Could the Galactic disk heating be due to Globular Cluster impacts?
| dc.creator | Putte, D. Vande | |
| dc.creator | Cropper, Mark | |
| dc.creator | Ferreras, Ignacio | |
| dc.date | 2009-05-27 | |
| dc.date.accessioned | 2026-07-07T13:18:31Z | |
| dc.date.available | 2026-07-07T13:18:31Z | |
| dc.description | So far, six mechanisms have been proposed to account for the Galactic disk heating. Of these, the most important appear to be a combination of scattering of stars by molecular clouds and by spiral arms. We study a further mechanism, namely, the repeated disk impact of the original Galactic Globular Cluster population up to the present. We find that Globular Clusters could have contributed at most a small fraction of the current vertical energy of the disk, as they could heat the whole disk to {$σ$}$_{z}$ = 5.5kms$^{{\rm -} {\rm 1}}$ (c.f. the observed 18 and 39 kms$^{{\rm -} {\rm 1}}$ for the thick and thin disks respectively). We find that the rate of rise of disk heat ($α$=0.22 in \textit{$σ$}$_{z}$ $\sim t^α$ with \textit t being time), is close to that found for scattering by molecular clouds. | |
| dc.description | 4 pages, 1 figure, accepted for publication in MNRAS on 2009/May/14 | |
| dc.identifier | https://arxiv.org/abs/0905.4350 | |
| dc.identifier | http://arxiv.org/abs/0905.4350 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/231451 | |
| dc.subject | Astrophysics of Galaxies | |
| dc.title | Could the Galactic disk heating be due to Globular Cluster impacts? | |
| dc.type | text |