Dust properties of Lyman-break galaxies in cosmological simulations
Dust properties of Lyman-break galaxies in cosmological simulations
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宇宙学模拟中莱曼断裂星系的尘埃特性
DOI:
10.1093/mnras/stu169
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发表时间:
2014
期刊:
影响因子:
--
通讯作者:
J.-H.
中科院分区:
文献类型:
--
作者:
Yajima;H.;Nagamine;K.;Thompson;R.;Choi;J.-H.
Recent observations have indicated the existence of dust in high-redshift galaxies, however, the dust properties in them are still unknown. Here we present theoretical constraints on dust properties in Lyman-break galaxies (LBGs) atz= 3 by post-processing a cosmological smoothed particle hydrodynamics simulation with radiative transfer calculations. We calculate the dust extinction in 2800 dark matter haloes using the metallicity information of individual gas particles in our simulation. We use only bright galaxies with rest-frame ultraviolet (UV) magnitudeM1700< −20 mag, and study the dust size, dust-to-metal mass ratio, and dust composition. From the comparison of calculated colour excess betweenBandVband [i.e.E(B−V)] and the observations, we constrain the typical dust size, and show that the best-fitting dust grain size is ∼ 0.05 μm, which is consistent with the results of theoretical dust models for Type II supernova. Our simulation with the dust extinction effect can naturally reproduce the observed rest-frame UV luminosity function of LBGs atz= 3 without assuming an ad hoc constant extinction value. In addition, in order to reproduce the observed meanE(B−V), we find that the dust-to-metal mass ratio needs to be similar to that of the local galaxies, and that the graphite dust is dominant or at least occupy half of dust mass.
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DOI:
--
发表时间:
2010
期刊:
The Astrophysical Journal 708
影响因子:
--
作者:
Kobayashi;Masakazu A.R.; Totani;Tomonori ; Nagashima;Masahiro
通讯作者:
Masahiro
影响因子:
8.7
作者:
Komatsu, E.;Smith, K. M.;Wright, E. L.
通讯作者:
Wright, E. L.
DOI:
--
发表时间:
2010
期刊:
影响因子:
--
作者:
K. Nagamine;Jun;H. Yajima
通讯作者:
H. Yajima
DOI:
10.1111/j.1365-2966.2008.14297.x
发表时间:
2008
影响因子:
4.8
作者:
Jun;K. Nagamine
通讯作者:
K. Nagamine
DOI:
10.1088/0004-637x/776/1/35
发表时间:
2013
期刊:
The Astrophysical Journal
影响因子:
--
作者:
T. Kimm;R. Cen
通讯作者:
R. Cen