Create "simulated" CO cube of Galaxy from top-down

Inspired by the conversations Ted and Alyssa and I had last Thursday, let's develop a way to create simulated images of the Galaxy in CO.

[x] take in the Catalog of "final" ish clouds.
[x] Make a relation between the physical radius of a cloud, and an emission profile you think such a cloud should have. Is a cloud's emission profile a Gaussian? is it a top hat? something in-between? Let's start with a Gaussian and iterate from there. Assume clouds are spherical for now.
[x] Given the above cloud-emission-profile, write a function that computes the 2d (or 3d, in PPV?) intensity of a cloud, that accurately reflects its observed mass (that is, needs to reproduce M = 4.4 X2 Lco - we'll do some normalizing, I expect, since the cloud has a mass in the catalog which implies a certain luminosity)
[x] do that for every cloud, then take the superposition of all cloud-emissions and put them in one map
[ ] for extra credit, do this under varying rotations / projections, rather than just from top-down x,y.
[ ] also extra credit: The degenerate case of "as observed from the Sun" should reproduce the l, b maps we actually see, although getting the perspective in there (i.e. computing emission from an observer at close distances rather than "at infinity" may be tricky!")

And then we'll visualize it, using the SAME COLOR SCHEME that is used to visualize CO emission elsewhere in the Galaxy - to make a powerful point.

tomr-stargazer / dendrogal