Understanding Our Universe
Understanding Our Universe
3rd Edition
ISBN: 9780393614428
Author: PALEN, Stacy, Kay, Laura, Blumenthal, George (george Ray)
Publisher: W.w. Norton & Company,
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Chapter 14.4, Problem 14.4CYU
To determine

Evidences for a supermassive black hole at the centre of the Milky Way.

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According to the unified model of active galactic nuclei, a ___________________ is observed if the accretion disk is tipped slightly and the broad line region emits broad spectral lines.   a. supernova   b. type 1 Seyfert   c. type 2 Seyfert   d. hypernova   e. quasar
The traditional theory of the formation of our galaxy CANNOT explain   a. the existence of the disk of the galaxy.   b. the fact that the oldest stars in the galaxy are not metal free.   c. the spherical distribution of the globular clusters.   d. the difference in metal abundance of the population I and II stars.   e. the existence of the nuclear bulge.
5) A black hole in the center of a nearby Galaxy has a Schwarzchild radius of 2.0*10^7 km. How many times more massive than Sagittarius A* (~4*10^6 solar masses) is said black hole ?
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