Polycyclic Aromatic Hydrocarbons, the Anomalous Microwave Emission, and Their Connection to the Cold Neutral Medium

Brandon S. Hensley, Claire E. Murray, Mark Dodici

Using new large area maps of the cold neutral medium (CNM) fraction, $f_{\mathrm{CNM}}$, we investigate the relationship between the CNM, the abundance of polycyclic aromatic hydrocarbo…