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Seyfert galaxy

/ˌseɪfəːt ˈɡaləksi/

noun
- 1. a galaxy of a type characterized by a bright compact core that shows strong infrared emission.
Word Origin named after Carl K. Seyfert (1911–60), American astronomer.
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Seyfert galaxy
Class of galaxies
Seyfert galaxies are one of the two largest groups of active galaxies, along with quasar host galaxies. They have quasar-like nuclei (very luminous sources of electromagnetic radiation that are outside of our own galaxy) with very high surface brightnesses whose spectra reveal strong, high-ionisation emission lines, but unlike quasars, their host galaxies are clearly detectable. Wikipedia
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