Seyfert galaxies are____
A) spiral galaxies with unusually luminous nuclei
B) elliptical galaxies with very broad emission lines
C) explained by the double-exhaust model
D) extremely luminous objects with high redshifts only
E) glowing green gases due to excitation from energy from an active core
Correct Answer:
Verified
Q4: The luminosity of a Seyfert galaxy varies
Q9: The unified model of active galactic nuclei
Q10: The size of a galaxy's central black
Q11: Black holes erupt when matter flows into
Q12: Quasars are isolated supermassive black holes, and
Q13: Matter flowing into a black hole cools
Q16: Double-lobed radio galaxies are an effect of
Q17: Most supermassive black holes are dormant.
Q18: Collisions in the early Universe were rare.
Q19: The broad emission lines of Seyfert galaxies
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