基于三轴轨道的星系模型及其对（表观）解耦核星系NGC 4365的应用
Triaxial orbit based galaxy models with an application to the (apparent) decoupled core galaxy NGC 4365
摘要：
利用史瓦西轨道叠加方法，我们提出了一种灵活有效的方法来构造具有中心黑洞的星系的三轴动力学模型。我们的方法是通用的，可以处理现实的光度分布，投影到表面亮度分布，可能会显示位置角扭曲和椭圆度的变化。这些模型适合于全视线速度分布的测量（在可用的情况下）。我们验证了我们的方法是能够重现的三积分三轴阿贝尔模型的理论预测。在一个配套文件（范德文，德Zeeuw和范登博世），我们证明了该方法恢复相空间分布函数。我们将我们的方法应用到二维观测的E3星系NGC 4365，获得与积分场摄谱仪SAURON，并研究其内部结构，表明所观察到的运动学解耦的核心是不是物理上不同的主体和内部区域接近扁圆轴对称。
英文摘要：
We present a flexible and efficient method to construct triaxial dynamical models of galaxies with a central black hole, using Schwarzschild's orbital superposition approach. Our method is general and can deal with realistic luminosity distributions, which project to surface brightness distributions that may show position angle twists and ellipticity variations. The models are fit to measurements of the full line-of-sight velocity distribution (wherever available). We verify that our method is able to reproduce theoretical predictions of a three-integral triaxial Abel model. In a companion paper (van de Ven, de Zeeuw & van den Bosch), we demonstrate that the method recovers the phase-space distribution function. We apply our method to two-dimensional observations of the E3 galaxy NGC 4365, obtained with the integral-field spectrograph SAURON, and study its internal structure, showing that the observed kinematically decoupled core is not physically distinct from the main body and the inner region is close to oblate axisymmetric.
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