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Radial mixing in galactic discs
Open accessAbstract
We show that spiral waves in galaxy discs churn the stars and gas in a manner that largely preserves the overall angular momentum distribution and leads to little increase in random motion. Changes in the angular momenta of individual stars are typically as large as ∼50 per cent over the lifetime of the disc. The changes are concentrated around the corotation radius for an individual spiral wave, but since transient waves with a wide range of pattern speeds develop in rapid succession, the entire disc is affected. This behaviour has profound consequences for the metallicity gradients with radius in both stars and gas, since the interstellar medium is also stirred by the same mechanism. We find observational support for stirring, propose a simple model for the distribution of stars over metallicity and age, and discuss other possible consequences.
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Citations
Cited by
The Apache Point Observatory Galactic Evolution Experiment (APOGEE)
Majewski, S. R., Schiavon, R. P., Frinchaboy, P. M., Prieto, C. A., Barkhouser, R., Bizyaev, D., Blank, B., Brunner, S., Burton, A., Carrera, R., et al. (2017) · The Astronomical Journal · doi:10.3847/1538-3881/aa784d · Cited by 1,831
The Galaxy in Context: Structural, Kinematic, and Integrated Properties
Bland-Hawthorn, J., & Gerhard, O. (2016) · Annual Review of Astronomy and Astrophysics · doi:10.1146/annurev-astro-081915-023441 · Cited by 1,656
Chemical evolution with radial mixing
Schönrich, R., & Binney, J. (2009) · Monthly Notices of the Royal Astronomical Society · doi:10.1111/j.1365-2966.2009.14750.x · Cited by 722
Self-citationHaywood, M., Di Matteo, P., Lehnert, M. D., Katz, D., & Gómez, A. (2013) · Astronomy & Astrophysics · doi:10.1051/0004-6361/201321397 · Cited by 553
Riding the Spiral Waves: Implications of Stellar Migration for the Properties of Galactic Disks
Roškar, R., Debattista, V. P., Quinn, T. R., Stinson, G. S., & Wadsley, J. (2008) · The Astrophysical Journal · doi:10.1086/592231 · Cited by 501
Metadata
- Authors
- Sellwood, J. A., & Binney, J. J.
- Venue
- Monthly Notices of the Royal Astronomical Society
- Publisher
- Oxford University Press (OUP)
- Published
- 2002-11-01
- Volume
- 336
- Issue
- 3
- Pages
- 785-796
- ISSN
- 0035-8711 (ISSN-L)
- 1365-2966
- OpenAlex
- W2142824603
- Cited by
- 1,054
- References
- 0
- FWCI
- 5.50
- Type
- journal article
- Language
- en
- Open access
- bronze
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- Sellwood, J. A., & Binney, J. J. (2002). Radial mixing in galactic discs. Monthly Notices of the Royal Astronomical Society. https://doi.org/10.1046/j.1365-8711.2002.05806.x
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Contains information from the Semantic Scholar Academic Graph Datasets, made available under the ODC Attribution License (ODC-BY 1.0).
Semantic Scholar’s data is described in: Kinney, R., et al. (2023). The Semantic Scholar Open Data Platform. arXiv:2301.10140.
