Cluster galaxies in XMMU J2235-2557: galaxy population properties in most massive environments at z ∼1.4
Cluster galaxies in XMMU J2235-2557: galaxy population properties in most massive environments at z ∼1.4
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XMMU J2235-2557 中的星系团：z ≤1 4 处大多数大质量环境中的星系群特性
DOI：
10.1051/0004-6361/201015251
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发表时间：
2010
影响因子：
6.5
通讯作者：
Fassbender
中科院分区：
文献类型：
--
作者：
Strazzullo;Rosati;Pannella;Santos;Nonino;Demarco;Lidman;Tanaka;Mullis;Nuñez;Rettura;Böhringer;Bender;Bouwens;Dawson;Fassbender
我们提出了一个多波长的研究星系人口的核心的大规模，X射线发光集群XMMU J2235 atz= 1.39，基于高品质的VLT和HST测光在光学和近红外波长。我们导出了z，H，和Ks波段的光度函数，近似对应于restframeU，Randz波段。这显示了一个与平坦一致的暗端斜率，以及一个接近于局部大质量星团被动演化预测的特征星等M，其形成红移> 2。色-星等图和色-质量图显示了大质量星系的紧密红色序列（内禀散射系数为0.08）已经存在的证据，整体上有古老的恒星群和早期的形态。除了红色之外，这些大质量（>6 × 1010 M/yr）星系通常还表现出早期类型的光谱特征，静止帧远紫外辐射与非常低的星星形成率（SFR<0.2 M/yr-1）相一致。形成星星的光谱成员，其SFR高达~ 100 M/年，都位于星团中心距离为1.250 kpc，星团中心区域已经出现有效的淬灭。在研究区域内，大部分质量超过6 × 1010 M的星系团星系似乎没有显著水平的星星形成。在这个星系团的核心的星系人口的高质量端似乎是在一个非常先进的演化阶段，不仅在恒星人口的形成，而且在恒星质量的组装。银河系恒星质量函数的高质量端基本上已经存在。恒星质量分数估计在r500以内（~ 1%，Kroupa IMF）已经与本地大质量星团的质量分数相似。另一方面，大质量红色序列星系的表面亮度分布模型可能表明，它们的大小往往比基于局部恒星质量与大小关系的预期要小。恒星质量与大小关系的演化可能意味着，尽管这些源的整体早期组装，但它们的演化并不完整，并且像小（可能是干）合并这样的过程仍然可能塑造这些物体的结构特性，使其类似于它们的本地对应物，而不会实质上影响它们的恒星质量或宿主恒星的种群。尽管如此，一个明确的结论的实际相关性的大小演变的研究早期类型的样品是排除可能的系统学和偏见。
We present a multi-wavelength study of galaxy populations in the core of the massive, X-ray luminous cluster XMMU J2235 atz= 1.39, based on high quality VLT and HST photometry at optical and near-infrared wavelengths. We derive luminosity functions in thez,H, andKsbands, approximately corresponding to restframeU,Randzband. These show a faint-end slope consistent with being flat, and a characteristic magnitudeM∗close to passive evolution predictions ofM∗of local massive clusters, with a formation redshiftz> 2. The color − magnitude and color-mass diagrams show evidence of a tight red sequence (intrinsic scatter ≲ 0.08) of massive galaxies already in place, with overall old stellar populations and generally early-type morphology. Beside the red colors, these massive (>6 × 1010M⊙) galaxies typically show early-type spectral features, and rest-frame far-UV emission consistent with very low star formation rates (SFR< 0.2M⊙yr-1). Star forming spectroscopic members, with SFR of up to ~100M⊙/yr, are all located at clustercentric distances ≳ 250 kpc, with the central cluster region already appearing effectively quenched. Most part of the cluster galaxies more massive than 6 × 1010M⊙within the studied area do not appear to host significant levels of star formation. The high-mass end of the galaxy populations in the core of this cluster appears to be in a very advanced evolutionary stage, not only in terms of formation of the stellar populations, but also of the assembly of the stellar mass. The high-mass end of the galaxy stellar mass function is essentially already in place. The stellar mass fraction estimated withinr500(~1%, Kroupa IMF) is already similar to that of local massive clusters. On the other hand, surface brightness distribution modeling of the massive red sequence galaxies may suggest that their size is often smaller than expected based on the local stellar mass vs. size relation. An evolution of the stellar mass vs. size relation might imply that, in spite of the overall early assembly of these sources, their evolution is not complete, and processes like minor (and likely dry) merging might still shape the structural properties of these objects to resemble those of their local counterparts, without substantially affecting their stellar mass or host stellar populations. Nonetheless, a definite conclusion on the actual relevance of size evolution for the studied early-type sample is precluded by possible systematics and biases.
