Extrasolar Planets: Homework 1
This homework must be submitted on paper
before 16:50 on
Monday, Oct 10.
Use any of the following (or any other sites you prefer)
to answer the questions:
- Pick 2 methods by which exoplanets can be discovered.
Make a graph showing the number of planets discovered by
each method over the period 1995 - 2015.
- Look at the names of the host stars. These names usually
have the form of a prefix (such as "HD") followed by a number.
- What are the 5 most common prefixes?
If a prefix is an abbreviation, write the full name.
Provide a reference for each common prefix,
if you can.
Divide the planets into three groups: those discovered
before 2000, between 2000 and 2009, since 2009.
- How does the mix of these most common names
change from one time period to the next?
- Why does the mix of names change?
Be specific: connect the typical properties
of stars in particular catalogs
to the methods used to discover planets.
- You receive an E-mail from your eccentric uncle.
"Hey," it reads, "I've been looking at this star,
and I think it may have a planet passing in front
of it. Could you check it, please?
The first column is time in days, and the second
column is counts."
Attached to the E-mail is
an ASCII text file with numbers.
- Make a plot showing flux as a function of time.
- What is the period of variation?
Explain your method.
- Make a phased light curve with your value for the period.
If you're not sure what 'a phased light curve' is,
or how to create it, then