Astronomy and Astrophysics – Astrophysics – Galaxy Astrophysics
Scientific paper
2010-04-06
Astronomy and Astrophysics
Astrophysics
Galaxy Astrophysics
30 pages, 11 figures. Rev. Mex. Astron. Astrof. accepted
Scientific paper
We present chemical evolution models of the Galactic disk with different Z-dependent yields. We find that a moderate mass loss rate for massive stars of solar metallicity produces an excellent fit to the observed C/H and C/O gradients of the Galactic disk. The best model also fits: the H, He, C, and O abundances derived from recombination lines of M17, the protosolar abundances,and the C/O-O/H, C/Fe-Fe/H, and O/Fe-Fe/H relations derived from solar vicinity stars. The agreement of the model with the protosolar abundances implies that the Sun originated at a galactocentric distance similar to the one it has. Our model for $r=3$ kpc implies that a fraction of the stars in the direction of the bulge formed in the inner disc. We obtain a good agreement between our model and the C/O versus O/H relationship derived from extragalactic H~{\sc ii} regions in spiral galaxies.
Carigi Leticia
Peimbert Manuel
No associations
LandOfFree
HII Regions And the Protosolar Helium, Carbon, and Oxygen Abundances in the Context of Galactic Chemical Evolution 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 HII Regions And the Protosolar Helium, Carbon, and Oxygen Abundances in the Context of Galactic Chemical Evolution, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and HII Regions And the Protosolar Helium, Carbon, and Oxygen Abundances in the Context of Galactic Chemical Evolution will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-56753