Quiescent luminous red galaxies as cosmic chronometers: on the significance of mass and environmental dependence
Quiescent luminous red galaxies as cosmic chronometers: on the significance of mass and environmental dependence
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作为宇宙计时器的静态发光红色星系：关于质量和环境依赖性的重要性
DOI：
10.1051/0004-6361/201525863
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发表时间：
2015-09
影响因子：
6.5
通讯作者：
Zhao Y. H.
中科院分区：
文献类型：
--
作者：
Liu G. C.;Lu Y. J.;Xie L. Z.;Chen X. L.;Zhao Y. H.
大质量发光红色星系（LRGs）被认为是被动进化的，可以用作宇宙计时器来估计哈勃常数。然而，不同的LRG可以位于不同的环境中。环境效应可能会限制LRG作为宇宙计时器的使用。我们的目标是调查的环境和质量的依赖形成的'静态' LRGs从斯隆数字巡天日期发布8，铺平了道路，使用LRGs作为宇宙计时器。利用星族合成软件STARLIGHT，通过全谱拟合得到各LRG的星族，并得到各LRG的平均年龄分布和平均星星形成历史（SFH）。我们发现，有没有明显的依赖性的平均年龄和SFH的静态LRGs对他们的环境，而这些静态LRGs的年龄依赖于他们的质量弱。我们比较了SDSS LRGs的SFH与从半解析星系形成模型中获得的SFH，发现如果我们考虑STARLIGHT导出年龄中的误差，它们大致一致。我们发现，LRGs中的一小部分后期星星形成导致微分年龄法对哈勃常数的系统性高估（~ 28%），而星光年龄法的系统性误差可能导致对哈勃常数的低估（~ 16%）。然而，这些错误可以通过详细研究这些LRG的平均SFH和校准星光导出的年龄独立获得的其他方法来纠正。环境效应对LRGs年龄的影响不显著，LRGs作为一个整体可以作为宇宙计时器。
Massive luminous red galaxies (LRGs) are believed to be evolving passively and can be used as cosmic chronometers to estimate the Hubble constant. However, different LRGs may be located in different environments. The environmental effects may limit the use of the LRGs as cosmic chronometers. We aim to investigate the environmental and mass dependence of the formation of 'quiescent' LRGs selected from the Sloan Digital Sky Survey Date Release 8 and to pave the way for using LRGs as cosmic chronometers. Using the population synthesis software STARLIGHT, we derive the stellar populations in each LRG through the full spectrum fitting and obtain the mean age distribution and the mean star formation history (SFH) of those LRGs. We find that there is no apparent dependence of the mean age and the SFH of quiescent LRGs on their environment, while the ages of those quiescent LRGs depend weakly on their mass. We compare the SFHs of the SDSS LRGs with those obtained from a semi-analytical galaxy formation model, and find that they are roughly consistent with each other if we consider the errors in the STARLIGHT-derived ages. We find that a small fraction of later star formation in LRGs leads to a systematical overestimation (~28 %) of the Hubble constant by the differential age method, and the systematical errors in the STARLIGHT-derived ages may lead to an underestimation (~ 16 %) of the Hubble constant. However, these errors can be corrected by a detailed study of the mean SFH of those LRGs and by calibrating the STARLIGHT-derived ages to those obtained independently by other methods. The environmental effects do not play significant role in the age estimates of quiescent LRGs, and the quiescent LRGs as a population can be used securely as cosmic chronometers.
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DOI：
10.1111/j.1365-2966.2010.17074.x
发表时间：
2009-12
影响因子：
4.8
作者：
A. Pasquali;A. Gallazzi;F. Fontanot;F. V. D. Bosch;G. Lucia;H. Mo;Xiaohu Yang
通讯作者：
A. Pasquali;A. Gallazzi;F. Fontanot;F. V. D. Bosch;G. Lucia;H. Mo;Xiaohu Yang
影响因子：
4.8
作者：
Hong Guo;Zheng Zheng-Zheng;I. Zehavi;Haojie Xu;D. Eisenstein;D. Weinberg;N. Bahcall;A. Berlind;
通讯作者：
Hong Guo;Zheng Zheng-Zheng;I. Zehavi;Haojie Xu;D. Eisenstein;D. Weinberg;N. Bahcall;A. Berlind;
DOI：
10.1111/j.1365-2966.2007.12818.x
发表时间：
2007-12
影响因子：
4.8
作者：
F. S. Liu;F. S. Liu;X. Xia;Shude Mao;Shude Mao;Hong Wu;Z. Deng
通讯作者：
F. S. Liu;F. S. Liu;X. Xia;Shude Mao;Shude Mao;Hong Wu;Z. Deng
DOI：
10.1086/340549
发表时间：
2001-06
期刊：
The Astrophysical Journal
影响因子：
--
作者：
R. Jimenez;A. Loeb
通讯作者：
R. Jimenez;A. Loeb
DOI：
10.1088/1475-7516/2012/07/053
发表时间：
2012-01
期刊：
arXiv: Cosmology and Nongalactic Astrophysics
影响因子：
--
作者：
Michele Moresco;L. Verde;L. Pozzetti;R. Jimenez;A. Cimatti
通讯作者：
Michele Moresco;L. Verde;L. Pozzetti;R. Jimenez;A. Cimatti