The VIMOS Public Extragalactic Rsdshift Survey (VIPERS) : spectral classification through principal component analysis
The VIMOS Public Extragalactic Rsdshift Survey (VIPERS) : spectral classification through principal component analysis
复制标题
VIMOS 公共河外 Rsdshift 巡天 (VIPERS)：通过主成分分析进行光谱分类
DOI：
10.1093/mnras/sts132
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发表时间：
2013
影响因子：
4.8
通讯作者：
A.
中科院分区：
文献类型：
--
作者：
Marchetti;A.
本文对VIMOS公共河外红移巡天（VIPERS）收集的0.4 <z< 1.0范围内的27350个星系光谱进行了主成分分析。我们采用迭代算法同时修复受噪声和/或天空残差影响的部分光谱，并重建因休息帧变换而产生的间隙，获得了一组跨越星系类型多样性的正交光谱模板。通过选取三个最重要的分量，我们发现我们可以描述整个样本而不受噪声的污染。我们制作了一个特征系数和模板谱的目录，这将是未来VIPERS数据发布的一部分。我们的模板有效地将光谱信息浓缩为两个系数，这两个系数可以与星系的年龄和恒星形成速率相关。我们检查了这个空间的分光光度类型，并确定了早期、中期、晚期和星暴星系。
We develop a Principal Component Analysis aimed at classifying a subset of 27 350 spectra of galaxies in the range 0.4 <z< 1.0 collected by the VIMOS Public Extragalactic Redshift Survey (VIPERS). We apply an iterative algorithm to simultaneously repair parts of spectra affected by noise and/or sky residuals, and reconstruct gaps due to rest-frame transformation, and obtain a set of orthogonal spectral templates that span the diversity of galaxy types. By taking the three most significant components, we find that we can describe the whole sample without contamination from noise. We produce a catalogue of eigencoefficients and template spectra that will be part of future VIPERS data releases. Our templates effectively condense the spectral information into two coefficients that can be related to the age and star formation rate of the galaxies. We examine the spectrophotometric types in this space and identify early, intermediate, late and starburst galaxies.