The VIMOS-VLT Deep Survey. The dependence of clustering on galaxy stellar mass at z~1

B. Meneux (1) , L. Guzzo (2) , B. Garilli (3, 4, 5, 6) , O. Le Fevre (1) , A. Pollo (1, 4, 5, 6) , J. Blaizot (7, 8, 9) , M. Bolzonella (10) , F. Lamareille (11, 12) , L. Pozzetti (4, 5, 6) , A. Cappi (2, 5, 6) , A. Iovino (4, 5, 6) , Christian Marinoni (1, 13, 14) , H. J. Mccracken (8) , S. de La Torre , D. Bottini (3, 4, 5, 6) , V. Le Brun (1) , D. Maccagni (3, 4, 5, 6) , J. P. Picat (11, 15) , R. Scaramella (4, 5, 6, 16) , M. Scodeggio (3, 4, 5, 6) , L. Tresse (1) , G. Vettolani (2) , A. Zanichelli (4, 5, 6, 17) , U. Abbas , C. Adami (1) , S. Arnouts (1) , S. Bardelli (5, 6) , A. Bongiorno (10) , S. Charlot (8, 18) , P. Ciliegi (4, 5, 6) , T. Contini (11) , O. Cucciati (4, 19) , Sylvie Foucaud (1, 3, 4, 5, 6) , P. Franzetti (3, 4, 5, 6) , I. Gavignaud (11, 15, 20) , O. Ilbert (1, 21, 22) , B. Marano , A. Mazure (1) , R. Merighi (4, 5, 6) , S. Paltani (1) , R. Pello (11, 15) , M. Radovich (5, 6) , D. Vergani (23) , G. Zamorani (4, 5, 6) , E. Zucca (4, 5, 6)

1 LAM - Laboratoire d'Astrophysique de Marseille
2 IASF-Bo - Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna
3 IASF-MI - Istituto di Astrofisica Spaziale e Fisica Cosmica - Milano
4 OAB - INAF - Osservatorio Astronomico di Brera
5 OABO - INAF - Osservatorio Astronomico di Bologna
6 OAC - INAF - Osservatorio Astronomico di Capodimonte
7 SPhT - Service de Physique Théorique
8 IAP - Institut d'Astrophysique de Paris
9 University of Oxford
10 UNIBO - Alma Mater Studiorum Università di Bologna = University of Bologna
11 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
12 OP - Observatoire de Paris - Site de Paris
13 CPT - Centre de Physique Théorique - UMR 6207
14 CPT - Centre de Physique Théorique - UMR 7332
15 UMS 831 - Services communs OMP
16 OAR - INAF - Osservatorio Astronomico di Roma
17 IRA - Istituto di Radioastronomia [Bologna]
18 MPA - Max-Planck-Institut für Astrophysik
19 Dipartimento di Fisica
20 ESO - European Southern Observatory
21 OAB - INAF - Osservatorio Astronomico di Bologna
22 Institut d'Astrophysique et de Géophysique [Liège]
23 Institute of Liver Studies

Aims: We use the VVDS-Deep first-epoch data to measure the dependence of galaxy clustering on galaxy stellar mass, at z~0.85. Methods: We measure the projected correlation function wp(rp) for sub-samples with 0.510^9 Msun to r0 ~ 4.28 h^-1 Mpc for galaxies more massive than 10^10.5 Msun. At the same time, the slope increases from ~ 1.67 to ~ 2.28. A comparison of the observed wp(rp) to local measurements by the SDSS shows that the evolution is faster for objects less massive than ~10^10.5 Msun. This is interpreted as a higher dependence on redshift of the linear bias b_L for the more massive objects. While for the most massive galaxies b_L decreases from 1.5+/-0.2 at z~0.85 to 1.33+/-0.03 at z~0.15, the less massive population maintains a virtually constant value b_L~1.3. This result is in agreement with a scenario in which more massive galaxies formed at high redshift in the highest peaks of the density field, while less massive objects form at later epochs from the more general population of dark-matter halos.

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

B. Meneux, L. Guzzo, B. Garilli, O. Le Fevre, A. Pollo, et al.. The VIMOS-VLT Deep Survey. The dependence of clustering on galaxy stellar mass at z~1. Astronomy and Astrophysics - A&A, 2008, 478299, pp.310. ⟨hal-00176070⟩