Meeting Update Dec.10

cloud stability Using my setup to run the cloud stability for one crossing time:
​http://www.pas.rochester.edu/~shuleli/meeting_1210/mysetup.gif

We can see that the cloud breathing, and there is no significant expansion or contraction. There is a movie for the cut-through density here:
​http://www.pas.rochester.edu/~shuleli/meeting_1210/mysetupcut.gif

This setup is obtained by feeding Boss 2010's central and ambient density to the BE module in the code. The problem is that the density at the edge of the clump is not the same as Boss' number. We have 1000 density contrast at the edge of the cloud (radius = 0.058pc), they have 100 density contrast. Also, our temperature is 124k inside the cloud while they have 10k.

If we increase the cloud radius to 4 times the original, we can get the edge density drop to Boss' value. But the cloud seems to collapse under 1 crossing time scale:
​http://www.pas.rochester.edu/~shuleli/meeting_1210/myset2.gif

In order to match exactly their profile, I tried increasing the density contrast (making the profile steeper). By doing this, the supposed ambient density will be 10 times lower than the original (1e-23 g/cc vs 1e-22 g/cc). I pad the ambient by the Boss' ambient density and match the temperature at the cloud edge. This results in a profile exactly the same as theirs, with the same in-cloud temperature 10K. However, this setup collapses for under 1/10 crossing time (about 1 shock crossing time):
​http://www.pas.rochester.edu/~shuleli/meeting_1210/bosssetup.gif

Here is a movie for the cut-through density:
​http://www.pas.rochester.edu/~shuleli/meeting_1210/bosscut.gif

If we do not pad the ambient by the original value and just use what is calculated in the code, we get:
​http://www.pas.rochester.edu/~shuleli/meeting_1210/boss2.gif

At this point, I think using our own setup should be just fine since it produces a fairly stable cloud for 1 crossing time scale. However, since the density at the edge of the cloud is about 1000 times the ambient and only 1.5 times below the central density, the incoming wind will have a peak density close to the central density of the cloud if we still want to match the wind density with the cloud edge density. I'm not sure currently how important this condition is to the result. I think we need to do some wind-cloud interaction simulations next to verify how to setup the wind.

Papers Finished the revised version of the clump paper and the referee response. The only tiny problem is that in his comments 5 and 6, the referee suggested the restructuring of the material, which is not done in the revision (we just argued that our version is the best).
​http://www.pas.rochester.edu/~shuleli/meeting_1210/paper_shule_1210.pdf
​http://www.pas.rochester.edu/~shuleli/meeting_1210/referee_response_1210.pdf

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