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Comparison between the Globular Clusters in NGC 5128 and the Galaxy

机译:NGC 5128和星系中球状星团的比较

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Some of the properties of the globular clusters in NGC 5128, the nearest giant elliptical galaxy, are compared to those of Galactic globular clusters. Assuming the color-metallicity relations that hold for Galactic globular clusters, one finds that the metal-poor clusters in NGC 5128 that have [Fe/H] 10 pc are typically less luminous in NGC 5128 than are their more compact counterparts. In this respect the NGC 5128 cluster system is similar to the Galactic globular cluster system, in which large clusters also tend to be less luminous than compact ones. Finally, the present data may hint at the possibility that the NGC 5128 cluster system differs from that surrounding the Milky Way, in the sense that the NGC 5128 objects do not seem to exhibit a clear-cut gap between the regions of the FWHM-Mv plane that are occupied by globular clusters and by dwarf spheroidal galaxies.
机译:将最近的巨型椭圆星系NGC 5128中的球状星团的某些特性与银河系球状星团的特性进行了比较。假定银河球状星团的颜色-金属性关系成立,人们发现NGC 5128中[Fe / H] 10 pc的贫金属星团在NGC 5128中的发光量通常比其更紧凑的对应物少。在这方面,NGC 5128群集系统类似于银河系球形群集系统,其中大型群集的发光强度也比紧凑型群集的发光强度低。最后,从NGC 5128物体似乎在FWHM-Mv区域之间似乎没有明显的间隙的意义上讲,当前数据可能暗示了NGC 5128集群系统与银河系周围系统不同的可能性。球状星团和矮球形球星系占据的平面。

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