Home → MYTorus Examples → NGC 4507

# MYTorus fit to NGC 4507 Suzaku data

MYTorus fits to Suzaku data for the Seyfert 2 galaxy NGC 4507 show that the line-of-sight column density is $\sim 8 \times 10^{23} \ {\rm cm^{-2}}$, but the global average column density is only $\sim 2 \times 10^{23} \ {\rm cm^{-2}}$. This Compton-thin continuum component can be seen in blue (labeled CS) in panel (a). It is also clear that the Compton-thin component is the dominant continuum component between $\sim 3-4$ keV. Standard disk-reflection models cannot model this component because the column density in those models is simply assumed to be infinite. The line-of-sight, direct (unscattered, or zeroth-order) contininuum component is shown in orange in panel (a), and labeled as “Z.” Note that the Fe K$\alpha$ and Fe K$\beta$ emission lines are self-consistently calculated and give an excellent fit to the data. It follows from what has been said above, that these emission lines originate in Compton-thin matter in this AGN. This could not be deduced by applying ad hoc disk-reflection models such as pexrav or pexmon.