A possible formation scenario for dwarf spheroidal galaxies - I. Fiducial model
A possible formation scenario for dwarf spheroidal galaxies - I. Fiducial model
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矮椭球星系可能的形成情景 - I. 基准模型
DOI:
10.1093/mnras/stt458
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发表时间:
2013
影响因子:
4.8
通讯作者:
Assmann P
中科院分区:
文献类型:
--
作者:
Assmann P
We perform numerical simulations to study a formation scenario for dwarf spheroidal (dSph) galaxies in which their stellar populations are the products of the dissolution of open star clusters and stellar associations within cosmological dark matter haloes. This paper shows that this process gives rise to objects which resemble the observed dSph satellites of the Milky Way without invoking external influences. The presence of long-lived kinematic substructures within the stellar components of these objects affects their projected velocity dispersions. We find that this in turn affects mass estimates based on the projected velocity dispersion profiles which may overestimate the actual dark matter halo mass depending on the amount of substructure which is present. Our models make predictions about the detailed kinematic and photometric properties of the dSphs which can be tested using future observations.
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DOI:
10.1086/375522
发表时间:
2003-04
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
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通讯作者:
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DOI:
10.1111/j.1365-2966.2006.10720.x
发表时间:
2006
影响因子:
4.8
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DOI:
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发表时间:
2009
期刊:
影响因子:
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作者:
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通讯作者:
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DOI:
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发表时间:
2008
影响因子:
4.8
作者:
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通讯作者:
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DOI:
10.1086/497396
发表时间:
2005
期刊:
The Astrophysical Journal Letters
影响因子:
--
作者:
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通讯作者:
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