Open Access
The VIMOS-VLT deep survey: the group catalogue
O. Cucciati,C. Marinoni,A. Iovino,S. Bardelli,C. Adami,Alain Mazure +5 more
- pp 341
TLDR
In this paper, a complete catalog of optical galaxy groups identified in the purely flux-limited (17.5 ≤ IAB ≤ 24.0) VIMOS-VLT deep redshift Survey (VVDS) is presented.Abstract:
Aims. We present a homogeneous and complete catalogue of optical galaxy groups identified in the purely flux-limited (17.5 ≤ IAB ≤ 24.0) VIMOS-VLT deep redshift Survey (VVDS). Methods. We use mock catalogues extracted from the Millennium Simulation, to correct for potential systematics that might affect the overall distribution as well as the individual properties of the identified systems. Simulated samples allow us to forecast the number and properties of groups that can be potentially found in a survey with VVDS-like selection functions. We use them to correct for the expected incompleteness and, to asses in addition, how well galaxy redshifts trace the line-of-sight velocity dispersion of the underlying mass overdensity. In particular, on these mock catalogues we train the adopted group-finding technique i.e., the Voronoi-Delaunay Method (VDM). The goal is to fine-tune its free parameters, recover in a robust and unbiased way the redshift and velocity dispersion distributions of groups (n(z )a ndn(σ), respectively), and maximize, at the same time, the level of completeness and purity of the group catalogue. Results. We identify 318 VVDS groups with at least 2 members in the range 0.2 ≤ z ≤ 1.0, among which 144 (/30) with at least 3 (/5) members. The sample has an overall completeness of ∼60% and a purity of ∼50%. Nearly 45% of the groups with at least 3 members are still recovered if we run the algorithm with a particular parameter set that maximizes the purity (∼75%) of the resulting catalogue. We use the group sample to explore the redshift evolution of the fraction fb of blue galaxies (U − B ≤ 1) in the redshift range 0.2 ≤ z ≤ 1. We find that the fraction of blue galaxies is significantly lower in groups than in the global population (i.e. in the whole ensemble of galaxies irrespective of their environment). Both of these quantities increase with redshift, the fraction of blue galaxies in groups exhibiting a marginally significant steeper increase. We also investigate the dependence of fb on group richness: not only we confirm that, at any redshift, the blue fraction decreases in systems with increasing richness, but we find that this result continues to hold towards fainter luminosities.read more
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Radiation as a probe of the contemporary structure and history of the universe
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Journal ArticleDOI
The VIMOS VLT Deep Survey final data release: a spectroscopic sample of 35 016 galaxies and AGN out to z ~ 6.7 selected with 17.5 ≤ iAB ≤ 24.75
O. Le Fevre,P. Cassata,O. Cucciati,B. Garilli,O. Ilbert,V. Le Brun,D. Maccagni,C. Moreau,Marco Scodeggio,Laurence Tresse,G. Zamorani,C. Adami,Stéphane Arnouts,S. Bardelli,M. Bolzonella,M. Bondi,Angela Bongiorno,D. Bottini,A. Cappi,Stéphane Charlot,Paolo Ciliegi,T. Contini,S. de la Torre,Sylvie Foucaud,P. Franzetti,I. Gavignaud,Luigi Guzzo,A. Iovino,Brian C. Lemaux,C. López-Sanjuan,H. J. McCracken,Bruno Marano,Christian Marinoni,A. Mazure,Yannick Mellier,R. Merighi,Paola Merluzzi,Stéphane Paltani,R. Pello,A. Pollo,Lucia Pozzetti,Roberto Scaramella,L. A. M. Tasca,D. Vergani,Gianpaolo Vettolani,A. Zanichelli,E. Zucca +46 more
TL;DR: The VIMOS VLT Deep Survey (VVDS) as mentioned in this paper provides a comprehensive survey of the distant universe covering all epochs since z, or more than 12 Gyr of cosmic time, with a uniform selection.
Journal ArticleDOI
The GALEX Ultraviolet Virgo Cluster Survey (GUViCS). IV: The role of the cluster environment on galaxy evolution
Alessandro Boselli,E. Voyer,Samuel Boissier,Olga Cucciati,G. Consolandi,Luca Cortese,Michele Fumagalli,Michele Fumagalli,Giuseppe Gavazzi,Sebastien Heinis,Yannick Roehlly,E. Toloba,E. Toloba +12 more
TL;DR: In this paper, the role of the environment on galaxy evolution using a sample of 868 galaxies in the Virgo cluster and in its surrounding regions that are selected from the GALEX Ultraviolet Virgo Cluster Survey (GUViCS) with the purpose of understanding the origin of the red sequence in dense environments.
Journal ArticleDOI
An improved model for interplanetary dust fluxes in the outer Solar System
TL;DR: In this article, a dynamical dust grain tracing code is used to establish relative dust grain densities and three-dimensional velocity distributions in the outer Solar System for four main sources of dust grains.
Journal ArticleDOI
THE zCOSMOS 20k group catalog
C. Knobel,S. Lilly,A. Iovino,K. Kovac,T. J. Bschorr,V. Presotto,Pascal Oesch,Pascal Oesch,P. Kampczyk,C. M. Carollo,Thierry Contini,Thierry Contini,Jean-Paul Kneib,O. Le Fèvre,V. Mainieri,Alvio Renzini,M. Scodeggio,G. Zamorani,S. Bardelli,M. Bolzonella,Angela Bongiorno,Karina Caputi,Olga Cucciati,S. de la Torre,L. de Ravel,P. Franzetti,Bianca Garilli,F. Lamareille,F. Lamareille,J. F. Le Borgne,J. F. Le Borgne,V. Le Brun,Christian Maier,Christian Maier,M. Mignoli,R. Pello,R. Pello,Y. Peng,E. Perez Montero,E. Perez Montero,E. Perez Montero,John D. Silverman,Masayuki Tanaka,Lidia Tasca,Laurence Tresse,Daniela Vergani,E. Zucca,Luke A. Barnes,Rongmon Bordoloi,A. Cappi,Andrea Cimatti,Graziano Coppa,Anton M. Koekemoer,C. López-Sanjuan,H. J. McCracken,Michele Moresco,Preethi Nair,Lucia Pozzetti,Niraj Welikala +58 more
TL;DR: In this article, an optical group catalog between 0.1 z 1 and 16,500 high-quality spectroscopic redshifts in the completed zCOSMOS-bright survey is presented.
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