H II Regions and Protosolar Abundances in Galactic Chemical Evolution
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| Format: | Artículo científico |
| Sprache: | en |
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Universidad Nacional Autónoma de México
2011
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| _version_ | 1876466518360850432 |
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| author | L. Carigi |
| author_facet | L. Carigi |
| contents | H II Regions and Protosolar Abundances in Galactic Chemical Evolution L. Carigi M. Peimbert Física, Astronomía y Matemáticas ISM Sun bulge Galaxy Galaxies 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 now. 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 II regions in spiral galaxies. 2011 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57119922010 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.47 |
| format | Artículo científico |
| id | redalyc_57119922010 |
| institution | Redalyc |
| language | en |
| publishDate | 2011 |
| publisher | Universidad Nacional Autónoma de México |
| spellingShingle | H II Regions and Protosolar Abundances in Galactic Chemical Evolution L. Carigi Física, Astronomía y Matemáticas ISM Sun bulge Galaxy Galaxies H II Regions and Protosolar Abundances in Galactic Chemical Evolution L. Carigi M. Peimbert Física, Astronomía y Matemáticas ISM Sun bulge Galaxy Galaxies 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 now. 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 II regions in spiral galaxies. 2011 artículo científico 0185-1101 https://www.redalyc.org/articulo.oa?id=57119922010 en http://www.redalyc.org/revista.oa?id=571 Revista Mexicana de Astronomía y Astrofísica application/pdf Universidad Nacional Autónoma de México Revista Mexicana de Astronomía y Astrofísica (México) Num.1 Vol.47 |
| title | H II Regions and Protosolar Abundances in Galactic Chemical Evolution |
| topic | Física, Astronomía y Matemáticas ISM Sun bulge Galaxy Galaxies |
| url | https://www.redalyc.org/articulo.oa?id=57119922010 |