Essential Cosmic Perspective
9th Edition
ISBN: 9780135795033
Author: Bennett
Publisher: PEARSON
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Chapter 10, Problem 28EAP
Which detection method(s) measure(s) gravitational tug of a planet on its star, allowing us to estimate planetary mass? (a) the transit method only (b) the Doppler method only (c) the astro-metric and Doppler methods
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While working with part of a research team you discover a set of exoplanets in a nearby star system. One of the planets is much closer to its mother star than the other and because of this you are able to determine the average radius of the closer planets orbit to be 37.26 x 10 to the 6 kilometers the Planet complete one orbit every 53.4 days.
a) what is the mass of the star in this system?
You decide to go on an interstellar mission to explore some of the newly discovered extrasolar
planets orbiting the star ROTOR. Your spacecraft arrives in the new system, in which there are
five planets. ROTOR is identical to the Sun (in terms of its size, mass, age and composition). From
your observations of these planets, you collect the following data:
Density Average Distance
from star (AU]
Planet
Mass
Radius
Albedo
Temp.
[C]
Surf. Press.
MOI
Rotation
[Earth = 1]
(Earth = 1] [g/cm³]
[Atm.]
Period (Hours]
Factor
SIEVER
EUGENIA
4.0
0.001
2.0
0.1
5.0
1.0
0.3
20
0.8
N/A
3.0
0.2
N/A
0.3
0.4
0.35
20
10
500
1000
5.0
4.0
0.5
0.8
0.4
0.7
-50
MARLENE
CRILE
1.0
1.0
3.0
8.0
1,5
0.0
0.50
0.50
0.25
150
0.4
JANUS
100
12
0.1
10
-80
0.2
200
Figure 1:
А
Rotor
850
890
900
Wavelength (nm)
A
Sun
В
C
860
900
910
Wavelength (nm)
2414
a as
Models of the first star-forming clouds indicate that they had a
temperature of roughly 150 K and a particle density of roughly
400,000 particles per cubic centimeter at the time they started
trapping their internal thermal energy.
▼
Part A
Estimate the mass at which thermal pressure balances gravity for these values of pressure and temperature.
Express your answer in kilograms.
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Mcloud
Submit
Part B
=
Mcloud
How does that mass compare with the Sun's mass?
Express your answer in solar masses.
Submit
Request Answer
=
ΤΙ ΑΣΦ
Request Answer
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kg
MSun
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Chapter 10 Solutions
Essential Cosmic Perspective
Ch. 10 - Prob. 1VSCCh. 10 - Prob. 2VSCCh. 10 - Prob. 3VSCCh. 10 - 4. Match the planet's po,sitions at points 1, 2,...Ch. 10 - How would the plot change if the planet were more...Ch. 10 - Prob. 1EAPCh. 10 - Prob. 2EAPCh. 10 - Prob. 3EAPCh. 10 - Prob. 4EAPCh. 10 - Prob. 5EAP
Ch. 10 - Prob. 6EAPCh. 10 - Prob. 7EAPCh. 10 - Prob. 8EAPCh. 10 - Prob. 9EAPCh. 10 - Prob. 10EAPCh. 10 - Prob. 11EAPCh. 10 - Prob. 12EAPCh. 10 - Prob. 13EAPCh. 10 - Prob. 14EAPCh. 10 - Prob. 15EAPCh. 10 - Prob. 16EAPCh. 10 - Prob. 17EAPCh. 10 - Prob. 18EAPCh. 10 - Prob. 19EAPCh. 10 - Prob. 20EAPCh. 10 - Prob. 21EAPCh. 10 - Prob. 22EAPCh. 10 - Prob. 23EAPCh. 10 - It’s the year 2025: The TESS mission has announced...Ch. 10 - Prob. 25EAPCh. 10 - Prob. 26EAPCh. 10 - 27. Which method co uld detect a planet in an...Ch. 10 - Which detection method(s) measure(s) gravitational...Ch. 10 - 29. Which one of the following can the transit...Ch. 10 - 30. To determine a planet's average density, we...Ch. 10 - 31. Based on the model types shown in Figure 10.12...Ch. 10 - Look at the dot for Jupiter in Figure 10.13, then...Ch. 10 - 33. The term "super-Earth" refers to a planet that...Ch. 10 - 34. What's the best explanation for the location...Ch. 10 - 35. Based on computer models, when is planei ary...Ch. 10 - Prob. 36EAPCh. 10 - When Is a Theory Wrong? As discussed in this cha...Ch. 10 - Unanswe,erd Questions. As discussed in this...Ch. 10 - Unanswered Questions. As discussed in this...Ch. 10 - Group Activity: Time to Move On. A common theme in...Ch. 10 - 40. Explaining the Doppler Method. Explain how the...Ch. 10 - Prob. 42EAPCh. 10 - 42. No Hot Jupiters Here. How do we think hot...Ch. 10 - 43. Low-Density Planets. Only one planet in our...Ch. 10 - Prob. 46EAPCh. 10 - Transit of TrES-1. The planet TrES-1, orbiting a...Ch. 10 - 47. Planet Around 51 Pegasi. The star 51 Pegasi...
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- = 2000 K and a radius of R, A young recently formed planet has a surface temperature T Jupiter radii (where Jupiter's radius is 7 x 107 m). Calculate the luminosity of the planet and 2 determine the ratio of the planet's luminosity to that of the Sun.arrow_forwardThe nearest neutron star (a collated star made primarily of neutrons) is about 3.00 1018 m away from Earth. Given that the Milky Way galaxy (Fig. P1.81) is roughly a disk of diameter 1021 m and thickness 1019 m, estimate the number of neutron stars in the Milky Way to the nearest order of magnitude. Figure P1.81arrow_forwardWhat would be the Schwarzschild radius, in light years, if our Milky Way galaxy of 100 billion stars collapsed into a black hole? Compare this to our distance from the center, about 13,000 light years.arrow_forward
- Kepler’s third law says that the orbital period (in years) is proportional to the square root of the cube of the mean distance (in AU) from the Sun (Pa1.5) . For mean distances from 0.1 to 32 AU, calculate and plot a curve showing the expected Keplerian period. For each planet in our solar system, look up the mean distance from the Sun in AU and the orbital period in years and overplot these data on the theoretical Keplerian curve.arrow_forward(a) Based on the observations, determine the total mass M of the planet. (b) Which moon and planet of our solar system is the team observing? (Use literature.)arrow_forwardConvert 1.39 x 10^9 kilograms to Jupiter Masses, MJ. The mass of Jupiter is known as MJ = 1.898×1027 kg. Mplanet = _________________________ MJ *The accepted mass of this planet HD 209458b is Mplanet = 0.69 MJ. Check your answer for correctness.arrow_forward
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