Evolutionary models for disk galaxies

Details Evolutionary models for disk galaxies Evolutionary models for disk galaxies

Oct 1992

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1992a%26a...264...37f&link_type=abstract

Astronomy and Astrophysics (ISSN 0004-6361), vol. 264, no. 1, p. 37-48.

Statistics

Computation

53

Astronomical Models, Disk Galaxies, Galactic Evolution, Accretion Disks, Computational Astrophysics, Mathematical Models, Star Formation Rate

Scientific paper

The evolution of disk galaxies is studied within the framework of a gas turbulence energy balance between the supernovae input energy and the turbulence collisional dissipation. The initial mass, the angular momentum, and the gas accretion rate determine the evolution of the models. We predict the present gas content and the star formation history of a galaxy. The role of gas accretion is discussed. The comparison between models and observations shows that gas accretion may be very important to explain the high gas content of the dwarf irregular galaxies. A Schmidt's law with a star formation rate per surface unit proportional to the square of the gas surface density provides a good agreement with the models at the Hubble time as well as during their evolution.

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