Essential Cosmic Perspective
9th Edition
ISBN: 9780135795033
Author: Bennett
Publisher: PEARSON
expand_more
expand_more
format_list_bulleted
Concept explainers
Question
Chapter 18, Problem 42EAP
To determine
To Explain: The gravitational lensing and distorted galaxies.
Expert Solution & Answer
Want to see the full answer?
Check out a sample textbook solution
Students have asked these similar questions
The figure below shows the spectra of two galaxies A and B.
Please can i get help with this questions below:
1. Which of these galaxies has ongoing star formation? How can you tell?2. One of these galaxies has Hubble type E3 while the other is SBb. Which is which? What does the 3 inE3 tell you about the galaxy? What does the SB in SBb tell you about the galaxy?3. What effects would dust have on the two spectra?4. Which galaxy would you expect to have more far-infrared emission? Expl
The Kormendy relation for ellipticals can be written as
He = 20.2+ 3.0 log R.
where R. is the half-light radius (in kpc) and 4e is the surface brightness (in magnitudes per square arc second) at R..
An elliptical galaxy obeying this relation will have a total luminosity
Lo R
for some index 7. What is the correct value of n?
O a. n=-6/5
O b. n= 4/5
T23D
Oc n= 16/5
O d. n cannot be determined with the information we have.
How astronomers determine the distance of a galaxy? Explain.
Chapter 18 Solutions
Essential Cosmic Perspective
Ch. 18 - Prob. 1VSCCh. 18 - Prob. 2VSCCh. 18 - Prob. 3VSCCh. 18 - Prob. 4VSCCh. 18 - Prob. 1EAPCh. 18 - Prob. 2EAPCh. 18 - Prob. 3EAPCh. 18 - Prob. 4EAPCh. 18 - Prob. 5EAPCh. 18 - Prob. 6EAP
Ch. 18 - Prob. 7EAPCh. 18 - Prob. 8EAPCh. 18 - Prob. 9EAPCh. 18 - Prob. 10EAPCh. 18 - Prob. 11EAPCh. 18 - Prob. 12EAPCh. 18 - Prob. 13EAPCh. 18 - Prob. 14EAPCh. 18 - Prob. 15EAPCh. 18 - Prob. 16EAPCh. 18 - Prob. 17EAPCh. 18 - Prob. 18EAPCh. 18 - Prob. 19EAPCh. 18 - Prob. 20EAPCh. 18 - Prob. 21EAPCh. 18 - Prob. 22EAPCh. 18 - Prob. 23EAPCh. 18 - Prob. 24EAPCh. 18 - Prob. 25EAPCh. 18 - Prob. 26EAPCh. 18 - Prob. 27EAPCh. 18 - Prob. 28EAPCh. 18 - Prob. 29EAPCh. 18 - Prob. 30EAPCh. 18 - Prob. 31EAPCh. 18 - Prob. 32EAPCh. 18 - Prob. 33EAPCh. 18 - Prob. 34EAPCh. 18 - Prob. 35EAPCh. 18 - Prob. 36EAPCh. 18 - 37. Dark Matter. Overall, how convincing do you...Ch. 18 - Prob. 39EAPCh. 18 - Dark Energy. Overall, how convincing do you...Ch. 18 - Prob. 41EAPCh. 18 - Prob. 42EAPCh. 18 - Prob. 43EAPCh. 18 - Prob. 44EAPCh. 18 - Prob. 45EAPCh. 18 - Prob. 46EAPCh. 18 - Prob. 47EAPCh. 18 - Prob. 48EAPCh. 18 - Prob. 50EAPCh. 18 - Prob. 51EAPCh. 18 - Prob. 52EAPCh. 18 - Prob. 53EAPCh. 18 - Prob. 54EAP
Knowledge Booster
Learn more about
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
- Suppose the Sagittarius dwarf galaxy merges completely with the Milky Way and adds 150,000 stars to it. Estimate the percentage change in the mass of the Milky Way. Will this be enough mass to affect the orbit of the Sun around the galactic center? Assume that all of the Sagittarius galaxy’s stars end up in the nuclear bulge of the Milky Way Galaxy and explain your answer.arrow_forwardExplain where in a spiral galaxy you would expect to find globular clusters, molecular clouds, and atomic hydrogen.arrow_forwardWhat are the two best ways to measure the distance to a distant, isolated spiral galaxy, and how would it be measured?arrow_forward
- What are the two best ways to measure the distance to a nearby spiral galaxy, and how would it be measured?arrow_forwardCan an elliptical galaxy evolve into a spiral? Explain your answer. Can a spiral turn into an elliptical? How?arrow_forwardWhat are the characteristics of an E7 Galaxy? What about E0 galaxy? Explain.arrow_forward
