HCO+, H13CO+, and N2H+), we find comparatively flat slopes between ~2.9 and ~2.6, consistent with high Mach numbers and/or active star formation in DR20. This MIOP large program on star formation in Cygnus X provides unique new data connecting cloud with core scales.

The analysis of the DR20 data presented here highlights the potential of this program to investigate in detail the different physical and chemical aspects and their interrelations from the scale of the natal molecular cloud down to the scale of accretion onto the individual protostellar cores.