Made-to-measure galaxy models - II. Elliptical and lenticular galaxies
Made-to-measure galaxy models - II. Elliptical and lenticular galaxies
复制标题
DOI：
10.1111/j.1365-2966.2012.20488.x
复制
发表时间：
2012-01
影响因子：
4.8
通讯作者：
R. J. Long;S. Mao
中科院分区：
文献类型：
--
作者：
R. J. Long;S. Mao
我们采取了24个椭圆形和透镜状星系的样本，以前分析的SAURON项目使用三个积分动力学模型与Schwarzschild方法创建，并重新分析他们使用的量身定做（M2M）的动力学建模方法。在确定星系的动态质光比（M/L值）时，两种方法得到了很好的一致性，其中80%以上的质量光比相差<10%，95%以上的质量光比相差<20%。对于全局速度弥散各向异性参数δ，我们发现类似的值，但较少的M2M模型切向各向异性相比，他们的SAURON史瓦西同行。我们的调查是迄今为止M2M方法最大的比较应用。
We take a sample of 24 elliptical and lenticular galaxies previously analysed by the SAURON project using three integral dynamical models created with Schwarzschild method, and re-analyse them using the made-to-measure (M2M) method of dynamical modelling. We obtain good agreement between the two methods in determining the dynamical mass-to-light ratios (M/L values) for the galaxies with over 80 per cent of ratios differing by <10 per cent and over 95 per cent differing by <20 per cent. We show that . For the global velocity dispersion anisotropy parameter δ, we find similar values but with fewer of the M2M models tangentially anisotropic by comparison with their SAURON Schwarzschild counterparts. Our investigation is the largest comparative application of the M2M method to date.