Ultra-diffuse galaxies without dark matter

被引：55

作者：

Silk, Joseph ^{[1
,2
,3
,4
]}

机构：

[1] Sorbonne Univ, Inst Astrophys Paris, UPMC Univ Paris 06, UMR 7095, F-75014 Paris, France

[2] CNRS, UMR 7095, F-75014 Paris, France

[3] Johns Hopkins Univ, Dept Phys & Astron, Baltimore, MD 21218 USA

[4] Univ Oxford, Beecroft Inst Particle Astrophys & Cosmol, Dept Phys, Oxford OX1 3RH, England

来源：

MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY | 2019年 / 488卷 / 01期

关键词：

galaxies: formation; cosmology: theory; dark matter; GLOBULAR-CLUSTERS; STAR-CLUSTERS; GAS; CLOUD; SCALE; FRAGMENTATION; INTERSTELLAR; POPULATION; MASS;

D O I：

10.1093/mnrasl/slz090

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

I develop a high-velocity galaxy collision model to explain a rare but puzzling phenomenon, namely the apparent existence of ultra-diffuse galaxies with little dark matter. Predictions include simultaneous triggering of overpressured dense clouds to form luminous old globular clusters, a protogroup environment to generate high relative velocities of the initially gas-rich galaxies in the early universe, and spatially separated dark haloes, possibly detectable via gravitational lensing and containing relic low-metallicity stars with enhanced alpha/Fe at ultra-low surface brightness.

引用

页码：L24 / L28

页数：5

共 50 条

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