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Astronomer's Toolbox
Active Galaxies: Quiz
Active Galaxies Quiz
What kind of object is believed to be in the center of an active galaxy?
[A] A radio telescope
[B] A massive black hole
[C] The Loch Ness monster
What features did Carl Seyfert observe in NGC 4151?
[A] It contained H-alpha and H-beta lines
[B] NGC 4151 had a bright point-like nucleus
[C] It had the continuum lines from normal stars
[D] All of the above
It is possible to have a 10
9
solar-mass black hole.
[A] True
[B] False
[C] We don't know
What produces the phenomena observed in AGN?
[A] A massive black hole plus an accretion disk
[B] Grey-headed trolls
[C] The solar cycle
What is the source of many of the apparent differences in the types of AGN we observe?
[A] The size of the central black hole
[B] How far away the galaxy is
[C] The difference in our viewing angle of the accretion disk
