Thin and Thick Galactic Disks
| dc.creator | Nissen, Poul E. | |
| dc.date | 2003-10-13 | |
| dc.date.accessioned | 2026-07-07T02:10:21Z | |
| dc.date.available | 2026-07-07T02:10:21Z | |
| dc.description | Studies of elemental abundances in stars belonging to the thin and the thick disk of our Galaxy are reviewed. Edvardsson et al. (1993) found strong evidence of [alpha/Fe] variations among F and G main sequence stars with the same [Fe/H] and interpreted these differences as due to radial gradients in the star formation rate in the Galactic disk. Several recent studies suggest, however, that the differences are mainly due to a separation in [alpha/Fe] between thin and thick disk stars, indicating that these populations are discrete Galactic components, as also found from several kinematical studies. Further evidence of a chemical separation between the thick and the thin disk is obtained from studies of [Mn/Fe] and the ratio between r- and s-process elements. The interpretation of these new data in terms of formation scenarios and time scales for the disk and halo components of our Galaxy is discussed. | |
| dc.description | Invited review at Carnegie Observatories Centennial Symposium IV. "Origin and Evolution of the Elements". 16 pages, 9 figures. To appear in Carnegie Observatories Astrophysics Series, Vol. 4, Ed. A. McWilliam & M. Rauch (Cambridge: Cambridge Univ. Press) | |
| dc.identifier | https://arxiv.org/abs/astro-ph/0310326 | |
| dc.identifier | http://arxiv.org/abs/astro-ph/0310326 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/6711 | |
| dc.subject | Astrophysics | |
| dc.title | Thin and Thick Galactic Disks | |
| dc.type | text |