Astronomy and Astrophysics – Astrophysics
Scientific paper
Oct 1988
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1988a%26a...205...71p&link_type=abstract
Astronomy and Astrophysics (ISSN 0004-6361), vol. 205, no. 1-2, Oct. 1988, p. 71-76. Research supported by the Universidad de lo
Astronomy and Astrophysics
Astrophysics
30
Cosmic Dust, Galactic Evolution, Interstellar Matter, Star Formation Rate, Thermal Instability, Abundance, Interacting Galaxies, Molecular Clouds, Ultraviolet Radiation
Scientific paper
The author has analyzed the influence of dust content, UV radiation, primary cosmic ray ionization rate, and metal abundance upon the conditions for small cool clouds condensation. The hypothesis that, in isolated galaxies, the star formation rate is self-regulated in such a way that it maintains Pmax close to the ISM gas pressure P (where Pmax is the gas pressure at the marginal state of stability for the transition from warm gas to small cool clouds) has been tested for a sample of isolated and interacting galaxies. For the former, it appears that P ≅ Pmax. This result suggests that the UV radiation regulates the star formation and that the dust content plays an important role in determining the rate of star formation.
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