Answer Happy

You are lucky enough to have observation time on the Jeremy Webb
Space telescope. You take the following image, and would like to
classify the image as either a spiral or elliptical galaxy,
depending on its properties.
Figure 1: Your Jeremy Webb Space Telescope galaxy image for
classification
a) Describe the galaxy you see in the image. Describe the galaxy
in terms of its disk, bulge, and halo, if they are present. [2
marks]
b) What type of galaxy do you think this is? Use your
observations in the first part of the question to justify your
classification. [2 marks]
c) Do you think this galaxy has undergone merging recently? Why
or why not? [2 marks]
d) After looking through archival data, you discover that this
galaxy had its rotation curve measured by Vera Rubin. Do you expect
the galaxy’s rotation curve to increase, stay constant, or decrease
with distance from the center of the galaxy? Why? Is this behavior
consistent with how the density of stars and gas changes with
distance from the centre of the galaxy? Explain your reasoning. [3
marks]