Chemical evolution of irregular galaxies

Details Chemical evolution of irregular galaxies Chemical evolution of irregular galaxies

Jun 1982

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1982a%26a...110...54c&link_type=abstract

Astronomy and Astrophysics, vol. 110, no. 1, June 1982, p. 54-60. Research supported by the Consiglio Nazionale delle Ricerche.

Astronomy and Astrophysics

Astrophysics

13

Chemical Evolution, Galactic Evolution, Gas Density, Interstellar Gas, Magellanic Clouds, Stellar Evolution, Abundance, Mass Ratios

Scientific paper

Models of chemical evolution of irregular galaxies of the Magellanic type are constructed, in which inflow of unprocessed gas and a novel formulation for the rate of star formation are taken into account. The rate of star formation is assumed to depend on the total mass of the system. Four galaxies, LMC, SMC, NGC 6822, and NGC 3109, are chosen as test objects; constant mass evolution of stars during the major phases of nuclear burning, and current initial mass functions are adopted. The overall results are in good agreement with observations. The models do not contradict the self-propagating stochastic model of star formation of Gerola et al. (1980) when applied to irregular galaxies of the Magellanic type.

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