Formation of proto-globular cluster candidates in cosmological simulations of dwarf galaxies at z > 4
Formation of proto-globular cluster candidates in cosmological simulations of dwarf galaxies at z > 4
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z > 4 矮星系宇宙学模拟中原球状星团候选的形成
DOI:
10.1093/mnras/stad1071
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发表时间:
2023
影响因子:
4.8
通讯作者:
Schauer, Anna T. P.
中科院分区:
文献类型:
--
作者:
Sameie, Omid;Boylan-Kolchin, Michael;Hopkins, Philip F.;Wetzel, Andrew;Ma, Xiangcheng;Bullock, James S.;El-Badry, Kareem;Quataert, Eliot;Samuel, Jenna;Schauer, Anna T. P.
We perform cosmological hydrodynamical simulations to study the formation of proto-globular cluster candidates in progenitors of present-day dwarf galaxiesatz= 0) as part of the ‘Feedback in Realistic Environment’ (FIRE) project. Compact (r1/2< 30 pc), relatively massive (0.5 × 105≲M⋆/M⊙≲ 5 × 105), self-bound stellar clusters form at 11 ≳z≳ 5 in progenitors with. Cluster formation is triggered when at leastof dense, turbulent gas reachesas a result of the compressive effects of supernova feedback or from cloud–cloud collisions. The clusters can survive for; absent numerical effects, they could possibly survive substantially longer, perhaps toz= 0. The longest lived clusters are those that form at significant distance – several hundreds of pc – from their host galaxy. We therefore predict that globular clusters forming in progenitors of present-day dwarf galaxies will be offset from any pre-existing stars within their host dark matter haloes as opposed to deeply embedded within a well-defined galaxy. Properties of the nascent clusters are consistent with observations of some of the faintest and most compact high-redshift sources inHubble Space Telescopelensing fields and are at the edge of what will be detectable as point sources in deep imaging of non-lensed fields withJWST. By contrast, the star clusters’ host galaxies will remain undetectable.
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DOI:
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发表时间:
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