WHERE ARE MOST OF THE GLOBULAR CLUSTERS IN TODAY'S UNIVERSE?

被引：14

作者：

Harris, William E. ^{[1
]}

机构：

[1] McMaster Univ, Dept Phys & Astron, Hamilton, ON L8S 4M1, Canada

来源：

ASTRONOMICAL JOURNAL | 2016年 / 151卷 / 04期

基金：

加拿大自然科学与工程研究理事会;

关键词：

galaxies: star clusters: general; globular clusters: general; STAR-CLUSTERS; VIRGO CLUSTER; LUMINOSITY FUNCTION; MASS FUNCTIONS; STELLAR MASS; METAL-POOR; GALAXIES; SYSTEMS;

D O I：

10.3847/0004-6256/151/4/102

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The total number of globular clusters (GCs) in a galaxy rises continuously with the galaxy luminosity L, while the relative number of galaxies decreases with L following the Schechter function. The product of these two very nonlinear functions gives the relative number of GCs contained by all galaxies at a given L. It is shown that GCs, in this universal sense, are most commonly found in galaxies within a narrow range around L-star. In addition, blue (metal-poor) GCs outnumber the red (metal-richer) ones globally by 4 to 1 when all galaxies are added, pointing to the conclusion that the earliest stages of galaxy formation were especially favorable to forming massive, dense star clusters.

引用

页数：4

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