Parameterisation of galaxy spectra in the 2dF Galaxy Redshift Survey

被引：2

作者：

Madgwick, D ^{[1
]}

Lahav, O ^{[1
]}

Taylor, K ^{[1
]}

机构：

[1] Univ Cambridge, Inst Astron, Cambridge CB3 0HA, England

来源：

MINING THE SKY | 2001年

关键词：

D O I：

10.1007/10849171_39

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The 2dF Galaxy Redshift Survey has already yielded over 130,000 galaxy spectra (out of the planned 250,000). We present a method for the parameterisation of galaxy spectra in the 2dF and other large redshift surveys using a new continuous parameter eta = 0.44pc(1) - pc(2), based on a Principal Components Analysis (where pc(1) and pc(2) are the projections onto the first and second principal components respectively). This parameter is designed to be robust to instrumental uncertainties and it represents the absorption/emission strength of a galaxy.

引用

页码：331 / 336

页数：6

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