Other
Scientific paper
Feb 1961
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1961rspsa.260..152m&link_type=abstract
Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Volume 260, Issue 1301, pp. 152-159
Other
9
Scientific paper
The paper deals with the processes of star formation under existing conditions in the galaxy. The raw material is that of interstellar clouds and attention is called to the inference that this material is probably mainly in the form of molecular hydrogen throughout most of the processes considered. It is found that a cloud having a mass of about 1000 solar masses may well be brought to the point of gravitational collapse by the pressure exerted by `hot' interstellar material, but there is no known agency that is capable of causing a much smaller mass of the raw material to collapse. It is inferred that the material destined to form an entire galactic stellar cluster undergoes gravitational contraction as a whole. This leads to particular instances of the well-known problems in cosmogony of fragmentation and of the disposal of angular momentum. It is suggested that these problems, and others, find a natural solution if the raw material at a suitable stage may be regarded as broken up into `floccules' in a state of chaotic supersonic motion. Then a condensation is formed simply from floccules that happen to be moving towards it. Thus conditions suitable for the production of any star exist only as conditions for the production of a number of stars, this being probably the fundamental reason for the cluster-origin of stars. These ideas have been found to offer what appears to be a promising theory of the origin of the solar system. Finally, reasons are briefly stated for the possible validity of the adopted representation of the state of motion of the medium by the concept of floccules.
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