The chemo-dynamical evolution of a disk galaxy

Author: Samland, M.

Source: Astrophysics and Space Science, Volume 284, Number 2, 2003 , pp. 841-844(4)

Publisher: Springer

Buy & download fulltext article:


Price: $47.00 plus tax (Refund Policy)


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.

Keywords: Galaxies: formation; ISM; evolution; kinematics and dynamics; stellar content; structure

Document Type: Research Article

Affiliations: Astronomisches Institut der Universit├Ąt Basel, Venusstrasse 7, CH-4102 Binningen, Switzerland E-mail:

Publication date: January 1, 2003

Related content


Free Content
Free content
New Content
New content
Open Access Content
Open access content
Subscribed Content
Subscribed content
Free Trial Content
Free trial content

Text size:

A | A | A | A
Share this item with others: These icons link to social bookmarking sites where readers can share and discover new web pages. print icon Print this page