Evidence of near body interaction between them such as the two tidal tails of Markarian 279 may support a gravimetric origin for them.
Though they are photographically unremarkable, core temperatures in these bodies are capable of producing tridecavalent oxidation states in iron. One famous one concentrates as much as 28% of its light in its emission spectra around iron. Evidence of near body interaction between them such as the two tidal tails of Markarian 279 may support a gravimetric origin for them. They are classified according to Doppler broadening between the bands of their accretion disks into X-ray and UV-emitting Type I, and Type II, which emit infrared radiation.  FTP, name these radio galaxies characterized by their active nuclei.
Though they are photographically unremarkable, core temperatures in these bodies are capable of producing tridecavalent oxidation states in iron.
Seyfert galaxies