The Helium and Heavy Elements Enrichment of the Galactic Disk
| dc.creator | Carigi, Leticia | |
| dc.creator | Peimbert, Manuel | |
| dc.date | 2008-01-18 | |
| dc.date | 2008-08-01 | |
| dc.date.accessioned | 2026-07-07T09:53:52Z | |
| dc.date.available | 2026-07-07T09:53:52Z | |
| dc.description | We present chemical evolution models for the Galactic disk. We also present a new determination of X, Y, and Z for M17 a Galactic metal-rich Hii region. We compare our models for the Galactic disk with the Galactic Hii regions abundances. The $ΔY/ΔO$ ratio predicted from the galactic chemical evolution model is in very good agreement with the $ΔY/ΔO$ value derived from M17 and the primordial helium abundance, Yp, taking into account the presence of temperature variations in this Hii region. From the M17 observations we obtain that $ΔY/ΔZ = 1.97 \pm 0.41$, in excellent agreement with two $ΔY/ΔZ$ determinations derived from K dwarf stars of the solar vicinity that amount to $2.1 \pm 0.4$ and $2.1 \pm 0.9$ respectively. We also compare our models with the solar abundances. The solar and Orion nebula O/H values are in good agreement with our chemical evolution model. | |
| dc.description | to be published in the RevMexAA in October 2008 | |
| dc.identifier | https://arxiv.org/abs/0801.2867 | |
| dc.identifier | http://arxiv.org/abs/0801.2867 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/166110 | |
| dc.subject | Astrophysics | |
| dc.title | The Helium and Heavy Elements Enrichment of the Galactic Disk | |
| dc.type | text |