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A high-dimensional look at VIPERS galaxies

Published online by Cambridge University Press:  01 July 2015

Benjamin R. Granett  and
the VIPERS Team
Benjamin R. Granett
Affiliation:
INAF OA Brera, Via E. Bianchi 46, 23807 Merate, Italy email: ben.granett@brera.inaf.it
the VIPERS Team
Affiliation:
The VIPERS Team: U. Abbas, C. Adami, S. Arnouts, J. Bel, M. Bolzonella, D. Bottini, E. Branchini, A. Burden, A. Cappi, J. Coupon, O. Cucciati, I. Davidzon, G. De Lucia, S. de la Torre, C. Di Porto, P. Franzetti, A. Fritz, M. Fumana, B. Garilli, L. Guzzo, P. Hudelot, O. Ilbert, A. Iovino, J. Krywult, V. Le Brun, O. Le Fèvre, D. Maccagni, K. Małek, A. Marchetti, C. Marinoni, F. Marulli, H. J. McCracken, Y. Mellier, L. Moscardini, R. C. Nichol, L. Paioro, J. A. Peacock, W. J. Percival, M. Polletta, A. Pollo, M. Scodeggio, L. A. M. Tasca, R. Tojeiro, D. Vergani, G. Zamorani and A. Zanichelli Web address: http://vipers.inaf.it
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Abstract

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We investigate how galaxies in VIPERS (the VIMOS Public Extragalactic Redshift Survey) inhabit the cosmological density field by examining the correlations across the observable parameter space of galaxy properties and clustering strength. The high-dimensional analysis is made manageable by the use of group-finding and regression tools. We find that the major trends in galaxy properties can be explained by a single parameter related to stellar mass. After subtracting this trend, residual correlations remain between galaxy properties and the local environment pointing to complex formation dependencies. As a specific application of this work we build subsamples of galaxies with specific clustering properties for use in cosmological tests.

Keywords

Galaxy surveysstatistical methodsgalaxy properties
Type
Contributed Papers
Information
Proceedings of the International Astronomical Union , Volume 10 , Symposium S306: Statistical Challenges in 21st Century Cosmology , May 2014 , pp. 369 - 371
Copyright
Copyright © International Astronomical Union 2015 

References

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Marchetti, A., et al. 2013, MNRS, 428, 1424Google Scholar
Marulli, F. E., et al. 2013, A&A, 557, A17Google Scholar
de la Torre, S., et al. 2013, A&A, 557, A54Google Scholar