Multiwavelength observations of a rich galaxy cluster at z ~ 1 - the HST/ACS colour–magnitude diagram
Multiwavelength observations of a rich galaxy cluster at z ~ 1 - the HST/ACS colour–magnitude diagram
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z ~ 1 处丰富星系团的多波长观测 - HST/ACS 色度图
DOI：
10.1051/0004-6361/200811546
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发表时间：
2009
影响因子：
6.5
通讯作者：
Schwope
中科院分区：
文献类型：
--
作者：
Santos;Rosati;Lidman;Dawson;Perlmutter;Böhringer;Balestra;Mullis;Fassbender;Kohnert;Rettura;Schwope
XMMU J1229+0151是一个红移的丰富星系团，在XMM-牛顿遥远星系团计划的范围内偶然发现了X射线。利用NTT/SOFI对HST/ACS的i775和z 850通带和VLT/FORS 2光谱进行了观测，并对观测结果进行了后续的J和KS波段近红外（NIR）成像。星系形态进行了检查目视和Sersic配置文件拟合的21光谱确认的集群成员在ACS的视野。用Sersic模型拟合星系的表面亮度，得到星系的星等，然后用这种方法导出了色-星等关系。用Bruzual和Charlot的模型拟合观测到的光谱能量分布（SED），得到了星系团的恒星质量和形成年龄。结果通过模型拟合得到的结构Sersic指数与已确认成员的视觉形态分类一致，表明椭圆星系占明显优势（15/21）。光谱成员的色-星等关系显示出一个非常紧密的红序，零点为0.86±0.04等，内禀散射为0.039等。用星系模型得到的CMR具有相似的参数。通过拟合光谱和SED的早期型人口，我们得到一个恒星形成加权年龄为4.3 Gyr的中值星系恒星质量为7.4。我们发现了三个类似于850等的明亮星系，而不是明确地确定一个最亮的星系团星系（BCG），它们是最大质量的星系团成员，质量约为2。我们的研究结果加强了目前的证据，缺乏显着的演变，在分散和斜率的红色序列到z1。
ContextXMMU J1229+0151 is a rich galaxy cluster with redshiftthat was serendipitously detected in X-rays within the scope of the XMM-Newton Distant Cluster Project. Both HST/ACS observations in thei775andz850passbands and VLT/FORS2 spectroscopy were obtained, in addition to follow-up Near-Infrared (NIR) imaging in theJ- andKs-bands with NTT/SOFI.AimsWe investigate the photometric, structural, and spectral properties of the early-type galaxies in the high-redshift cluster XMMU J1229+0151.MethodsSource detection and aperture photometry are performed in the optical and NIR imaging. Galaxy morphology is inspected visually and by means of Sersic profile fitting to the 21 spectroscopically confirmed cluster members in the ACS field of view. Thecolour-magnitude relation (CMR) is derived with a method based on galaxy magnitudes obtained by fitting the surface brightness of the galaxies with Sersic models. Stellar masses and formation ages of the cluster galaxies are derived by fitting the observed spectral energy distributions (SED) with models developed by Bruzual & Charlot. Star-formation histories of the early-type galaxies are constrained by analysing the stacked spectrophotometric data.ResultsThe structural Sersic indexnobtained by model fitting agrees with the visual morphological classification of the confirmed members, indicating a clear predominance of elliptical galaxies (15/21). Thecolour-magnitude relation of the spectroscopic members shows a very tight red-sequence with a zero point of 0.86±0.04 mag, and intrinsic scatter equal to 0.039 mag. The CMR obtained with the galaxy models has similar parameters. By fitting both the spectra and SED of the early-type population, we obtain a star-formation-weighted age of 4.3 Gyr for a median galaxy stellar-mass of 7.4. Instead of identifying a brightest cluster galaxy (BCG) unambiguously, we find three bright galaxies with a similarz850magnitude, which are, in addition, the most massive cluster members, with ~2. Our results strengthen the current evidence of a lack of significant evolution in both the scatter and slope of the red-sequence out toz1.
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早期型星系团的演化 z ≃1 处的尺寸与表面亮度关系
DOI：
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发表时间：
2005
期刊：
影响因子：
--
作者：
B. Holden;J. Blakeslee;M. Postman;G. Illingworth;R. Demarco;M. Pranx;P. Rosati;R. Bouwens;A. R. Martel;H. Ford;M. Clampin;G. Hartig;Narciso Benitez;N. Cross;N. Homeier;C. Lidman;F. Menanteau;A. Zirm;D. R. Ardila;F. Bartko;L. Bradley;T. Broadhurst;Robert A. Brown;C. Burrows;E. Cheng;Paul D. Feldman;D. Golimowski;Tomotsugu Goto;C. Gronwall;L. Infante;R. Kimble;J. Krist;Michael P. Lesser;D. Magee;S. Mei;G. Meurer;G. Miley;V. Motta;M. Sirianni;W. Sparks;Hien D. Tran;Z. Tsvetanov;R. White;W. Zheng
通讯作者：
W. Zheng
DOI：
10.1111/j.1365-2966.2006.09994.x
发表时间：
2006-02
影响因子：
4.8
作者：
D. Croton;G. Kauffmann;V. Springel;S. White;G. Lucia;A. Jenkins;J. Navarro;C. Frenk;Liang Gao-Lian
通讯作者：
D. Croton;G. Kauffmann;V. Springel;S. White;G. Lucia;A. Jenkins;J. Navarro;C. Frenk;Liang Gao-Lian
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
XMM 聚类调查：XMMXCS J2215.9–1738 在 z = 1.457 处的动态状态
DOI：
--
发表时间：
2007
期刊：
影响因子：
--
作者：
M. Hilton;C. Collins;S. Stanford;C. Lidman;K. Dawson;M. Davidson;S. Kay;A. Liddle;R. Mann;C. Miller;R. Nichol;A. Romer;K. Sabirli;P. T. P. Viana;M. West
通讯作者：
M. West
对 RX J0152.7-1357（z = 0.837 处正在形成的星系团）进行的 VLT 光谱巡天
DOI：
--
发表时间：
2004
期刊：
影响因子：
--
作者：
R. Demarco;R. Demarco;P. Rosati;C. Lidman;N. Homeier;Evan Scannapieco;Narciso Benitez;V. Mainieri;M. Nonino;M. Girardi;S. Stanford;S. Stanford;P. Tozzi;S. Borgani;J. Silk;G. Squires;T. Broadhurst
通讯作者：
T. Broadhurst