Seyfert galaxies are more common in close pairs of galaxies than in isolated systems, which may be due to interactions between the two galaxies triggering activity in the Seyfert galaxy. Seyfert galaxies also emit more energy at X-ray, ultraviolet, infrared, or radio wavelengths than normal spiral galaxies, which is thought to be due to their active galactic nuclei. However, there is no evidence that Seyfert galaxies generally show redshifts greater than 6.

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Seyfert Galaxies

Question 57

Multiple Choice

Seyfert galaxies

A) are more common in close pairs of galaxies than in isolated systems.
B) emit more energy at X-ray, ultraviolet, infrared, or radio wavelengths than normal spiral galaxies.
C) generally show redshifts greater than 6.
D) are more common in close pairs of galaxies than in isolated systems and emit more energy at X-ray, ultraviolet, infrared, or radio wavelengths than normal spiral galaxies.
E) are more common in close pairs of galaxies than in isolated systems; emit more energy at X-ray, ultraviolet, infrared, or radio wavelengths than normal spiral galaxies; and generally show redshifts greater than 6.

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