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DOI：
10.1086/591016
发表时间：
2008-06
期刊：
The Astrophysical Journal
影响因子：
--
作者：
N. Menci;P. Rosati;R. Gobat;V. Strazzullo;A. Rettura;S. Mei;R. D. Inaf;Osserv. Astronomico di Roma European Southern Observatory-Osserv.-Astronomico-di-Roma-European-Southern-2291069956;2. Karl-Schwarzschild-Strasse;Garching;Germany National Radio Astronomy Observatory;Socorro;Nm;USA. Department of physics;Astronomy;John s Hopkins University;Baltimore;Md;Usa University of Paris Denis Diderot;Paris Cédex;France Paris;S. Meudon;Meudon Cedex;France
通讯作者：
N. Menci;P. Rosati;R. Gobat;V. Strazzullo;A. Rettura;S. Mei;R. D. Inaf;Osserv. Astronomico di Roma European Southern Observatory-Osserv.-Astronomico-di-Roma-European-Southern-2291069956;2. Karl-Schwarzschild-Strasse;Garching;Germany National Radio Astronomy Observatory;Socorro;Nm;USA. Department of physics;Astronomy;John s Hopkins University;Baltimore;Md;Usa University of Paris Denis Diderot;Paris Cédex;France Paris;S. Meudon;Meudon Cedex;France
DOI：
10.1088/0004-637x/716/2/1503
发表时间：
2010-02
期刊：
The Astrophysical Journal
影响因子：
--
作者：
C. Papovich;I. Momcheva;C. Willmer;K. Finkelstein;S. Finkelstein;K. Tran;M. Brodwin;J. Dunlop
通讯作者：
C. Papovich;I. Momcheva;C. Willmer;K. Finkelstein;S. Finkelstein;K. Tran;M. Brodwin;J. Dunlop
GASPHOT：Galaxy 自动表面测光工具
影响因子：
6.5
作者：
E. Pignatelli;G. Fasano;P. Cassata
通讯作者：
P. Cassata
影响因子：
6.5
作者：
P. Rosati;P. Tozzi;R. Gobat;Joana S. Santos;M. Nonino;R. Demarco;C. Lidman;C. Lidman;C. Mullis;V. Strazzullo;H. Böhringer;R. Fassbender;Kyle S. Dawson;Masayuki Tanaka;J. Jee;H. Ford;G. Lamer;A. Schwope
通讯作者：
P. Rosati;P. Tozzi;R. Gobat;Joana S. Santos;M. Nonino;R. Demarco;C. Lidman;C. Lidman;C. Mullis;V. Strazzullo;H. Böhringer;R. Fassbender;Kyle S. Dawson;Masayuki Tanaka;J. Jee;H. Ford;G. Lamer;A. Schwope
DOI：
10.1088/0004-637x/704/1/672
发表时间：
2009-08
期刊：
The Astrophysical Journal
影响因子：
--
作者：
Myung-Kook Jee;P. Rosati;H. Ford;K. Dawson;C. Lidman;S. Perlmutter;R. Demarco;V. Strazzullo;C. Mullis;H. Böhringer;R. Fassbender
通讯作者：
Myung-Kook Jee;P. Rosati;H. Ford;K. Dawson;C. Lidman;S. Perlmutter;R. Demarco;V. Strazzullo;C. Mullis;H. Böhringer;R. Fassbender