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BEAnalysis

-              v7
+              v8
 = Case 1 - Increase in Mass =
 Collapse is triggered by this case when the mass is assimilated into the sphere faster than the ram pressure squeezes the sphere into a smaller radial volume, thereby reducing the Jeans length. But how would this happen?
+Collapse is triggered by this case when the mass is assimilated into the sphere faster than the ram pressure squeezes the sphere into a smaller radial volume, thereby reducing the Jeans length. But how would this happen? Possible conditions are as follows:
+. Pram < Pthermal at the BE sphere/ambient boundary.
+. Pram < Pthermal at the BE sphere/ambient boundary. This can happen either with a low density ambient flow or a low velocity ambient flow at the boundary. If the v of the ambient is low, but rho is not, the ambient may settle on the sphere but provide little ram pressure on it. Does the material then assimilate into the sphere? Diagnostic: ram pressure at sphere's surface, tracer of ambient material inside sphere as function of time. If the reverse happened, low enough rho that Pram is sufficiently small to not force compression, but the v of low density flow carries material into the sphere. Question: What is required force to compress sphere? How does isothermal EOS interplay with this motion?
+. Internal sound waves can increase rho within a certain r beyond critical levels. Diagnostic: M(r)/MBE at different times.
 = Case 2 - Decrease in Radius =