GLOBAL SPIRAL ARMS FORMATION BY NON-LINEAR INTERACTION OF WAKELETS Article Swipe
Jun Kumamoto
,
Masafumi Noguchi
·
YOU?
·
· 2016
· Open Access
·
· DOI: https://doi.org/10.3847/0004-637x/822/2/110
YOU?
·
· 2016
· Open Access
·
· DOI: https://doi.org/10.3847/0004-637x/822/2/110
The formation and evolution of galactic spiral arms is not yet clearly understood despite much analytic and numerical work. Recently, the new idea has been proposed that local density enhancements (wakelets) arising in the galactic disk connect with each other and make global spiral arms. However, the understanding of this mechanism is not yet sufficient. We analyze the interaction of wakelets by using N -body simulations, including perturbing point masses, which are heavier than individual N -body particles and act as the seeds for wakelets. Our simulation facilitates a more straightforward interpretation of numerical results than previous works by putting a certain number of perturbers in a well-motivated configuration. We detected a clear sign of non-linear interaction between wakelets, which make global spiral arms by connecting two adjacent wakelets. We found that the wavenumber of the strongest non-linear interaction depends on galactic disk mass and shear rate. This dependence is consistent with the prediction of a swing amplification mechanism and other previous results. Our results unify previous results that were consistent with each other.
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Metadata
- Type
- article
- Language
- en
- Landing Page
- https://doi.org/10.3847/0004-637x/822/2/110
- OA Status
- green
- Cited By
- 16
- References
- 39
- Related Works
- 10
- OpenAlex ID
- https://openalex.org/W2325933408
All OpenAlex metadata
Raw OpenAlex JSON
- OpenAlex ID
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https://openalex.org/W2325933408Canonical identifier for this work in OpenAlex
- DOI
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https://doi.org/10.3847/0004-637x/822/2/110Digital Object Identifier
- Title
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GLOBAL SPIRAL ARMS FORMATION BY NON-LINEAR INTERACTION OF WAKELETSWork title
- Type
-
articleOpenAlex work type
- Language
-
enPrimary language
- Publication year
-
2016Year of publication
- Publication date
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2016-05-10Full publication date if available
- Authors
-
Jun Kumamoto, Masafumi NoguchiList of authors in order
- Landing page
-
https://doi.org/10.3847/0004-637x/822/2/110Publisher landing page
- Open access
-
YesWhether a free full text is available
- OA status
-
greenOpen access status per OpenAlex
- OA URL
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https://arxiv.org/pdf/1603.08761Direct OA link when available
- Concepts
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Spiral (railway), Physics, Mathematics, Mathematical analysisTop concepts (fields/topics) attached by OpenAlex
- Cited by
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16Total citation count in OpenAlex
- Citations by year (recent)
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2025: 1, 2024: 2, 2022: 1, 2021: 1, 2020: 2Per-year citation counts (last 5 years)
- References (count)
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39Number of works referenced by this work
- Related works (count)
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10Other works algorithmically related by OpenAlex
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