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Vertical and Radial Distributions of Gas and Young Objects in the Galaxy and the Schmidt’s Law of Star Formation

Published online by Cambridge University Press:  12 April 2016

J. Guibert ,
J. Lequeux  and
F. Viallefond
J. Guibert
Affiliation:
Observatoire de Paris-Meudon, 92190 Meudon, France
J. Lequeux
Affiliation:
Observatoire de Paris-Meudon, 92190 Meudon, France
F. Viallefond
Affiliation:
Observatoire de Paris-Meudon, 92190 Meudon, France

Abstract

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The thickness of the disc distribution of young objects is shown to be significantly smaller than that of the interstellar gas over the whole Galaxy, as predicted by the Schmidt’s law of star formation. The radial distribution of the density of young objects at z = 0, compared with that of the gas, is also consistent with the Schmidt’s law. The exponent in this law is found to be between 1.5 and 2. A brief discussion of simple models of galactic evolution using the Schmidt’s law is made.

Type
Part III: The Chemical Properties of the Disc and the Halo in our Galaxy
Information
International Astronomical Union Colloquium , Volume 45: Chemical and Dynamical Evolution of our Galaxy , September 1977 , pp. 165 - 168
Copyright
Copyright © Geneva Observatory 1977

References

Schmidt, M., 1959, Astrophys. J., 129, 243 Google Scholar
Smith, L.F., Bierman, P., and Mezger, P.G., 1977, Astron. and Astrophys. in press.Google Scholar
Talbot, R.J. Jr., and Arnett, W.D., 1975, Astrophys. J., 197, 551 Google Scholar
Vigroux, L., Audouze, J., and Lequeux, J., 1976, Astron. and Astrophys. 52, 1 Google Scholar