The VIMOS-VLT Deep Survey: Luminosity dependence of clustering at z~1
A. Pollo
(1, 2, 3)
,
L. Guzzo
(2)
,
O. Le Fèvre
(1)
,
B. Meneux
(1)
,
A. Cappi
(4)
,
P. Franzetti
(5)
,
A. Iovino
(2)
,
H. Mccracken
(6)
,
C. Marinoni
(7, 1)
,
G. Zamorani
(4)
,
D. Bottini
(5)
,
B. Garilli
(5)
,
V. Le Brun
(1)
,
D. Maccagni
(5)
,
J. Picat
(8)
,
R. Scaramella
(9)
,
M. Scodeggio
(5)
,
L. Tresse
(1)
,
G. Vettolani
(10)
,
A. Zanichelli
(10)
,
C. Adami
(1)
,
S. Arnouts
(1)
,
S. Bardelli
(4)
,
M. Bolzonella
,
S. Charlot
(6)
,
P. Ciliegi
(4)
,
T. Contini
(8)
,
S. Foucaud
(11)
,
I. Gavignaud
(8)
,
O. Ilbert
,
B. Marano
,
A. Mazure
(1)
,
R. Merighi
(4)
,
S. Paltani
(12, 13)
,
R. Pellò
(8)
,
L. Pozzetti
(4)
,
M. Radovich
(14)
,
E. Zucca
(4)
,
M. Bondi
(10)
,
A. Bongiorno
,
G. Busarello
(14)
,
O. Cucciati
(2, 15)
,
L. Gregorini
(10)
,
F. Lamareille
(8)
,
G. Mathez
(8)
,
Y. Mellier
(6)
,
P. Merluzzi
(14)
,
V. Ripepi
(14)
,
D. Rizzo
(16)
1
LAM -
Laboratoire d'Astrophysique de Marseille
2 OAB - INAF - Osservatorio Astronomico di Brera
3 Astronomical Observatory, Jagiellonian University
4 OABO - INAF - Osservatorio Astronomico di Bologna
5 INAF - IASF Milano (Italy)
6 IAP - Institut d'Astrophysique de Paris
7 CPT - Centre de Physique Théorique - UMR 7332
8 LATT - Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées
9 OAR - INAF - Osservatorio Astronomico di Roma
10 IRA-INAF, Bologna
11 UON - University of Nottingham, UK
12 INTEGRAL Science Data Centre
13 Geneva Observatory
14 OAC - INAF - Osservatorio Astronomico di Capodimonte
15 Dipartimento di Fisica dell'Università di Milano-Bicocca
16 Imperial College London
2 OAB - INAF - Osservatorio Astronomico di Brera
3 Astronomical Observatory, Jagiellonian University
4 OABO - INAF - Osservatorio Astronomico di Bologna
5 INAF - IASF Milano (Italy)
6 IAP - Institut d'Astrophysique de Paris
7 CPT - Centre de Physique Théorique - UMR 7332
8 LATT - Laboratoire d'Astrophysique de l'Observatoire Midi-Pyrénées
9 OAR - INAF - Osservatorio Astronomico di Roma
10 IRA-INAF, Bologna
11 UON - University of Nottingham, UK
12 INTEGRAL Science Data Centre
13 Geneva Observatory
14 OAC - INAF - Osservatorio Astronomico di Capodimonte
15 Dipartimento di Fisica dell'Università di Milano-Bicocca
16 Imperial College London
L. Tresse
- Fonction : Auteur
- PersonId : 743336
- IdHAL : laurence-tresse
- ORCID : 0000-0001-8776-0958
- IdRef : 088004031
M. Bolzonella
- Fonction : Auteur
O. Ilbert
- Fonction : Auteur
B. Marano
- Fonction : Auteur
A. Bongiorno
- Fonction : Auteur
Résumé
We investigate the dependence of galaxy clustering on the galaxy intrinsic luminosity at high redshift, using the data from the First Epoch VIMOS-VLT Deep Survey (VVDS). The size (6530 galaxies) and depth (IAB<24) of the survey allows us to measure the projected two-point correlation function of galaxies, w_p(r_p), for a set of volume-limited samples up to an effective redshift =0.9 and median absolute magnitude -19.6< MB < -21.3. Fitting w_p(r_p) with a single power-law model for the real-space correlation function ξ(r)=(r/r_0)-γ, we measure the relationship of the correlation length r0 and the slope γ with the sample median luminosity for the first time at such high redshift. Values from our lower-redshift samples (0.1=-19.6) have a correlation length r_0=2.7+0.3-0.3 h-1 Mpc, compared to r_0=5.0+1.5-1.6 h-1 Mpc at =-21.3. The slope of the correlation function is observed to correspondingly steepen significantly from γ=1.6+0.1-0.1 to γ=2.4+0.4-0.2. This is not observed either by large local surveys or in our lower-redshift samples and seems to imply a significant change in the way luminous galaxies trace dark-matter halos at z∼ 1 with respect to z∼ 0. At our effective median redshift z ≃ 0.9 this corresponds to a strong difference of the relative bias, from b/b* < 0.7 for galaxies with L < L* to b/b* ≃ 1.4 for galaxies with L > L*.
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