GLOBULAR-CLUSTERS AND CD FORMATION - THE CASE OF M87

被引：23

作者：

MCLAUGHLIN, DE ^{[1
]}

HARRIS, WE ^{[1
]}

HANES, DA ^{[1
]}

机构：

[1] QUEENS UNIV,DEPT PHYS,KINGSTON K7L 3N6,ONTARIO,CANADA

来源：

ASTROPHYSICAL JOURNAL | 1993年 / 409卷 / 02期

关键词：

GALAXIES; FORMATION; INDIVIDUAL; (M87); STAR CLUSTERS;

D O I：

10.1086/186856

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

New wide-field CCD photometry around M87 is used to define the radial profile for its globular cluster system over the region 1.'2 less than or similar R less than or similar 9.'2. The best-fit de Vaucouleurs profile clearly shows an excess of clusters beginning at R approximately 4.'5, just where the cD envelope of the M87 halo begins. We find that this '' extra '' cD component of the globular cluster population has the same high specific frequency as the main body of M87 does; this result is used to argue for an epoch of cD envelope formation which precedes both astration of the envelope and relaxation of the Virgo Cluster itself.

引用

页码：L45 / L48

页数：4

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