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Group Velocity of Spiral Waves in Galactic Disks
Abstract
Studied here are density waves of the kind proposed especially by Lin to explain the spiral structures of disk galaxies. It is shown that any packet of such waves propagates radially (and toward increasingly short wavelengths) with a group velocity that is sufficient to obliterate it within a few galactic revolutions This does not necessarily mean that the density-wave hypothesis is wrong. But it does imply that any existing spiral waves in the disk of a galaxy must somehow be replenished if their pattern as a whole is to persist. Three conceivable sources of such replenishment are also discussed in this paper
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Citations
Cited by
Tanaka, H., Takeuchi, T., & Ward, W. R. (2002) · The Astrophysical Journal · doi:10.1086/324713 · Cited by 1,076
Kronberg, P. P. (1994) · Reports on Progress in Physics · doi:10.1088/0034-4885/57/4/001 · Cited by 1,015
The ACS Virgo Cluster Survey. VI. Isophotal Analysis and the Structure of Early‐Type Galaxies
Ferrarese, L., Cote, P., Jordan, A., Peng, E. W., Blakeslee, J. P., Piatek, S., Mei, S., Merritt, D., Milosavljević, M., Tonry, J. L., et al. (2006) · The Astrophysical Journal Supplement Series · doi:10.1086/501350 · Cited by 592
The Frequency of Barred Spiral Galaxies in the Near-Infrared
Eskridge, P. B., Frogel, J. A., Pogge, R. W., Quillen, A. C., Davies, R. L., DePoy, D. L., Houdashelt, M. L., Kuchinski, L. E., Ramírez, S. V., Sellgren, K., et al. (2000) · The Astronomical Journal · doi:10.1086/301203 · Cited by 522
Bland-Hawthorn, J., Sharma, S., Tepper-Garcia, T., Binney, J., Freeman, K. C., Hayden, M. R., Kos, J., De Silva, G. M., Ellis, S., Lewis, G. F., et al. (2019) · Monthly Notices of the Royal Astronomical Society · doi:10.1093/mnras/stz217 · Cited by 224
Metadata
- Authors
- Toomre, A.
- Venue
- The Astrophysical Journal
- Publisher
- American Astronomical Society
- Published
- 1969-12
- Volume
- 158
- Pages
- 899
- ISSN
- 0004-637X (ISSN-L)
- 1538-4357
- OpenAlex
- W2092458366
- Cited by
- 292
- References
- 0
- FWCI
- 8.23
- Type
- journal article
- Language
- en
- Open access
- closed
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- Toomre, A. (1969). Group Velocity of Spiral Waves in Galactic Disks. The Astrophysical Journal. https://doi.org/10.1086/150250
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