The ugrizYJHK luminosity distributions and densities from the combined MGC, SDSS and UKIDSS LAS data sets
The ugrizYJHK luminosity distributions and densities from the combined MGC, SDSS and UKIDSS LAS data sets
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来自组合 MGC、SDSS 和 UKIDSS LAS 数据集的 ugrizYJHK 光度分布和密度
DOI：
10.1111/j.1365-2966.2010.16374.x
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发表时间：
2010
影响因子：
4.8
通讯作者：
A. Robotham
中科院分区：
文献类型：
--
作者：
D. Hill;S. Driver;E. Cameron;N. Cross;J. Liske;A. Robotham
我们结合了来自千年星系表、斯隆数字巡天和UKIRT红外深空大区域巡天的联合收割机数据，从一个普通的低红移体积（z < 0.1，L* 系统为71000 h−31 Mpc 3）中产生了ugrizYJHK光度函数和密度，光谱完整性为100%。在光学方面，拟合的Schechter函数在形状上与先前报道的值相当，但具有更高的归一化（通常u，g，r，i，z的φ* 值分别比SDSS团队报道的高0%，30%，20%，15%，5%）。我们将这些归因于探测的红移范围的差异，不完整性和采用的归一化方法。在近红外（NIR），我们发现显着不同的Schechter函数参数（主要是在M* 值），以前的报告和属性，这是改善成像数据的质量比以前的研究。这是第一次对河外光度密度进行均匀测量，它对光学和近红外区域进行了全面采样。不像以前的汇编，已经注意到光学和近红外制度之间的不连续性，我们的均匀数据集显示了一个平滑的宇宙光谱能量分布（CSED）。修正后的尘埃衰减，我们比较我们的CSED的预期值的基础上最近的约束宇宙星星形成的历史和初始质量函数。
We combine data from the Millennium Galaxy Catalogue, Sloan Digital Sky Survey and UKIRT Infrared Deep Sky Survey Large Area Survey to produce ugrizYJHK luminosity functions and densities from within a common, low-redshift volume (z < 0.1, ∼ 71 000 h−31 Mpc3 for L* systems) with 100 per cent spectroscopic completeness. In the optical the fitted Schechter functions are comparable in shape to those previously reported values but with higher normalizations (typically 0, 30, 20, 15, 5 per cent higher φ* values in u, g, r, i, z, respectively, over those reported by the SDSS team). We attribute these to differences in the redshift ranges probed, incompleteness and adopted normalization methods. In the near-IR (NIR) we find significantly different Schechter function parameters (mainly in the M* values) to those previously reported and attribute this to the improvement in the quality of the imaging data over previous studies. This is the first homogeneous measurement of the extragalactic luminosity density which fully samples both the optical and NIR regimes. Unlike previous compilations that have noted a discontinuity between the optical and NIR regimes our homogeneous data set shows a smooth cosmic spectral energy distribution (CSED). After correcting for dust attenuation we compare our CSED to the expected values based on recent constraints on the cosmic star formation history and the initial mass function.