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Diagnostics of the ISM in star formation regions

Published online by Cambridge University Press:  21 March 2013

Willem A. Baan ,
Edo Loenen  and
Xiaoli Lian
Willem A. Baan
Affiliation:
Netherlands Institute for Radio Astronomy, Postbus 2, NL-7990 AA, Dwingeloo, Netherlands email: baan@astron.nl
Edo Loenen
Affiliation:
Leiden Observatory, P.O. Box 9513, NL-2300 RA Leiden, The Netherlands email: loenen@strw.leidenuniv.nl
Xiaoli Lian
Affiliation:
Shanghai Astrophysical Observatory, Shanghai, China email: lianxiaoli@shao.ac.cn
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Abstract

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Line emissions of high- and low-density molecular tracers serve as powerful diagnostic tools for the ISM in both Galactic and extragalactic star formation environments. The emission line strengths and line ratios may be interpreted using detailed modeling of both the dominant physics and the chemistry of the molecular constituents. Observed molecular line ratios will thus reveal the signatures of dominant UV, X-ray, and CR radiation fields and of mechanical heating and feedback from the star formation process. In addition, certain line ratios reflect the physical and chemical changes resulting from the time-evolution of a star formation region. In this paper, we present results of Galactic sources and extragalactic starbursts covering a large range of FIR luminosities and illustrate the similarities between the diagnostics of these environments.

Keywords

line: formation — ISM: molecules — ISM: evolution — galaxies: ISM — stars: formation
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 8 , Symposium S292: Molecular Gas, Dust, and Star Formation in Galaxies , August 2012 , pp. 215 - 218
Copyright
Copyright © International Astronomical Union 2013

References

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