The Central Molecular Zone ( CMZ ) , covering the inner \sim 1 \arcdeg of the Galactic plane has been mapped at 2 mm using the GISMO bolometric camera on the 30 m IRAM telescope .
The 21 ^ { \prime \prime } resolution maps show abundant emission from cold molecular clouds , from star forming regions , and from one of the Galactic center nonthermal filaments .
In this work we use the Herschel Hi-GAL data to model the dust emission across the Galactic center .
We find that a single-temperature fit can describe the 160 – 500 \micron emission for most lines of sight , if the long-wavelength dust emissivity scales as \lambda ^ { - \beta } with \beta \approx 2.25 .
This dust model is extrapolated to predict the 2 mm dust emission .
Subtraction of the model from the GISMO data provides a clearer look at the 2 mm emission of star-forming regions and the brightest nonthermal filament .