Journal article
Secular Evolution of the Galactic Disk
- Abstract:
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In the solar-neighbourhood, older stars have larger random velocities than younger ones. It is argued that the increase in velocity dispersion with time is predominantly a gradual process rather than one induced by discrete events such as minor mergers. Ephemeral spiral arms seem to be the fundamental drivers of disk heating, although scattering by giant molecular clouds plays an important moderating role. In addition to heating the disk, spiral arms cause stars' guiding centres to diffuse ra...
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Bibliographic Details
- Publication date:
- 2000-09-20
Item Description
- Keywords:
- Pubs id:
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pubs:167452
- UUID:
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uuid:c8e42954-a5fe-48f1-8a3e-632961dd1691
- Local pid:
- pubs:167452
- Source identifiers:
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167452
- Deposit date:
- 2013-02-20
Terms of use
- Copyright date:
- 2000
- Notes:
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8 pages to appear in Galaxy Disks and Disk Galaxies, ASP Conf.Ser.,
eds E.M. Corsini and J.G. Funes
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