Journal
MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
Volume 428, Issue 2, Pages 1424-1437Publisher
OXFORD UNIV PRESS
DOI: 10.1093/mnras/sts132
Keywords
methods: data analysis; techniques: spectroscopic; galaxies: fundamental parameters; galaxies: general
Categories
Funding
- PRIN INAF
- Polish Ministry of Science [N N203 512938]
- POLSIH-SWISS ASTRO PROJECT
- Switzerland through the Swiss Contribution
- Japan Society for the Promotion of Science (JSPS) Postdoctoral Fellowship for Foreign Researchers [P11802]
- European Research Council [202781]
- STFC [ST/J500665/1, ST/I001204/1, ST/J001422/1] Funding Source: UKRI
- Science and Technology Facilities Council [ST/J001422/1, ST/I001204/1, ST/J500665/1] Funding Source: researchfish
- Grants-in-Aid for Scientific Research [11F01802] Funding Source: KAKEN
Ask authors/readers for more resources
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.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available