A103 Exploration 5 Worksheet
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Indiana University, Bloomington *
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Course
A103
Subject
Astronomy
Date
Apr 3, 2024
Type
docx
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2
Uploaded by DeanGrouse1567
A103 Exploration 5- The Transit Method and RV Method
NAME: Instructions and Tips:
The figures used for this activity are found in the Canvas assignment page. Reading the assignment instructions and figure captions on the Canvas page is necessary to complete this exploration activity. Note: For all questions in Part 1 & Part 2 assume the star is exactly the same as the Sun. Same mass, same radius, same temperature, etc.
Part 1:
Question 1: [12 points]
A)
From the figure, what is the transit depth from the transit curve? You can estimate the average value by eye and write the number (do not need to show any work). [3 points]
B)
Based on the transit depth and radius of the Sun, what is the radius of this planet in Jupiter radii? Explain how you derived your answer in 1 sentence. [3 points]
Note:
Sun’s radius = 10 Jupiter Radii
C)
W
h
at is the period of this exoplanet in years? What is the distance from the host star in AU? Round your answers to the nearest whole number (for example 2.2 years would be 2 years) [4 points]
Note: You can use Kepler’s 3
rd
law to calculate the distance to the host star!
D)
B
a
s
e
d on the distance from the host star and radius, what planet in our solar system does this object most closely resemble? Explain your reasoning in a sentence or two. [2 points]
(Answer Here)
(Answer Here)
(Answer Here)
(Answer Here)
Part 2
: Note: For all questions in Part 1 & Part 2 assume the star is exactly the same as the Sun. Same mass, same radius, same temperature, etc.
Prof. Gerber finally gets to use NEID on the WIYN 3.5m telescope and excitedly rushes to class after a few nights of observing to show this plot! Prof. Gerber claims
to have found a hot Jupiter exoplanet by comparing the radial velocity measurements to the prediction (blue line)!
A)
Based on the data and RV model, what is the orbital period of the discovered exoplanet? In other words, how long does it take for this exoplanet to make one trip around its hosts star (in days)? [2 points]
B)
B
ased on the orbital period, do you think this is a hot Jupiter or resembles Jupiter from our solar system? Answer in a sentence or two. [2 points]
C)
W
h
at are two key exoplanet properties that make a hot Jupiter more easily detectable by the radial velocity method than an Earth-like planet at 1 AU? In other words, what properties of a hot Jupiter cause its host star to have larger “wobbles” (or radial velocity variations)? You can answer each property in a few words[4 points]
Property 1:
(Remove this text and write the property here)
Property 2:
(Remove this text and write the property here)
(Answer Here)
(Answer Here)
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