标题： 非常扁平的正常星系的内部动力学：NGC 4697的恒星分布函数 显示英文标题

标题： The internal dynamics of very flattened normal galaxies: Stellar distribution functions for NGC 4697

摘要： 使用测光和运动学数据，其中一部分是用NTT获得的，我们构建了一个二积分和一个三积分分布函数用于NGC 4697。 我们在$3.4''$或距离中心0.4 kpc处检测到了核尘埃带。 比较Lucy反投影方法和多高斯展开方法表明，后者具有诸多优势，其中包括定性上更好的拟合和更好的可控收敛性。 此外，我们表明，只要允许Satoh参数$k$变化，就不能排除二积分模型。 三积分模型基于一个Stäckel第三积分。 在适当的地方保留原始势场，以最小化由于Stäckel近似引起的误差。 总体而言，三积分模型比二积分模型产生了更令人满意的结果，并且在处理运动学数据中的一些特殊性方面更好。 对于两种模型，我们展示了所有反投影矩的详细等值线图，直到二阶。 质量与光度比似乎是一个相当确定的$(M/L)_B=4.8h_{50}$，并且比具有类似数据的球形各向异性模型要约束得更好。 显示英文摘要

摘要： Using the photometry and the kinematic data, part of which acquired with the NTT, we constructed a 2-integral and a 3-integral distribution function for NGC 4697. We detected a nuclear dust lane at $3.4''$ or 0.4 kpc from the centre. A comparison of the Lucy-deprojection method and the multi-gaussian expansion method showed that the latter offers a number of advantages, among which a qualitatively better fit and better controllable convergence. Futhermore, we show that a 2-integral model cannot be excluded for as far as the Satoh parameter $k$ is allowed to vary. The 3-integral model is based on a St\"ackel third integral. The original potential is retained where appropriate, in order to minimise errors due to the St\"ackel approximation. On the whole, the 3-integral model produces more satisfying results than the 2-integral model, and is better in handling some peculiarities in the kinematic data. For both models we show detailed contour plots for all deprojected moments up to order 2. The mass-to-light ratio appears to be a fairly well determined $(M/L)_B=4.8h_{50}$, and is much better constrained than would be the case for spherical anisotropic models with comparable data.