The Cosmic Perspective (9th Edition)
9th Edition
ISBN: 9780134874364
Author: Jeffrey O. Bennett, Megan O. Donahue, Nicholas Schneider, Mark Voit
Publisher: PEARSON
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Chapter 13, Problem 5EAP
Briefly describe Ihe Doppler method. Summarize the evidence that the planet orbiting 51 I’egasi is a hot Jupiter.
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H5.
A star with mass 1.05 M has a luminosity of 4.49 × 1026 W and effective temperature of 5700 K. It dims to 4.42 × 1026 W every 1.39 Earth days due to a transiting exoplanet. The duration of the transit reveals that the exoplanet orbits at a distance of 0.0617 AU. Based on this information, calculate the radius of the planet (expressed in Jupiter radii) and the minimum inclination of its orbit to our line of sight.
Follow up observations of the star in part reveal that a spectral feature with a rest wavelength of 656 nm is redshifted by 1.41×10−3 nm with the same period as the observed transit. Assuming a circular orbit what can be inferred about the planet’s mass (expressed in Jupiter masses)?
Kepler-444 is one of many stars with terrestrial planets that is over 10 billion
a) What do you think the spectral type of Kepler-444 might be?
b) How do stars of this spectral type end their lives?
c) If evolution followed a similar course on a habitable pranet around a star similar to
Kepler-444, it would be 5 billion years more advanced than we are. Let’s try to project
our future and see what happens. In particular, suppose our civilization gets motivated
enough to colonize another planet. Kepler indicates that most stars have potentially
habitable (and colonizable) planets, so roughly how far away is the typical “nearest"
planet?
d) The New Horizons probe on its way to Pluto took 9 years to travel 30 AU. If we could
send colony ships with the same average speed, roughly how long would it take to reach
the typical nearest planet?
уears
old.
Why are we unlikely to find Earth-like planets around halo stars in the Galaxy?
A. Halo stars formed in a different way from disk stars.
B. Planets around stars are known to be extremely rare.
C. Halo stars formed in an environment where there were few heavy elements to create rocky planets.
D. Halo stars do not have enough mass to hold onto planets.
Is the answer C? Since halo stars are formed early when the galaxy consisted of mainly hydrogen and helium, there are no heavier elements available to create Earth-like planets so just halo stars are formed?
Thanks!
Chapter 13 Solutions
The Cosmic Perspective (9th Edition)
Ch. 13 - Prob. 1VSCCh. 13 - Prob. 2VSCCh. 13 - Prob. 3VSCCh. 13 - Prob. 4VSCCh. 13 - Prob. 5VSCCh. 13 - I. Why are extrasolar planets hard to detect...Ch. 13 - 2. What are the two major approaches to detecting...Ch. 13 - 3. How can gravitational lugs from orbiting...Ch. 13 - Prob. 4EAPCh. 13 - Briefly describe Ihe Doppler method. Summarize the...
Ch. 13 - How does the transit method work’ What was the...Ch. 13 - Prob. 7EAPCh. 13 - Prob. 8EAPCh. 13 - Prob. 9EAPCh. 13 - Prob. 10EAPCh. 13 - Prob. 11EAPCh. 13 - Prob. 12EAPCh. 13 - Prob. 13EAPCh. 13 - Prob. 14EAPCh. 13 - Prob. 15EAPCh. 13 - Prob. 16EAPCh. 13 - Prob. 17EAPCh. 13 - Prob. 18EAPCh. 13 - Prob. 19EAPCh. 13 - Decide whether the statement makes sense lor is...Ch. 13 - Prob. 21EAPCh. 13 - Prob. 22EAPCh. 13 - Prob. 23EAPCh. 13 - Prob. 24EAPCh. 13 - Decide whether the statement makes sense lor is...Ch. 13 - Prob. 26EAPCh. 13 - Prob. 27EAPCh. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - Choose Lhe best ansuter to each of the following....Ch. 13 - When is a Theory Wrong? As discussed in this...Ch. 13 - Prob. 40EAPCh. 13 - Prob. 42EAPCh. 13 - Prob. 43EAPCh. 13 - Comparing Methods. What are the strengths and...Ch. 13 - No Hot Jupiters Here. How do we think hot Jupiters...Ch. 13 - Prob. 46EAPCh. 13 - Prob. 47EAPCh. 13 - Lost in the Glare. This exercise helps you...Ch. 13 - Transit of TrES-1. The planet TrES-1, orbiting a...Ch. 13 - Planet Around 51 Pegasi. The star 51 Pegasi has...Ch. 13 - Identical Planets? Imagine two planets orbiting a...
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