Dark matter;
gravitational lensing;
galaxy groups;
D O I:
10.1017/S1743921316009881
中图分类号:
P1 [天文学];
学科分类号:
0704 ;
摘要:
We present the analysis of a sample of strong-lensing galaxy group candidates. Our main findings are: confirmation of group-scale systems, complex light distributions, presence of large-scale structures in their surroundings, and evidence of a strong-lensing bias in the mass concentration relation. We also report the detection of the first 'Bullet group'.