The contribution of globular clusters to cosmic reionization
The contribution of globular clusters to cosmic reionization
复制标题
球状星团对宇宙再电离的贡献
DOI:
10.1093/mnras/stab1132
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发表时间:
2021
影响因子:
4.8
通讯作者:
Boylan-Kolchin, Michael
中科院分区:
文献类型:
--
作者:
Ma, Xiangcheng;Quataert, Eliot;Wetzel, Andrew;Faucher-Giguère, Claude-André;Boylan-Kolchin, Michael
We study the escape fraction of ionizing photons (fesc) in two cosmological zoom-in simulations of galaxies in the reionization era with halo massMhalo∼ 1010and(stellar massM*∼ 107and) atz= 5 from the Feedback in Realistic Environments project. These simulations explicitly resolve the formation of proto-globular clusters (GCs) self-consistently, where 17–39 per cent of stars form in bound clusters during starbursts. Using post-processing Monte Carlo radiative transfer calculations of ionizing radiation, we computefescfrom cluster stars and non-cluster stars formed during a starburst over ∼100 Myr in each galaxy. We find that the averagedfescover the lifetime of a star particle follows a similar distribution for cluster stars and non-cluster stars. Clusters tend to have lowfescin the first few Myr, presumably because they form preferentially in more extreme environments with high optical depths; thefescincreases later as feedback starts to destroy the natal cloud. On the other hand, some non-cluster stars formed between cluster complexes or in the compressed shells at the front of a superbubble can also have highfesc. We find that cluster stars on average have comparablefescto non-cluster stars. This result is robust across several star formation models in our simulations. Our results suggest that the fraction of ionizing photons from proto-GCs to cosmic reionization is comparable to the cluster formation efficiencies in high-redshift galaxies and thus proto-GCs likely contribute an appreciable fraction of photons but are not the dominant sources for reionization.
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DOI:
--
发表时间:
2002
期刊:
影响因子:
--
作者:
M. Ricotti
通讯作者:
M. Ricotti
DOI:
10.3847/1538-4357/834/1/40
发表时间:
2016
期刊:
The Astrophysical Journal
影响因子:
--
作者:
Corey S. Howard;R. Pudritz;R. Klessen
通讯作者:
R. Klessen
影响因子:
4.8
作者:
Smith, Aaron;Ma, Xiangcheng;Bromm, Volker;Finkelstein, Steven L;Hopkins, Philip F;Faucher-Giguère, Claude-André;Kereš, Dušan
通讯作者:
Kereš, Dušan
影响因子:
4.8
作者:
Xiangcheng Ma;E. Quataert;A. Wetzel;P. Hopkins;C. Faucher-Giguère;D. Keres̆
通讯作者:
Xiangcheng Ma;E. Quataert;A. Wetzel;P. Hopkins;C. Faucher-Giguère;D. Keres̆
影响因子:
4.8
作者:
Ma, Xiangcheng;Hopkins, Philip F;Boylan-Kolchin, Michael;Faucher-Giguère, Claude-André;Quataert, Eliot;Feldmann, Robert;Garrison-Kimmel, Shea;Hayward, Christopher C;Kereš, Dušan;Wetzel, Andrew
通讯作者:
Wetzel, Andrew