Seyfert galaxies are spiral or irregular galaxies containing an extremely bright nucleus, most likely caused by a supermassive fl hole, that can sometimes outshine the surrounding galaxy.
Seyfert galaxies are characterized by extremely bright nuclei, and spectra which have very bright emission lines of hydrogen, helium, nitrogen, and oxygen.
In some Type 2 Seyfert galaxies, the broad component can be observed in polarized light; it is believed that light from the broad-line region is scattered by a hot, gaseous halo surrounding the nucleus, allowing us to view it indirectly.
CarlKeenanSeyfert was born on February 11, 1911 as the son of a pharmacist in Cleveland, Ohio,, where he also got his school education.
Seyfert was a member in several professional societies, including the American Astronomical Society, where he served on the Council from 1955 to 1958, and the British Royal Astronomical Society.
CarlSeyfert died on June 13, 1960 in Nashville; Tennessee, in an automobile accident, aged 49.
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