The zCOSMOS Survey. The dependence of clustering on luminosity and stellar mass at z=0.2-1
B. Meneux
(1, 2, 3)
,
L. Guzzo
(4)
,
S. de La Torre
(5)
,
C. Porciani
(6)
,
G. Zamorani
(1)
,
U. Abbas
(6)
,
M. Bolzonella
(1)
,
B. Garilli
(7)
,
A. Iovino
(4)
,
L. Pozzetti
(1)
,
E. Zucca
(1)
,
S. Lilly
(6)
,
O. Le Fevre
(5)
,
J. -P. Kneib
(5)
,
C. M. Carollo
(8)
,
T. Contini
(9)
,
V. Mainieri
(6)
,
A. Renzini
(6)
,
M. Scodeggio
(7)
,
S. Bardelli
(1)
,
A. Bongiorno
(1)
,
K. Caputi
(6)
,
G. Coppa
(6)
,
O. Cucciati
(7)
,
L. de Ravel
(6)
,
P. Franzetti
(7)
,
P. Kampczyk
(6)
,
C. Knobel
(6)
,
K. Kovac
(6)
,
F. Lamareille
(1)
,
J. -F. Le Borgne
(10)
,
V. Le Brun
(5)
,
C. Maier
(6)
,
R. Pello
(9)
,
Y. Peng
(11)
,
E. Perez Montero
(9)
,
E. Ricciardelli
(6)
,
J. D. Silverman
(12)
,
M. Tanaka
(13)
,
L. Tasca
(5)
,
L. Tresse
(5)
,
D. Vergani
(6)
,
D. Bottini
(7)
,
A. Cappi
(1)
,
Alessandro Cimatti
(6)
,
P. Cassata
(6)
,
M. Fumana
(6)
,
A. M. Koekemoer
(14)
,
A. Leauthaud
(9)
,
D. Maccagni
(7)
,
Christian Marinoni
(15, 16)
,
H. J. Mccracken
(17)
,
P. Memeo
(1)
,
P. Oesch
(6)
,
R. Scaramella
(18)
1
OABO -
INAF - Osservatorio Astronomico di Bologna
2 MPE - Max-Planck-Institut für Extraterrestrische Physik
3 Universitats-Sternwarte [München]
4 OAB - INAF - Osservatorio Astronomico di Brera
5 LAM - Laboratoire d'Astrophysique de Marseille
6 AUTRES
7 INAF- Milano
8 University of Chicago
9 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
10 LATT - Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées
11 Institute of Astronomy [ETH Zürich]
12 Human Genetics Center
13 School of Biotechnology and Biomolecular Sciences
14 STSci - Space Telescope Science Institute
15 CPT - Centre de Physique Théorique - UMR 6207
16 CPT - Centre de Physique Théorique - UMR 7332
17 IAP - Institut d'Astrophysique de Paris
18 IASF-Bo - Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna
2 MPE - Max-Planck-Institut für Extraterrestrische Physik
3 Universitats-Sternwarte [München]
4 OAB - INAF - Osservatorio Astronomico di Brera
5 LAM - Laboratoire d'Astrophysique de Marseille
6 AUTRES
7 INAF- Milano
8 University of Chicago
9 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
10 LATT - Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées
11 Institute of Astronomy [ETH Zürich]
12 Human Genetics Center
13 School of Biotechnology and Biomolecular Sciences
14 STSci - Space Telescope Science Institute
15 CPT - Centre de Physique Théorique - UMR 6207
16 CPT - Centre de Physique Théorique - UMR 7332
17 IAP - Institut d'Astrophysique de Paris
18 IASF-Bo - Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna
S. de La Torre
- Fonction : Auteur
- PersonId : 21320
- IdHAL : sylvain-de-la-torre
- IdRef : 133617238
G. Zamorani
- Fonction : Auteur
- PersonId : 755662
- ORCID : 0000-0002-2318-301X
- IdRef : 190956429
B. Garilli
- Fonction : Auteur
- PersonId : 755663
- ORCID : 0000-0001-7455-8750
- IdRef : 170321126
E. Zucca
- Fonction : Auteur
- PersonId : 755651
- ORCID : 0000-0002-5845-8132
O. Le Fevre
- Fonction : Auteur
- PersonId : 17465
- IdHAL : olivier-le-fevre
- ORCID : 0000-0001-5891-2596
- IdRef : 070374678
T. Contini
- Fonction : Auteur
- PersonId : 178293
- IdHAL : thierry-contini
- ORCID : 0000-0003-0275-938X
- IdRef : 112340571
S. Bardelli
- Fonction : Auteur
- PersonId : 755650
- ORCID : 0000-0002-8900-0298
L. Tresse
- Fonction : Auteur
- PersonId : 743336
- IdHAL : laurence-tresse
- ORCID : 0000-0001-8776-0958
- IdRef : 088004031
Christian Marinoni
- Fonction : Auteur
- PersonId : 7013
- IdHAL : christian-marinoni
- IdRef : 157113582
Résumé
We study the dependence of galaxy clustering on luminosity and stellar mass at redshifts z ~ [0.2-1] using the first zCOSMOS 10K sample. We measure the redshift-space correlation functions xi(rp,pi) and its projection wp(rp) for sub-samples covering different luminosity, mass and redshift ranges. We quantify in detail the observational selection biases and we check our covariance and error estimate techniques using ensembles of semi-analytic mock catalogues. We finally compare our measurements to the cosmological model predictions from the mock surveys. At odds with other measurements, we find a weak dependence of galaxy clustering on luminosity in all redshift bins explored. A mild dependence on stellar mass is instead observed. At z~0.7, wp(rp) shows strong excess power on large scales. We interpret this as produced by large-scale structure dominating the survey volume and extending preferentially in direction perpendicular to the line-of-sight. We do not see any significant evolution with redshift of the amplitude of clustering for bright and/or massive galaxies. The clustering measured in the zCOSMOS data at 0.5=10 is only marginally consistent with predictions from the mock surveys. On scales larger than ~2 h^-1 Mpc, the observed clustering amplitude is compatible only with ~1% of the mocks. Thus, if the power spectrum of matter is LCDM with standard normalization and the bias has no unnatural scale-dependence, this result indicates that COSMOS has picked up a particularly rare, ~2-3 sigma positive fluctuation in a volume of ~10^6 h^-1 Mpc^3. These findings underline the need for larger surveys of the z~1 Universe to appropriately characterize the level of structure at this epoch.