The effects of population III stars on the chemical and photometrical evolution of ellipticals

Details The effects of population III stars on the chemical and photometrical evolution of ellipticals The effects of population III stars on the chemical and photometrical evolution of ellipticals

2004-11-26

arxiv.org/abs/astro-ph/0411729v1

Mon.Not.Roy.Astron.Soc. 357 (2005) 489-496

Astronomy and Astrophysics

Astrophysics

9 pages, 6 figures, MNRAS accepted

Scientific paper

10.1111/j.1365-2966.2004.08605.x

We have studied the effects of an hypothetical initial generation containing very massive stars (M > 100 Msun, pair-creation SNe) on the chemical and photometric evolution of elliptical galaxies. To this purpose, we have computed the evolution of a typical elliptical galaxy with luminous mass of the order of 10^11 Msun and adopted chemical evolution models already tested to reproduce the main features of ellipticals. We have tested several sets of yields for very massive zero-metallicity stars: these stars should produce quite different amounts of heavy elements than lower mass stars. We found that the effects of population III stars on the chemical enrichment is negligible if only one or two generations of such stars occurred, whereas they produce quite different results from the standard models if they continuously formed for a period not shorter than 0.1 Gyr. In this case, the results are at variance with the main observational constraints of ellipticals such as the average [] ratio in stars and the integrated colors. Therefore, we conclude that if population III stars ever existed they must have been present for a very short period of time and their effects on the following evolution of the parent galaxy must have been negligible. This effect is minimum if a more realistic model with initial infall of gas rather than the classic monolithic model is adopted. Ultimately, we conclude that there is no need to invoke a generation of very massive stars in ellipticals to explain their chemical and photometric properties.

Affiliated with

Also associated with

No associations

Rating

The effects of population III stars on the chemical and photometrical evolution of ellipticals 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 The effects of population III stars on the chemical and photometrical evolution of ellipticals, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and The effects of population III stars on the chemical and photometrical evolution of ellipticals will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-353042