Homework 10, the last one...
Please answer at least 4 of the following 5 questions correctly for full
credit:
Question 1
By spectral classification: What kind of stars are found in the galactic
halo? O and B stars or K and M stars?
Question 2
Which spectral classes of stars give a spiral's galactic disk its bluish
hue?
Question 3
Which two hydrogen lines are used to map the matter distribution in the
galactic disk?
Question 4
What do we think is making the spiral arms in a spiral galaxy and
why can the orbits of the stars in the disk of a spiral not be responsible
for the beautiful spiral arms?
Question 5 (the conceptual one)
How do we know how much dark matter is hidden inside a galaxy?
Please submit your answer as plain test in the main message body of an e-mail to
kai-1060-hw@physics.utah.edu
before midnight (MST) on April 17, 2008. Plain text in the main
message body of your e-mail means
Last modified: Fri Apr 11 13:15:11 MDT 2008