Modeling Galactic Chemical Evolution with Zero-Metallicity Nucleosynthesis

Details Modeling Galactic Chemical Evolution with Zero-Metallicity Nucleosynthesis Modeling Galactic Chemical Evolution with Zero-Metallicity Nucleosynthesis

Dec 2005

adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2005aas...207.5405c&link_type=abstract

American Astronomical Society Meeting 207, #54.05; Bulletin of the American Astronomical Society, Vol. 37, p.1238

Other

Scientific paper

We study the chemical evolution of the Milky Way galaxy at early times and low metallicities using a set of approximately 350 models of zero metallicity massive stars. The stars, which span a mass range from 10 to 260 solar masses and include pair instability supernovae, have been evolved from their birth on the main sequence through their deaths as supernovae using a nuclear reaction network of up to 1800 isotopes. The yields from the explosions have been incorporated into a modified version of the Timmes chemical evolution code. The effects of varying the shape of the IMF have been examined. Results are compared to the Cayrel et al data set for [Z] ≈ -3 stars as well as to recent observations of extremely metal poor stars. Overall, the agreement with these data sets is quite good though there are notable discrepancies at Cr and Sc. We find no clear diagnostic of pair instability supernovae, but on the other hand, no clear evidence against their presence with an abundance suggested by the extrapolation of a Salpeter IMF to high masses. Similarly, we find no clear evidence for a ``hypernova" (KE 10**52 erg) component in the stars between 10 and 100 solar masses.
This work has been supported by the NSF (AST-02-06111).

Affiliated with

Also associated with

No associations

Rating

Modeling Galactic Chemical Evolution with Zero-Metallicity Nucleosynthesis 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 Modeling Galactic Chemical Evolution with Zero-Metallicity Nucleosynthesis, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Modeling Galactic Chemical Evolution with Zero-Metallicity Nucleosynthesis will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFWR-SCP-O-1279803