The mass fraction of halo stars contributed by the disruption of globular clusters in the E-MOSAICS simulations
The mass fraction of halo stars contributed by the disruption of globular clusters in the E-MOSAICS simulations
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E-MOSAICS 模拟中球状星团破裂所贡献的晕星质量分数
DOI:
10.1093/mnras/staa483
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发表时间:
2020
影响因子:
4.8
通讯作者:
Grebel E
中科院分区:
文献类型:
--
作者:
Grebel E
Globular clusters (GCs) have been posited, alongside dwarf galaxies, as significant contributors to the field stellar population of the Galactic halo. In order to quantify their contribution, we examine the fraction of halo stars formed in stellar clusters in the suite of 25 present-day Milky Way-mass cosmological zoom simulations from theE-MOSAICSproject. We find that a median of 2.3 and 0.3 per cent of the mass in halo field stars formed in clusters and GCs, defined as clusters more massive than 5 × 103and 105M⊙, respectively, with the 25–75th percentiles spanning 1.9–3.0 and 0.2–0.5 per cent being caused by differences in the assembly histories of the host galaxies. Under the extreme assumption that no stellar cluster survives to the present day, the mass fractions increase to a median of 5.9 and 1.8 per cent. These small fractions indicate that the disruption of GCs plays a subdominant role in the build-up of the stellar halo. We also determine the contributed halo mass fraction that would present signatures of light-element abundance variations considered to be unique to GCs, and find that clusters and GCs would contribute a median of 1.1 and 0.2 per cent, respectively. We estimate the contributed fraction of GC stars to the Milky Way halo, based on recent surveys, and find upper limits of 2–5 per cent (significantly lower than previous estimates), suggesting that models other than those invoking strong mass loss are required to describe the formation of chemically enriched stellar populations in GCs.
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DOI:
--
发表时间:
2009
期刊:
影响因子:
--
作者:
J. Kruijssen;S. Mieske
通讯作者:
S. Mieske
DOI:
--
发表时间:
2015
期刊:
Proceedings of the International Astronomical Union
影响因子:
--
作者:
E. Carretta
通讯作者:
E. Carretta
影响因子:
6.5
作者:
S. Larsen;J. Strader;J. P. F. R. U. Nijmegen;The Netherlands.;Harvard-Smithsonian Cfa;Usa;M. University;UCOLick Observatory
通讯作者:
S. Larsen;J. Strader;J. P. F. R. U. Nijmegen;The Netherlands.;Harvard-Smithsonian Cfa;Usa;M. University;UCOLick Observatory
DOI:
--
发表时间:
2021
期刊:
影响因子:
--
作者:
M. Hughes;J. Pfeffer;M. Martig;N. Bastian;R. Crain;J. Kruijssen;M. Reina
通讯作者:
M. Reina
影响因子:
4.8
作者:
M. Reina;J. Kruijssen;J. Pfeffer;N. Bastian;R. Crain
通讯作者:
R. Crain