Astronomy and Astrophysics – Astronomy
Scientific paper
May 2004
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2004arep...48..353k&link_type=abstract
Astronomy Reports, vol. 48, Issue 5, p.353-366
Astronomy and Astrophysics
Astronomy
1
Scientific paper
We use a numerical model to investigate the chemical evolution of spiral galaxies. Unlike previous models, our scheme includes the effects of the condensation of heavy elements onto dust grains and the influence of dust on the colors of the galaxies and (both relative and absolute) heavy-element abundances in the gaseous phase. The calibration of the numerical model is based on the observed colors of spiral galaxies, oxygen abundances in HII regions, rates of type Ia and II supernovae, and the mass fraction of gas. The model is used to investigate the possibility that damped Lyα systems observed in the spectra of quasars are associated with spiral galaxies at appropriate evolutionary stages (at redshifts from z=5 to z=0). In the closed, single-zone model used, the damped Lyα systems can be interpreted as Sa-Sd galaxies at early stages of their evolution. In this case, however, the calculated relative abundances of elements such as Si and Fe are, on average, underestimated. We conclude that the incorporation of a dust component is essential for a correct description of the chemical evolution of damped Lyα systems and correct interpretation of the elemental abundances observed in them.
Kasimova E. R.
Shchekinov Yu A.
No associations
LandOfFree
Single-zone model for the evolution of damped Lyα Systems does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Single-zone model for the evolution of damped Lyα Systems, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Single-zone model for the evolution of damped Lyα Systems will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-1181393