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- W2952420199 abstract "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 {$sigma $}$_{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 ($alpha$=0.22 in textit{$sigma $}$_{z}$ $sim t^{alpha}$ with textit t being time), is close to that found for scattering by molecular clouds." @default.
- W2952420199 created "2019-06-27" @default.
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- W2952420199 date "2009-05-27" @default.
- W2952420199 modified "2023-09-27" @default.
- W2952420199 title "Could the Galactic disk heating be due to Globular Cluster impacts" @default.
- W2952420199 hasPublicationYear "2009" @default.
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