Mathematics – Logic
Scientific paper
Oct 1984
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1984stfm.work..199s&link_type=abstract
In Royal Observatory Star Formation Workshop p 199-210 (SEE N85-12809 03-88)
Mathematics
Logic
Interstellar Matter, Molecular Clouds, Spiral Galaxies, Stellar Evolution, Carbon Monoxide, Radial Distribution, Supermassive Stars
Scientific paper
Studies of the interstellar medium in late spiral galaxies are discussed. The one-to-one proportionality between H2 mass and optical luminosity as a function of radius and from galaxy to galaxy within a single morphological class suggests that the bulk of star formation may occur in molecular clouds independently of their location within the galaxy. The clouds are enormously massive, so if most of the star forming material is within them, it is well shielded and insulated from the external environment. The rate of star formation throughout most of a given cloud cannot therefore be easily influenced by external effects such as spiral shocks or even supernovae. However, formation of massive stars is correlated with spiral arms, suggesting that a fraction of the overall rate of star formation is triggered by the external environment.
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