Module 5, Assignment 7

Send a screen shot of the spectrum of 41 Cygnus to your teacher. Explain what your temperature estimate is for this star.

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 your teacher) 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 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 your teacher. 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?

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.

optional module 8

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

optional module 9

write a research report