不同环境区球体全色探测（SPIDER）-- I. grizYJHK波段的样本和星系参数
Spheroid's Panchromatic Investigation in Different Environmental Regions (SPIDER) - I. Sample and galaxy parameters in the grizYJHK wavebands
摘要：
这是一个系列的第一篇论文介绍了一个球体的全色调查在不同的环境区域（SPIDER）。球状体样本由5，080个明亮的（Mr<-20）早型星系（ETG）组成，红移范围为0.05至0.095，采用SDSS-DR 6的光学（Griz）测光和光谱学以及UKIDSS-LAS（DR 4）的近红外（YJHK）测光。我们描述了如何均匀的光度参数（星系的颜色和结构参数）来自使用grizYJHK波段。我们发现没有系统的CM关系时，探测从g-r到g-K的基线变陡，这意味着内部颜色梯度驱动ETG中的大部分质量-金属丰度关系。就结构参数而言，我们发现ETG的平均有效半径平滑地减小，约30%，从g到K，而没有检测到的轴比，Sersic指数，和a4参数的波段的显着依赖性。此外，速度分散重新测量的所有ETG使用STARLIGHT和SDSS得到的比较。我们将我们的（2DPHOT）总星等，有效半径和平均表面亮度的测量结果与SDSS管道（照片）的一部分进行比较。发现并报告了显著差异，包括与第三个独立部分的比较。在所有波段的样本完整性的充分表征，建立的特征参数的应用范围，这里提出的ETG的全球尺度关系的分析。
英文摘要：
This is the first paper of a series presenting a Spheroid's Panchromatic Investigation in Different Environmental Regions (SPIDER). The sample of spheroids consists of 5,080 bright (Mr<-20) Early-Type galaxies (ETGs), in the redshift range of 0.05 to 0.095, with optical (griz) photometry and spectroscopy from SDSS-DR6 and Near-Infrared (YJHK) photometry from UKIDSS-LAS (DR4). We describe how homogeneous photometric parameters (galaxy colors and structural parameters) are derived using grizYJHK wavebands. We find no systematic steepening of the CM relation when probing the baseline from g-r to g-K, implying that internal color gradients drive most of the mass-metallicity relation in ETGs. As far as structural parameters are concerned we find that the mean effective radius of ETGs smoothly decreases, by ~30%, from g through K, while no significant dependence on waveband is detected for the axis ratio, Sersic index, and a4 parameters. Also, velocity dispersions are re-measured for all the ETGs using STARLIGHT and compared to those obtained by SDSS. We compare our (2DPHOT) measurements of total magnitude, effective radius, and mean surface brightness with those obtained as part of the SDSS pipeline (Photo). Significant differences are found and reported, including comparisons with a third and independent part. A full characterization of the sample completeness in all wavebands is presented, establishing the limits of application of the characteristic parameters presented here for the analysis of the global scaling relations of ETGs.
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