The Lowest Metallicity Stars in the LMC: Clues from MaGICC Simulations
The Lowest Metallicity Stars in the LMC: Clues from MaGICC Simulations
复制标题
LMC 中金属丰度最低的恒星:MaGICC 模拟的线索
DOI:
10.1017/pasa.2013.20
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发表时间:
2013
影响因子:
6.3
通讯作者:
Brook C
中科院分区:
文献类型:
--
作者:
Brook C
Using a cosmological hydrodynamical simulation of a galaxy of similar mass to the Large Magellanic Cloud (LMC), we examine the predicted characteristics of its lowest metallicity populations. In particular, we emphasise the spatial distributions of first (Pop III) and second (polluted by only immediate Pop III ancestors) generation stars. We find that primordial composition stars form not only in the central galaxy’s progenitor, but also in locally collapsed subhaloes during the early phases of galaxy formation. The lowest metallicity stars in these subhaloes end up in a relatively extended distribution around the host, with these accreted stars possessing present-day galactocentric distances as great as ~40 kpc. By contrast, the earliest stars formed within the central galaxy remain in the inner region, where the vast majority of star formation occurs, for the entirety of the simulation. Consequently, the fraction of stars that are from the earliest generation increases strongly with radius.
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DOI:
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发表时间:
2010
期刊:
影响因子:
--
作者:
M. Feast;O. Abedigamba;P. Whitelock
通讯作者:
P. Whitelock
DOI:
10.1111/j.1365-2966.2009.14555.x
发表时间:
2009
影响因子:
4.8
作者:
G. Stinson;J. Dalcanton;T. Quinn;S. Gogarten;T. Kaufmann;James Wadsley McMaster University;U. Washington;UC Irvine
通讯作者:
UC Irvine
影响因子:
56.9
作者:
Suk;Young
通讯作者:
Young
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
E. Scannapieco;D. Kawata;C. Brook;R. Schneider;A. Ferrara;B. Gibson
通讯作者:
B. Gibson
DOI:
10.1086/378852
发表时间:
2003-05
期刊:
The Astrophysical Journal
影响因子:
--
作者:
N. Yoshida;Aaron Sokasian;L. Hernquist;V. Springel
通讯作者:
N. Yoshida;Aaron Sokasian;L. Hernquist;V. Springel