- Identify a feature of the Whirlpool Galaxy that is visible in all several types of light. Explain what this meansarrow_forwardRead the questions slowly and answer with precise and long details about each of the questions. Answer correctly and follow my guidelines for a long and wonderful review after results. Your target/main observable galaxy is the whirlpool galaxy. Target: Whirlpool Galaxy Object Type: Galaxy Distance: 37 million light-years Constellation: Canes VenaticiDO NOT COPY AND PASTE OTHER WORK OR THINGS FROM THE INTERNET, use your own words. In 500 words, compare and contrast the specific object to at least 2 other objects in its sourceclass (eg. if it's an isolated star, to different types of isolated stars). Explain both observational andphysical differences, as well as what the comparison teaches us about the source class in general.arrow_forwardAs we discussed, clouds are made of a great many small drops. Really - a great many. Imagine a liquid cloud that fills a volume of 1 km3. The clouds contains 100 drops per cubic centimeter; for the sake of argument assume that each is 10 microns (micrometers) in radius. A. How many drops does the cloud contain? Compare this to a big number - say, the number of stars in the galaxy. B. What mass of water does the cloud contain? Compare this to something big - elephants, trucks, that sort of thing. C. What fraction of the cloud volume is filled with condensed water? One way to approach this is to compare the density of the suspended liquid water to the density of the surrounding air. D. How many 1 mm drizzle drops could you make from all the cloud drops? E. How much energy was released when this water condensed from vapor to liquid? If the water condensed in 20 minutes (a reasonable lifetime for a small cloud), what was the (energy per time)? powerarrow_forward
- Assume that the Milky Way has a central bulge of uniform density with a radius R. Also assumethat the gravitational force due to the flat portion of the galaxy can be neglected. 1. Actual observations suggest that outside the bulge, the speed becomes a constant. What is the reason forthis? What is the name of the ‘substance’ responsible for this observation? 2.The Milky Way has two different populations of stars: Population I and Population II stars. What arethe main differences between these two populations of stars in terms of their age, their motion, theirmetal-content, and their location in the Milky Way?arrow_forwardFind the equivalent of Kepler's three laws of motion if the gravita- tional force were to behave like a simple harmonic oscillator; i.e., Substitute m₁m2. F12-G-F12, with F12=-Gm¹m₂F12. T12 Exercise 2.2 from Fundamentals of Galaxy Dynamics, Formation and Evolution by Ignacio Ferrerasarrow_forwardSuppose you want to observe the molecular gas in a galaxy with redshift z using the rotational transition of CO J=4-3. What frequency would you observe this transition at? (Hint: the CO J=1-0 emits a photon at 115.27 GHz, and higher order transitions emit photons with frequencies in multiples of J, e.g., use the knowledge you gained from the problem above). Express your answer as an integer. Values: z = 1.3arrow_forward
arrow_back_ios
SEE MORE QUESTIONS
arrow_forward_ios
Recommended textbooks for you
AstronomyPhysicsISBN:9781938168284Author:Andrew Fraknoi; David Morrison; Sidney C. WolffPublisher:OpenStax
Stars and Galaxies (MindTap Course List)PhysicsISBN:9781337399944Author:Michael A. SeedsPublisher:Cengage Learning
Astronomy
Physics
ISBN:9781938168284
Author:Andrew Fraknoi; David Morrison; Sidney C. Wolff
Publisher:OpenStax
Stars and Galaxies (MindTap Course List)
Physics
ISBN:9781337399944
Author:Michael A. Seeds
Publisher:Cengage Learning