All of them contain core temperatures high enough to produce tridecavalent iron,
Two indicators of these systems are the K-sub-5 band and the [Om]A5007 emission line, and complex X-ray variability below 2KeV indicates that high accretion rates in some examples support ionized reprocessors. All of them contain core temperatures high enough to produce tridecavalent iron, (*) while emission from these bodies in the radio spectrum is due to synchrotron emission from their cores. Doppler broadening between the bands of their accretion disks provides one method of classifying them, though the unified classification is based upon hydrogen emission in the either infrared or UV, and is composed of Type I and Type II examples. For 10 points, name these intermediate systems between galaxies and quasars, which are radio galaxies that contain extremely active central nuclei, named for an American astronomer.
Two indicators of these systems are the K-sub-5 band and the [Om]A5007 emission line, and complex X-ray variability below 2KeV indicates that high accretion rates in some examples support ionized reprocessors.
{Seyfert} galaxies [Prompt on {galaxies} or {spiral galaxies} early; prompt on {Active Galactic Nuclei} before “{cores.}”]