A GROUP-GALAXY CROSS-CORRELATION FUNCTION ANALYSIS IN zCOSMOS
A. Iovino
(1)
,
P. Kampczyk
(1)
,
K. Kovac
(1)
,
F. Lamareille
(2)
,
J-F Le Borgne
,
V. Le Brun
(3)
,
C. Maier
(4)
,
M. Mignoli
(5)
,
R. Pelló
(2)
,
Y. Peng
(6)
,
E. Perez Montero
(7)
,
V. Presotto
(8, 9)
,
J. Silverman
(1)
,
M. Tanaka
,
L. Tasca
(3)
,
L. Tresse
(3)
,
D. Vergani
(10)
,
E. Zucca
(11)
,
L. Barnes
,
R. Bordoloi
,
A. Cappi
(12)
,
Alessandro Cimatti
(13)
,
G. Coppa
(1)
,
A. M. Koekemoer
(14)
,
C. Lopez-Sanjuan
(3)
,
H. J. Mccracken
(15)
,
M. Moresco
,
P. Nair
(16)
,
L. Pozzetti
(16)
,
N. Welikala
(3)
,
C. Knobel
(1)
,
S. J. Lilly
(17)
,
C. M. Carollo
(18)
,
T. Contini
(7)
,
J-P Kneib
(3)
,
O. Le Fevre
(3)
,
V. Mainieri
(19)
,
A. Renzini
(20)
,
M. Scodeggio
(21)
,
G. Zamorani
(5)
,
S. Bardelli
(16)
,
M. Bolzonella
(5)
,
A. Bongiorno
(22)
,
K. Caputi
(1)
,
O. Cucciati
(23)
,
S. de La Torre
(3)
,
L. De Ravel
,
P. Franzetti
(1)
,
B. Garilli
(1)
1
AUTRES
2 IRAP - Institut de recherche en astrophysique et planétologie
3 LAM - Laboratoire d'Astrophysique de Marseille
4 LLB - UMR 12 - Laboratoire Léon Brillouin
5 IASF-Bo - Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna
6 HNU - Hunan Normal University
7 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
8 Università degli studi di Trieste = University of Trieste
9 OAT - INAF - Osservatorio Astronomico di Trieste
10 OAA - INAF - Osservatorio Astrofisico di Arcetri
11 OAB - INAF - Osservatorio Astronomico di Brera
12 LAGRANGE - Joseph Louis LAGRANGE
13 Dipartimento di Astronomia
14 STSci - Space Telescope Science Institute
15 IAP - Institut d'Astrophysique de Paris
16 OABO - INAF - Osservatorio Astronomico di Bologna
17 ETH Zürich - Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich]
18 University of Chicago
19 ESO - European Southern Observatory
20 OAPD - INAF - Osservatorio Astronomico di Padova
21 INAF- Milano
22 GATECH - College of Computing
23 Dipartimento di Fisica
2 IRAP - Institut de recherche en astrophysique et planétologie
3 LAM - Laboratoire d'Astrophysique de Marseille
4 LLB - UMR 12 - Laboratoire Léon Brillouin
5 IASF-Bo - Istituto di Astrofisica Spaziale e Fisica cosmica - Bologna
6 HNU - Hunan Normal University
7 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
8 Università degli studi di Trieste = University of Trieste
9 OAT - INAF - Osservatorio Astronomico di Trieste
10 OAA - INAF - Osservatorio Astrofisico di Arcetri
11 OAB - INAF - Osservatorio Astronomico di Brera
12 LAGRANGE - Joseph Louis LAGRANGE
13 Dipartimento di Astronomia
14 STSci - Space Telescope Science Institute
15 IAP - Institut d'Astrophysique de Paris
16 OABO - INAF - Osservatorio Astronomico di Bologna
17 ETH Zürich - Eidgenössische Technische Hochschule - Swiss Federal Institute of Technology [Zürich]
18 University of Chicago
19 ESO - European Southern Observatory
20 OAPD - INAF - Osservatorio Astronomico di Padova
21 INAF- Milano
22 GATECH - College of Computing
23 Dipartimento di Fisica
J-F Le Borgne
- Fonction : Auteur
M. Tanaka
- Fonction : Auteur
L. Tresse
- Fonction : Auteur
- PersonId : 743336
- IdHAL : laurence-tresse
- ORCID : 0000-0001-8776-0958
- IdRef : 088004031
E. Zucca
- Fonction : Auteur
- PersonId : 755651
- ORCID : 0000-0002-5845-8132
L. Barnes
- Fonction : Auteur
R. Bordoloi
- Fonction : Auteur
M. Moresco
- Fonction : Auteur
- PersonId : 761800
- ORCID : 0000-0002-7616-7136
T. Contini
- Fonction : Auteur
- PersonId : 178293
- IdHAL : thierry-contini
- ORCID : 0000-0003-0275-938X
- IdRef : 112340571
O. Le Fevre
- Fonction : Auteur
- PersonId : 17465
- IdHAL : olivier-le-fevre
- ORCID : 0000-0001-5891-2596
- IdRef : 070374678
G. Zamorani
- Fonction : Auteur
- PersonId : 755662
- ORCID : 0000-0002-2318-301X
- IdRef : 190956429
S. Bardelli
- Fonction : Auteur
- PersonId : 755650
- ORCID : 0000-0002-8900-0298
L. De Ravel
- Fonction : Auteur
Résumé
We present a group-galaxy cross-correlation analysis using a group catalog produced from the 16,500 spectra from the optical zCOSMOS galaxy survey. Our aim is to perform a consistency test in the redshift range 0.2 \textless= z \textless= 0.8 between the clustering strength of the groups and mass estimates that are based on the richness of the groups. We measure the linear bias of the groups by means of a group-galaxy cross-correlation analysis and convert it into mass using the bias-mass relation for a given cosmology, checking the systematic errors using realistic group and galaxy mock catalogs. The measured bias for the zCOSMOS groups increases with group richness as expected by the theory of cosmic structure formation and yields masses that are reasonably consistent with the masses estimated from the richness directly, considering the scatter that is obtained from the 24 mock catalogs. Some exceptions are the richest groups at high redshift (estimated to be more massive than 10(13.5) M-circle dot), for which the measured bias is significantly larger than for any of the 24 mock catalogs (corresponding to a 3 sigma effect), which is attributed to the extremely large structure that is present in the COSMOS field at z similar to 0.7. Our results are in general agreement with previous studies that reported unusually strong clustering in the COSMOS field.