Evolution of Spiral Galaxies. V. The Galactic Bulge

Details Evolution of Spiral Galaxies. V. The Galactic Bulge Evolution of Spiral Galaxies. V. The Galactic Bulge

Dec 1995

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=1995apj...454..726m&link_type=abstract

Astrophysical Journal v.454, p.726

Astronomy and Astrophysics

Astronomy

19

Galaxies: Evolution, Galaxies: Kinematics And Dynamics, Galaxies: Spiral, Galaxies: Structure

Scientific paper

We apply the multipopulation nonlinear model developed by Ferrini and coworkers to the evolution of the bulge of the Galaxy. We investigate the hypothesis of a bulge formed from the accumulation of gas by accretion from the halo in the center of the Galaxy. We extend the properties of phase interactions, determined in the solar neighborhood, to the bulge. The models show that bulge star formation in the bulge peaked during the early stages of the Galactic evolution and that the consequent element enrichment is in agreement with the observed metal abundances in bulge stars. The evolution of Galactic bulges and elliptical galaxies cannot be considered equivalent.

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