Abstract
J. Gaustad has shown that no pause is to be expected in the free-fall collapse of an interstellar cloud until the hydrogen and helium of the fragments become ionized. It follows that there cannot be significant loss of angular momentum from the fragments during the collapse. The size and mass distribution of the resulting nebular disks formed from the fragments are discussed. Following a discussion of Mestel, it is concluded that two forms of mass distribution are possible, each with dimensions comparable to those of the solar system. In one, with axial condensation, there is shear and further condensation to form a single star with accompanying planets seems likely. In the other, without axial condensation, there is no shear and binary star formation seems likely.
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