The chemo-dynamical evolution of a disk galaxy

Details The chemo-dynamical evolution of a disk galaxy The chemo-dynamical evolution of a disk galaxy

Apr 2003

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2003ap%26ss.284..841s&link_type=abstract

Astrophysics and Space Science, v. 284, Issue 2, p. 841-844 (2003).

Astronomy and Astrophysics

Astrophysics

Galaxies: Formation, Evolution, Stellar Content, Structure, Kinematics And Dynamics, Ism

Scientific paper

I present a model for the formation and evolution of a massive disk galaxy, within a growing dark halo whose mass evolves according to cosmological simulations of structure formation. The galactic evolution is simulated with a new three-dimensional chemo-dynamical code, including dark matter, stars and a multi-phase ISM. We follow the evolution from redshift z= 4.85 until the present epoch. The energy release by massive stars and supernovae prevents a rapid collapse of the baryonic matter and delays the maximum star formation until redshift z ≈ 1. The galaxy forms radially from inside-out and vertically from top-to-bottom. Correspondingly, the inner halo is the oldest component, followed by the outer halo, the bar/bulge, the thick and the thin disk. The bulge in the model consists of at least two stellar subpopulations, an early collapse population and a population that formed later in the bar.

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