Star Formation in a Multi-Phase ISM

Details Star Formation in a Multi-Phase ISM Star Formation in a Multi-Phase ISM

2003-02-05

arxiv.org/abs/astro-ph/0302096v1

Astrophys.Space Sci. 284 (2003) 869-872

Astronomy and Astrophysics

Astrophysics

4 Pages, 5 Figures, to appear in "The Evolution of Galaxies: III. From Simple Approaches to Self-Consistent Modelling", 2003,

Scientific paper

10.1023/A:1024090029279

We present a 3d code for the dynamical evolution of a multi-phase interstellar medium (ISM) coupled to stars via star formation (SF) and feedback processes. The multi-phase ISM consists of clouds (sticky particles) and diffuse gas (SPH): exchange of matter, energy and momentum is achieved by drag (due to ram pressure) and condensation or evaporation processes. The cycle of matter is completed by SF and feedback by SNe and PNe. A SF scheme based on a variable SF efficiency as proposed by Elmegreen & Efremov (1997) is presented. For a Milky Way type galaxy we get a SF rate of ~1 M_sun/yr with an average SF efficiency of ~5%.

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