Mid-Infrared Galaxy Classification Based on Silicate Obscuration and PAH Equivalent Width
Mid-Infrared Galaxy Classification Based on Silicate Obscuration and PAH Equivalent Width
We present a new diagnostic diagram for mid-infrared spectra of infrared galaxies based on the equivalent width of the 6.2 μm PAH emission feature and the strength of the 9.7 μm silicate feature. Based on the positions in this diagram, we classify galaxies into nine classes ranging from continuum-dominated AGN …