In article , I wrote:
Many processes for stopping star formation have been suggested,
but their relative importance is unknown.
The 2017 July issue of _Sky & Telescope_ has a good overview of the
subject (p 22, author Keith Cooper). I'd quibble with a few things:
infalling, shock-heated gas is not mentioned, and there's confusion
among radiation pressure, stellar and supernova outflows, and
radiative ionization. Nevertheless, the article gives a good sense
of the knowns and unknowns.
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