Correlation of morphological fraction with redshift in galaxy clusters

Correlation of morphological fraction with redshift in galaxy clusters
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形态分数与星系团红移的相关性

DOI:
10.1017/s1743921314004979
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发表时间:
2012-08
期刊:
Proceedings of the International Astronomical Union / Volume 10 / Highlights H16 / August 2012, pp 136-136
影响因子:
--
通讯作者:
*Qi-Rong Yuan, Qiang-Qiang Dang, Peng-Fei Yan, Wei Chen
*Qi-Rong Yuan, Qiang-Qiang Dang, Peng-Fei Yan, Wei Chen
中科院分区:
其他
文献类型:
--
作者:
*Qi-Rong Yuan, Qiang-Qiang Dang, Peng-Fei Yan, Wei Chen

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相似文献

本文根据宇宙演化巡天(COSMOS)观测场中由星系光度红移识别出的187个星系团,(Wen & Han 2011),根据Ilbert等人(2009)提供的光谱能量分布(SED)的最佳拟合模板,比MV = -20.5更亮的星系团星系被分为四类:早期型(包括椭圆和透镜状)星系(E+ S 0),螺旋星系(S),不规则星系(Irr)和星爆(SB)。这四种SED类型的分数在图1中以红移的函数形式呈现。每个类别的分数随星系团红移而显著变化:正常星系的分数(E+ S 0 +S+Irr)倾向于随红移而减少,而星暴的比例则倾向于随红移而增加。对于正常星系,形态分数的斜率存在一个递减序列。高红移星系团(z > 1.0)中的大多数星系都经历着强烈的恒星形成活动,这导致了很高比例的星暴。
Abstract Based on 187 galaxy clusters identified from the photometric redshifts of galaxies in the Cosmic Evolution Survey (COSMOS) field(Wen & Han 2011), cluster galaxies brighter than MV = -20.5 are classified into four categories according to their best-fitting templates of the spectral energy distributions (SEDs) provided by Ilbert et al. (2009): early-type (including elliptical and lenticular) galaxies (E+S0), spiral galaxies (S), irregular galaxies (Irr), and starbursts (SB). The fractions of these four SED types are presented as the functions of redshift in Figure 1. Fraction of each category varies remarkably with cluster redshift: fractions of normal galaxies (E+S0+S+Irr) tend to decrease with redshift, whilst the starburst proportion tends to increase with redshift. For the normal galaxies, there exists a sequence for the decreasing slopes of morphological fractions. Majority of the galaxies in high-redshift clusters (z > 1.0) are experiencing strong star-formation activities, which leads to a very high proportion of starburst.
DOI: 10.1088/0004-637x/690/2/1236
发表时间: 2008-09
期刊: The Astrophysical Journal
影响因子: --
作者:
O. Ilbert;P. Capak;M. Salvato;H. Aussel;H. McCracken;D. Sanders;N. Scoville;J. Kartaltepe;S. A
通讯作者: O. Ilbert;P. Capak;M. Salvato;H. Aussel;H. McCracken;D. Sanders;N. Scoville;J. Kartaltepe;S. A
DOI: 10.1088/0004-637x/734/1/68
发表时间: 2011-04
期刊: The Astrophysical Journal
影响因子: --
作者:
Z. Wen;J. Han
通讯作者: Z. Wen;J. Han