The VIMOS Public Extragalactic Redshift Survey (VIPERS) : spectral classification through principal component analysis

doi:10.1093/mnras/sts132

The VIMOS Public Extragalactic Redshift Survey (VIPERS) : spectral classification through principal component analysis

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The VIMOS Public Extragalactic Redshift Survey (VIPERS) : spectral classification through principal component analysis

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punktacja MEiN [2013 A]: 35

title:	The VIMOS Public Extragalactic Redshift Survey (VIPERS) : spectral classification through principal component analysis
author:	Marchetti A., Granett B. R., Guzzo L., Fritz A., Garilli B., Scodeggio M., Abbas U., Adami C., Arnouts S., Bolzonella M., Bottini D., Cappi A., Coupon J., Cucciati O., Lucia G. De, de la Torre S., Franzetti P., Fumana M., Ilbert O., Iovino A., Krywult J., Brun V. Le, Fevre O. Le, Maccagni D., Malek K., Marulli F., McCracken H. J., Meneux B., Paioro L., Polletta M., Pollo Agnieszka , Schlagenhaufer H., Tasca L., Tojeiro R., Vergani D., Zanichelli A., Bel J., Bersanelli M., Blaizot J., Branchini E., Burden A., Davidzon I., Porto C. Di, Guennou L., Marinoni C., Mellier Y., Moscardini L., Nichol R. C., Peacock J. A., Percival W. J., Phleps S., Schimd C., Wolk M., Zamorani G.
journal title:	Monthly Notices of the Royal Astronomical Society
volume:	428
issue:	2
date of publication :	2013
pages:	1424-1437
ISSN:	0035-8711
eISSN:	1365-2966
DOI:	10.1093/mnras/sts132
language:	English
journal language:	English
abstract in English:	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.
keywords in English:	galaxies: fundamental parameters, galaxies: general, methods: data analysis, techniques: spectroscopic
type:	journal article
subtype:	academic paper

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