The central region of spiral galaxies as seen by<i>Herschel</i>
The central region of spiral galaxies as seen by<i>Herschel</i>
With appropriate spatial resolution, images of spiral galaxies in thermal infrared (~10 <i>μ<i/>m and beyond) often reveal a bright central component, distinct from the stellar bulge, superimposed on a disk with prominent spiral arms. ISO and <i>Spitzer<i/> studies have shown that much of the scatter in the mid-infrared colors of …