论文标题
NGC 3377的质量概况来自贝叶斯方法
The mass profile of NGC 3377 from a Bayesian approach
论文作者
论文摘要
通过球形牛仔裤分析研究了中等明亮的椭圆形NGC 3377的质量曲线，并结合了贝叶斯方法。先前的分布是由暗物质模拟和观察性约束产生的。观察数据集由双子座/GMOS的长期观测值组成，该观测值与银河系的主要和次要轴对齐，并补充了文献中的数据，用于弥漫性恒星成分，球状簇和行星烟囱。尽管假定星系替代地存在于中央和卫星光环中，但与文献结果的比较更喜欢后一种选项。考虑到恒定各向异性的几种选择，以及NFW和Einasto质量谱。该分析指向中间质量光环，在$（3.6 \ pm0.6）\ times 10^{11} \，{\ rm m _ {\ odot}} $中呈现病毒质量。
The mass profile for the moderately bright elliptical NGC 3377 is studied through an spherical Jeans analysis, combined with a Bayesian approach. The prior distributions are generated from dark matter simulations and observational constraints. The observational data set consist of Gemini/GMOS long-slit observations aligned with the major and minor axes of the galaxy, and are supplemented with data from the literature for the diffuse stellar component, globular clusters and planetary nebulae. Although the galaxy is assumed to alternatively reside in central and satellite haloes, the comparison with literature results prefer the latter option. Several options of constant anisotropy are considered, as well as both NFW and Einasto mass profiles. The analysis points to an intermediate mass halo, presenting a virial mass around $(3.6\pm0.6)\times 10^{11}\,{\rm M_{\odot}}$.
