Astronomy and Astrophysics – Astrophysics
Scientific paper
Sep 1990
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1990ap%26ss.171..149h&link_type=abstract
(IAU, European Regional Astronomy Meeting, 11th, La Laguna, Spain, July 3-8, 1989) Astrophysics and Space Science (ISSN 0004-640
Astronomy and Astrophysics
Astrophysics
10
Astronomical Models, Interstellar Matter, Star Formation, Stellar Evolution, Metallicity, Phase Transformations, Stellar Winds, Supernovae
Scientific paper
The effects of different processes and factors on the evolution of the interstellar medium (ISM) and the star-formation rate (SFR) are investigated. Calculations were performed using a one-zone model and taking into account stellar evolutionary time-scales and nucleosynthesis; stellar mass loss and energy release to the ISM by means of both supernovae and stellar winds; and a multicomponent ISM with phase transitions by means of condensation, evaporation, and ionization, as well as metal-dependent heating and cooling of the different phases. Results show that the metallicity is highest in the hot ICM, and that the difference between the metallicities of the hot and the cool gas phases depends strongly on the SFR (i.e., the lower the SFR, the higher the deviation between the gas phases). This is due to the fact that a lower SFR produces a lower SN rate.
Burkert Andreas
Hensler Gerhard
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