The VIMOS-VLT deep survey. Color bimodality and the mix of galaxy populations up to z ~ 2
P. Franzetti
(1)
,
Marco Scodeggio
(1)
,
Bianca Garilli
(1)
,
D. Vergani
(1)
,
D. Maccagni
(1)
,
L. Guzzo
(2)
,
Laurence Tresse
(3)
,
Olivier Ilbert
(4)
,
Fabrice Lamareille
(5)
,
Thierry Contini
(6)
,
Olivier Le Fèvre
(3)
,
G. Zamorani
(5)
,
J. Brinchmann
(7)
,
Stéphane Charlot
(8)
,
D. Bottini
(1)
,
V. Le Brun
(3)
,
J.-P. Picat
(6)
,
R. Scaramella
(9)
,
G. Vettolani
(9)
,
A. Zanichelli
(9)
,
C. Adami
(3)
,
S. Arnouts
(3)
,
Sandro Bardelli
(5)
,
M. Bolzonella
(5)
,
A. Cappi
(5)
,
Paolo Ciliegi
(5)
,
S. Foucaud
(10)
,
I. Gavignaud
(11)
,
Angela Iovino
(2)
,
Henry J. Mccracken
(8, 12)
,
B. Marano
(13)
,
Christian Marinoni
(14)
,
A. Mazure
(3)
,
Baptiste Meneux
(1)
,
R. Merighi
(5)
,
S. Paltani
(15)
,
R. Pello
(6)
,
Agnieszka Pollo
(3)
,
L. Pozzetti
(6)
,
M. Radovich
(16)
,
E. Zucca
(5)
,
O. Cucciati
(2)
,
C. Jakob Walcher
(3)
1
IASF-Milano -
Istituto di Astrofisica Spaziale e Fisica Cosmica
2 INAF-Osservatorio Astronomico di Brera
3 LAM - Laboratoire d'Astrophysique de Marseille
4 Institute for Astronomy, University of Hawaii
5 OABO - INAF-Osservatorio Astronomico di Bologna
6 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
7 Universidade do Porto = University of Porto
8 IAP - Institut d'Astrophysique de Paris
9 Istituto di Radioastronomia, Bologna
10 UON - University of Nottingham, UK
11 AIP - Astrophysikalisches Institut Potsdam
12 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
13 UNIBO - Alma Mater Studiorum Università di Bologna = University of Bologna
14 CPT - Centre de Physique Théorique - UMR 7332
15 INTEGRAL Science Data Centre
16 INAF-OAC - INAF-Osservatorio Astronomico di Capodimonte
2 INAF-Osservatorio Astronomico di Brera
3 LAM - Laboratoire d'Astrophysique de Marseille
4 Institute for Astronomy, University of Hawaii
5 OABO - INAF-Osservatorio Astronomico di Bologna
6 LATT - Laboratoire Astrophysique de Toulouse-Tarbes
7 Universidade do Porto = University of Porto
8 IAP - Institut d'Astrophysique de Paris
9 Istituto di Radioastronomia, Bologna
10 UON - University of Nottingham, UK
11 AIP - Astrophysikalisches Institut Potsdam
12 LERMA - Laboratoire d'Etude du Rayonnement et de la Matière en Astrophysique
13 UNIBO - Alma Mater Studiorum Università di Bologna = University of Bologna
14 CPT - Centre de Physique Théorique - UMR 7332
15 INTEGRAL Science Data Centre
16 INAF-OAC - INAF-Osservatorio Astronomico di Capodimonte
Résumé
Aims: In this paper we discuss the mix of star-forming and passive galaxies up to z ~ 2, based on the first epoch VIMOS-VLT Deep Survey (VVDS) data.
Methods: We compute rest-frame magnitudes and colors and analyse the color-magnitude relation and the color distributions. We also use the multi-band VVDS photometric data and spectral templates fitting to derive multi-color galaxy types. Using our spectroscopic dataset we separate galaxies based on a star-formation activity indicator derived combining the equivalent width of the [OII] emission line and the strength of the D_n(4000) continuum break.
Results: In agreement with previous works we find that the global galaxy rest-frame color distribution follows a bimodal distribution at z
Methods: We compute rest-frame magnitudes and colors and analyse the color-magnitude relation and the color distributions. We also use the multi-band VVDS photometric data and spectral templates fitting to derive multi-color galaxy types. Using our spectroscopic dataset we separate galaxies based on a star-formation activity indicator derived combining the equivalent width of the [OII] emission line and the strength of the D_n(4000) continuum break.
Results: In agreement with previous works we find that the global galaxy rest-frame color distribution follows a bimodal distribution at z
Domaines
Astrophysique [astro-ph]
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