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Self-Regulated Star Formation via UV-dependent Phase Transitions in the ISM: Application to SO and Infrared-Luminous Galaxies

Published online by Cambridge University Press:  03 August 2017

Antonio Parravano  and
Harley Thronson
Antonio Parravano
Affiliation:
Royal Observatory of Edinburgh, Universidad de Los Andes,
Harley Thronson
Affiliation:
Royal Observatory of Edinburgh, University of Wyoming

Extract

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Self-Regulated star formation on large scale is an attractive notion in the study of galaxy evolution. Here we are interested in a self-regulating mechanism based on the sensitivity of the warm gas condensation on the UV interstellar radiation field (Parravano 1989). In this model the star formation rate (SFR) is assumed to be self-regulated in such a way that it maintains Pmax approximately equal to the interstellar warm gas pressure. Here, Pmax is the pressure in the marginal state of stability for the transition warm gas — > small clouds. Due to the dependence of Pmax on the gas density, gas composition, and dust content, the resulting self-regulated star formation rate also depends on this parameters. In term of global galactic parameters the self-regulated SFR (ψpp) can be expressed (Parravano 1989)

Type
II- Early-type and Irregular Galaxies
Information
Symposium - International Astronomical Union , Volume 146: Dynamics of Galaxies and their Molecular Cloud Distributions , 1991 , pp. 49
Copyright
Copyright © Kluwer 1991 

References

References:

Parravano, A., 1989, Ap. J., 347, 812; Thronson, H.A. et al. 1989, Ap. J., 344, 747; Young, J.S. et al. 1989, Ap. J. Suppl., 70, 699.CrossRefGoogle Scholar