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One of the major problems in star formation is to ascertain the initial conditions from which collapse occurs. Observations can tell us about the conditions in molecular clouds where stars have formed or about the conditions in clouds that haven't yet formed stars. In the first case, any information about the initial conditions has been lost whereas in the second case we do not know whether stars will ever form in them and thus they may not be the appropriate initial conditions. We are investigating how the observable envelopes around young stellar objects depend on the initial conditions for collapse. The aim of this is to determine from what initial conditions star formation occurs.
