21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 19, Problem 44QP
(a)
To determine
The angular size of the material ejected from the supermassive black hole in the nighttime sky in terms of degree.
(b)
To determine
To compare the size with the angular size of the moon.
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Students have asked these similar questions
What are the angular diameters of the following, as seen from Earth?
a. The Sun, with radius R = Rsun = 7x10^5 km.
b. Betelgeuse, with MV = -5.5 mag, mv = 0.8 mag, and R = 650Rsun.
c. The galaxy M31, with R = 30 kpc at a distance D = 0.7Mpc.
d. The Coma cluster of galaxies, with R = 3 Mpc at a distance D = 100 Mpc.
A galaxy with a spherically symmetric distribution of matter has a mass density profile of the type p(r) ∞ 1/r, where r is the radial coordinate from the centre
of the galaxy. To what type of circular velocity (r) does this correspond?
Select one:
a. (r)
O b.
c.
O d.
(r) ~ r
(r) ~ √r
(r): = constant
The supermassive black hole at the center of a galaxy has a mass of 6.5 billion solar masses. If we assume that it is a Schwarzschild black hole, what is the radius of this black hole?
A. 18 light hours
B. 20 light hours
C. 16 light hours
D. 14 light hours
Is the answer A?
S. radius = 3 x 6.5 x 109 x 9.26567-10 = 18.1 light hours
Thanks!
Chapter 19 Solutions
21st Century Astronomy
Ch. 19.1 - Prob. 19.1ACYUCh. 19.1 - Prob. 19.1BCYUCh. 19.2 - Prob. 19.2CYUCh. 19.3 - Prob. 19.3CYUCh. 19.4 - Prob. 19.4CYUCh. 19 - Prob. 1QPCh. 19 - Prob. 2QPCh. 19 - Prob. 3QPCh. 19 - Prob. 4QPCh. 19 - Prob. 5QP
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