Optical Tracers of Spiral Wave Resonances in Galaxies: II. Hidden Three-Arm Spirals in a Sample of 18 Galaxies
Optical Tracers of Spiral Wave Resonances in Galaxies: II. Hidden Three-Arm Spirals in a Sample of 18 Galaxies
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星系中螺旋波共振的光学示踪剂：II。
DOI：
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发表时间：
1991
期刊：
影响因子：
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通讯作者：
L. Montenegro
中科院分区：
文献类型：
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作者：
B. Elmegreen;D. Elmegreen;L. Montenegro
计算机增强的星系图像揭示了具有三个对称臂的螺旋结构，这些对称臂延伸到双臂螺旋外半径的25%到85%之间。许多包含多臂或其他复杂螺旋的星系都是简单的双臂和三臂结构的叠加。在大多数情况下，三臂螺旋似乎正好从内部3：1共振延伸到外部3：1共振，并且更突出的双臂螺旋开始于内部2：1共振之外并延伸到外部2：1共振
Computer-enhanced galaxy images reveal underlying spiral structures with three symmetric arms that extend between ∼25% and ∼85% of the outer radii of the two-arm spirals. Many of the galaxies containing multiple arms or other complex spirals are clear superpositions of simple two- and three-arm structures. The three-arm spirals appear to extend exactly from the inner to the outer 3:1 resonances in most cases, and the more prominent two-arm spirals begin outside the inner 2:1 resonance and extend to the outer 2:1 resonance