The Next Generation Virgo Cluster Survey (NGVS). XXVI. The Issues of Photometric Age and Metallicity Estimates for Globular Clusters
The Next Generation Virgo Cluster Survey (NGVS). XXVI. The Issues of Photometric Age and Metallicity Estimates for Globular Clusters
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下一代处女座集群调查（NGVS）。
DOI：
10.3847/1538-4357/aa77b1
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发表时间：
2017-06
影响因子：
4.9
通讯作者：
Guhathakur
中科院分区：
文献类型：
--
作者：
Powalka Mathieu;Lancon Ariane;Puzia Thomas H.;Peng Eric W.;Liu Chengze;Munoz Roberto P.;Blakeslee John P.;Cote Patrick;Ferrarese Laura;Roediger Joel;Sanchez-Janssen Ruben;Zhang Hongxin;Durrell Patrick R.;Cuill;re Jean-Charles;Duc Pierre-Alain;Guhathakur
具有精确多波长光度测量的球状星系团(GC)的大样本正变得越来越容易获得，并可用于限制星系的形成历史。我们给出了基于5种光学-近红外颜色和10个合成恒星布居模型的银河系和处女座核心星云的分析结果。对于MW GC，模型倾向于在光度年龄和金属丰度上达成一致，其值与以前的研究获得的值相似。当与处女座核心GC一起使用时，相同的型号通常会返回更年轻的年龄，因为处女座核心GC的光度由下一代处女座集群调查(NGV)提供。这是在处女座核心GC占据的轨迹和全色颜色空间中的模型之间观察到的系统差异的结果。只有对我们可用的可调参数进行极端微调，才能让大多数最适合的年龄变老。虽然我们不能排除处女座核心的形成历史可能导致相对年轻的GC比在其他环境中更明显的群体，但我们强调，处女座GC的内在属性可能与模型中假设的系统地不同。因此，现代GC样品的大波长覆盖和光度学质量，例如这里使用的那些，本身不足以更好地约束GC形成历史。为了改善这种情况，需要在多维颜色空间中匹配GC的环境相关特性的模型。
Large samples of globular clusters (GC) with precise multi-wavelength photometry are becoming increasingly available and can be used to constrain the formation history of galaxies. We present the results of an analysis of Milky Way (MW) and Virgo core GCs based on 5 optical-near-infrared colors and 10 synthetic stellar population models. For the MW GCs, the models tend to agree on photometric ages and metallicities, with values similar to those obtained with previous studies. When used with Virgo core GCs, for which photometry is provided by the Next Generation Virgo cluster Survey (NGVS), the same models generically return younger ages. This is a consequence of the systematic differences observed between the locus occupied by Virgo core GCs and models in panchromatic color space. Only extreme fine-tuning of the adjustable parameters available to us can make the majority of the best-fit ages old. Although we cannot exclude that the formation history of the Virgo core may lead to more conspicuous populations of relatively young GCs than in other environments, we emphasize that the intrinsic properties of the Virgo GCs are likely to differ systematically from those assumed in the models. Thus, the large wavelength coverage and photometric quality of modern GC samples, such as those used here, is not by itself sufficient to better constrain the GC formation histories. Models matching the environment-dependent characteristics of GCs in multi-dimensional color space are needed to improve the situation.
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DOI：
10.1088/0004-637x/760/2/104
发表时间：
2012-09
期刊：
The Astrophysical Journal
影响因子：
--
作者：
L. Beerman;L. Johnson;M. Fouesneau;J. Dalcanton;D. Weisz;A. Seth;B. Williams;E. Bell;L. Bianchi;N. Caldwell;A. Dolphin;D. Gouliermis;J. Kalirai;S. Larsen;J. Melbourne;H. Rix;E. Skillman
通讯作者：
L. Beerman;L. Johnson;M. Fouesneau;J. Dalcanton;D. Weisz;A. Seth;B. Williams;E. Bell;L. Bianchi;N. Caldwell;A. Dolphin;D. Gouliermis;J. Kalirai;S. Larsen;J. Melbourne;H. Rix;E. Skillman
影响因子：
6.5
作者：
T. Puzia;K. Perrett;T. Bridges
通讯作者：
T. Puzia;K. Perrett;T. Bridges
影响因子：
4.8
作者：
S. Cassisi;S. Degl'innocenti;M. Salaris
通讯作者：
S. Cassisi;S. Degl'innocenti;M. Salaris
DOI：
10.1111/j.1365-2966.2007.12040.x
发表时间：
2006-04
影响因子：
4.8
作者：
A. Lawrence;S. Warren;O. Almaini;A. Edge;N. Hambly;R. Jameson;P. Lucas;M. Casali;A. Adamson
通讯作者：
A. Lawrence;S. Warren;O. Almaini;A. Edge;N. Hambly;R. Jameson;P. Lucas;M. Casali;A. Adamson
下一代处女座星团红外探测 (NGVS-IR)。
DOI：
10.1088/0067-0049/210/1/4
发表时间：
2013-11
期刊：
Astrophysical Journal, The - Supplement Series
影响因子：
--
作者：
Taylor, Matthew A.;Tonry, John L.;Tully, R. Brent;Zhang, Hongxin
通讯作者：
Zhang, Hongxin