The VIMOS Public Extragalactic Redshift Survey (VIPERS). Hierarchical scaling and biasing

A. Cappi (1) , F. Marulli , Julien Bel (2, 3) , O. Cucciati (4) , E. Branchini , S. de La Torre , L. Moscardini , M. Bolzonella , L. Guzzo , U. Abbas (5) , C. Adami , S. Arnouts (6) , D. Bottini (5) , J. Coupon , I. Davidzon , G. de Lucia , A. Fritz , P. Franzetti , M. Fumana (5) , B. Garilli , B. R. Granett , O. Ilbert , A. Iovino (5) , J. Krywult , V. Le Brun (7) , O. Le Fèvre (8) , D. Maccagni (5) , K. Małek , H. J. Mccracken , L. Paioro , M. Polletta (5) , A. Pollo (8) , M. Scodeggio , L. A. . M. Tasca (8) , R. Tojeiro , D. Vergani , A. Zanichelli , A. Burden , C. Di Porto , A. Marchetti (9) , Christian Marinoni (3, 2) , Y. Mellier , R. C. Nichol , J. A. Peacock (10) , W. J. Percival , S. Phleps , C. Schimd (8) , H. Schlagenhaufer , M. Wolk , G. Zamorani (11)

1 LAGRANGE - Joseph Louis LAGRANGE
2 CPT - E3 Cosmologie
3 CPT - Centre de Physique Théorique - UMR 7332
4 OABO - INAF - Osservatorio Astronomico di Bologna
5 AUTRES
6 CFHT - Canada-France-Hawaii Telescope Corporation
7 Département de Radiologie [CHU de Rennes]
8 LAM - Laboratoire d'Astrophysique de Marseille
9 Department of Cellular Biotechnologies and Haematology
10 University of Leeds
11 INAF - Istituto Nazionale di Astrofisica

We investigate the higher-order correlation properties of the VIMOS Public Extragalactic Redshift Survey (VIPERS) to test the hierarchical scaling hypothesis at z~1 and the dependence on galaxy luminosity, stellar mass, and redshift. We also aim to assess deviations from the linearity of galaxy bias independently from a previously performed analysis of our survey (Di Porto et al. 2014). We have measured the count probability distribution function in cells of radii 3 < R < 10 Mpc/h, deriving $\sigma_{8g}$, the volume-averaged two-,three-,and four-point correlation functions and the normalized skewness $S_{3g}$ and kurtosis $S_{4g}$ for volume-limited subsamples covering the ranges $-19.5 \le M_B(z=1.1)-5log(h) \le -21.0$, $9.0 < log(M*/M_{\odot} h^{-2}) \le 11.0$, $0.5 \le z < 1.1$. We have thus performed the first measurement of high-order correlations at z~1 in a spectroscopic redshift survey. Our main results are the following. 1) The hierarchical scaling holds throughout the whole range of scale and z. 2) We do not find a significant dependence of $S_{3g}$ on luminosity (below z=0.9 $S_{3g}$ decreases with luminosity but only at 1{\sigma}-level). 3) We do not detect a significant dependence of $S_{3g}$ and $S_{4g}$ on scale, except beyond z~0.9, where the dependence can be explained as a consequence of sample variance. 4) We do not detect an evolution of $S_{3g}$ and $S_{4g}$ with z. 5) The linear bias factor $b=\sigma_{8g}/\sigma_{8m}$ increases with z, in agreement with previous results. 6) We quantify deviations from the linear bias by means of the Taylor expansion parameter $b_2$. Our results are compatible with a null non-linear bias term, but taking into account other available data we argue that there is evidence for a small non-linear bias term.

Domaines: Cosmologie et astrophysique extra-galactique [astro-ph.CO]

A. Cappi, F. Marulli, Julien Bel, O. Cucciati, E. Branchini, et al.. The VIMOS Public Extragalactic Redshift Survey (VIPERS). Hierarchical scaling and biasing. Astronomy and Astrophysics - A&A, 2015, 579, pp.A70. ⟨10.1051/0004-6361/201525727⟩. ⟨hal-01260950⟩