Supernova 1987A

Welcome to the e-mail version of this lab. I hope you took the time to complete the light curve and determine some opinions at the mirror SN 1987A page first before coming directly here or you will not be able to answer any of the questions with confidence. You may have done the work and still lack confidence, but go ahead and see how you did and I will try to be understanding. There is a correction to the lab page that you have seen on the earlier screen that will affect how you graph the data. On the data sheet, the "days since event" column has 2 errors:

f = May 5 should be 71 days.

g = May 25 should be 90 days

Otherwise, remember that you are using the measurement of parsecs and not lightyears for the value of "r."

Your Name:

E-mail Address (Required):


1) After plotting the graph and drawing a smooth line through the data points, determine the date of maximum brightness. What is that date?

2) Use your smoothed curve to arrive at an estimate of the image diameter of SN 1987A at the date of maximum brightness. What is that image diameter?

mm

3) What is your estimate of the apparent magnitude (m) of SN 1987A at the date of maximum brightness?


4) What is your estimate of the absolute magnitude (M) of SN 1987A at the date of maximum brightness?

how did you arrive at that number?

5) From your work, do you think SN 1987A was a Type I or a Type II event?

 

6) Why have you made this conclusion?

 


       

When you have completed this quiz and are satisfied with your responses, click on the submit button above the dashed red line on this page, and then you may move back to Supernovae, the Largest Stars, or go forward to either the Smallest Stars or to Galaxies, or return to Introduction to the Stars, or the Syllabus.


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