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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Question
Chapter 14, Problem 18QAP
To determine
The size of the volume from which the light comes to us from active galactic nuclei.
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Students have asked these similar questions
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.
Halo population stars have
I. circular orbits in the plane of the galaxy.
II. randomly tipped, elliptical orbits.
III. old stars with low metal content.
IV. young stars with heavy metal content.
a.
I and II
b.
I and III
c.
II and III
d.
II and IV
e.
I and IV
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
Chapter 14 Solutions
Understanding Our Universe
Ch. 14.1 - Prob. 14.1CYUCh. 14.2 - Prob. 14.2CYUCh. 14.3 - Prob. 14.3CYUCh. 14.4 - Prob. 14.4CYUCh. 14 - Prob. 1QAPCh. 14 - Prob. 2QAPCh. 14 - Prob. 3QAPCh. 14 - Prob. 4QAPCh. 14 - Prob. 5QAPCh. 14 - Prob. 6QAP
Ch. 14 - Prob. 7QAPCh. 14 - Prob. 8QAPCh. 14 - Prob. 9QAPCh. 14 - Prob. 10QAPCh. 14 - Prob. 11QAPCh. 14 - Prob. 12QAPCh. 14 - Prob. 13QAPCh. 14 - Prob. 14QAPCh. 14 - Prob. 15QAPCh. 14 - Prob. 16QAPCh. 14 - Prob. 17QAPCh. 14 - Prob. 18QAPCh. 14 - Prob. 19QAPCh. 14 - Prob. 20QAPCh. 14 - Prob. 21QAPCh. 14 - Prob. 22QAPCh. 14 - Prob. 23QAPCh. 14 - Prob. 24QAPCh. 14 - Prob. 25QAPCh. 14 - Prob. 27QAPCh. 14 - Prob. 28QAPCh. 14 - Prob. 29QAPCh. 14 - Prob. 30QAPCh. 14 - Prob. 31QAPCh. 14 - Prob. 32QAPCh. 14 - Prob. 33QAPCh. 14 - Prob. 34QAPCh. 14 - Prob. 35QAPCh. 14 - Prob. 36QAPCh. 14 - Prob. 37QAPCh. 14 - Prob. 38QAPCh. 14 - Prob. 39QAPCh. 14 - Prob. 40QAPCh. 14 - Prob. 41QAPCh. 14 - Prob. 43QAPCh. 14 - Prob. 44QAPCh. 14 - Prob. 45QAP
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Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, physics and related others by exploring similar questions and additional content below.Similar questions
- Consider the following five kinds of objects: open cluster, giant molecular cloud, globular cluster, group of O and B stars, and planetary nebulae. A. Which occur only in spiral arms? B. Which occur only in the parts of the Galaxy other than the spiral arms? C. Which are thought to be very young? D. Which are thought to be very old? E. Which have the hottest stars?arrow_forwardCould the Milky Way ever become an active galaxy? Is it likely to ever be as luminous as a quasar?arrow_forwardDescribe how you might use the color of a galaxy to determine something about what kinds of stars it contains.arrow_forward
- The galactic corona is believed to contain mostly a. O and B stars. b. G, K, and M stars. c. open clusters. d. globular clusters. e. dark matter.arrow_forwardA star at a distance of 50000 light years from the center of a galaxy has an orbital speed of 100 km/s around the galactic center. What is the total mass of the galaxy located at distances smaller than 50000 light years from the center? A. 7.6 ×1010 solar masses B. 4.2 ×1011 solar masses C. 3.5 ×1010 solar masses D. 1.4 ×1011 solar masses Is the answer C? M = (r x v^2) / G = 50000 x 9.46e15 x (100000^2) / 6.67e-11 / 2e30 (the Sun's mass) = 3.55e10 solar massesarrow_forwardWhat triggers the nucleus of a galaxy into activity? a. a nova explosion b. a type I supernova explosion c. a hypernova explosion d. a type II supernova explosion e. none of the abovearrow_forward
- If you want to find a sizeable collection of Population Il stars in the Milky Way Galaxy, where would be a good place to look? A. near the Sun B. in a globular cluster high above the Galaxy's disk C. in the Orion Spur D.on the outer surface of giant molecular clouds E. in an open cluster, especially one with a lot of dust in and around itarrow_forwardStars have the greatest metal content in which region of the Milky Way Galaxy? a. in the galactic halo b. in the nuclear bulge c. in the disk d. in the core e. in the spherical componentarrow_forwardThe lower limit of the mass of the galaxy is a. 100 solar masses. b. 100,000 solar masses. c. 100 million solar masses. d. 100 billion solar masses. e. 100 trillion solar masses.arrow_forward
- An important part of the lifecycle of galaxies like the Milky Way is the self regulation of formation of future generations of stars. Which statement best describes this process? A) Massive stars explode as Supernovae, heating nearby gas which then can't form stars, and even forcing the gas out of the galaxy in asuperbubble. B) Low mass stars like our Sun explode as Supernovae, heating nearby gas which then can't form stars, and even forcing the gas out the galaxy in asuperbubble. C) Stars fuse new elements in their cores which mix with nearby gas clouds, preventing the collapse of the clouds and hence stopping new starformation. D) The stars lock up material in their cores (like White Dwarf and Neutron Stars) meaning they can act as gravitational seeds for future starformation.arrow_forwardGlobular clusters contain no stars more massive than the Sun. Which of the following seems like the least reasonable implication of this observation? Group of answer choices Globular clusters are very old. Globular clusters are very young. Only the low-mass stars are still "alive" in the clusters. Many red giants can probably be found in globular clusters. The very massive stars in the globular clusters have already burnt out.arrow_forward38. Many RR Lyrae stars are found in open clusters in the plane of the galaxy. True Falsearrow_forward
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