Optional Module 8

Record your results on the blog and send a screen shot to chris martin.

Optional Module 7

In this exercise, you will use imageJ with an astronomy plugin to create color (RGB) composite images. You will have to download the plugin and place files into your imagej program file. You will make color composite images using each image set. Send the images to martinbrockie@gmail.com. On the blog discuss how you constructed the images; adjusting, color combining and aligning.

Module 6, Assignment 9

Comment on how the pencil appears to move with respect to a background object. Now, repeat this but with the pencil at a different distance from your face. How does the apparent shift of the pencil change?

Send a screen shot or copy of this plot to Chris. Comment on your plot. Do you see a relationship? Compare it with a published HR diagram: for example, see Wikipedia, Hertzsprung-Russell Diagram

Sort the data by B-V. (Remember, this is a measure of temperature.) How does B-V compare with the spectral types in the table? Make a table to express the relation. Make a third column for temperature. How does your table compare with the axes in the published HR diagram from Wikipedia?

Using the distance modulus equation, what distance do you derive?

Module 5, Assignment 8

Post your spectral class and temperature for three of the stars, identified by the HD number, as well as the spectral type, B, and V from SIMBAD. 

Include a screen shot of at least one spectrum (send to Chris Martin) with the lines you have identified.

Which technique do you think is more accurate for determining spectral class- temperature as determined by Wien’s Law or as determined by spectral lines?

Module 5, Assignment 7

Send a screen shot of the spectrum of 42 Cygnus to Chris Martin. Explain what your temperature estimate is for this star.

Module 4, Assignment 6

Send your pictures to Chris Martin and explain how you might use this activity with your students.

Module 3, Assignment 5

Post a list of the stars (identifying them by their HD, SAO or Feige numbers) your estimates of temperature (in degrees K), and the number of significant figures you believe are appropriate. Calculate the relative luminosity, compared to the coolest star in your sample, for each of the other 5 stars. To do this, select the coolest star in your sample and define its luminosity as 1, and scale the remaining stars to this one.