The VIMOS VLT Deep Survey: the group catalogue
O. Cucciati, C. Marinoni, A. Iovino, S. Bardelli, C. Adami, A. Mazure,, M. Scodeggio, D. Maccagni, S. Temporin, E. Zucca, G. De Lucia, J. Blaizot, B., Garilli, B. Meneux, G. Zamorani, O. Le F\`evre, A. Cappi, L. Guzzo, D., Bottini, V. Le Brun, L. Tresse, G. Vettolani

TL;DR
This paper presents a comprehensive catalogue of galaxy groups from the VVDS survey, using mock simulations to optimize detection methods, and studies the evolution of galaxy properties within these groups across redshifts.
Contribution
It introduces a robust group-finding technique calibrated with simulations, providing a complete catalogue and analyzing galaxy color evolution in groups over time.
Findings
Identified 318 galaxy groups in VVDS with 60% completeness and 50% purity.
Blue galaxy fraction is lower in groups than in the general galaxy population.
Blue galaxy fraction increases with redshift and decreases with group richness.
Abstract
[Abridged] We present a homogeneous and complete catalogue of optical groups identified in the purely flux limited (17.5<=I<=24.0) VIMOS-VLT Deep Survey (VVDS). 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 also to asses how well galaxy redshifts trace the line-of-sight velocity dispersion of the underlying mass overdensity. In particular, we train on these mock catalogues the adopted group-finding technique (the Voronoi-Delaunay Method, VDM). The goal is to fine-tune its free parameters, recover in a robust and…
Peer Reviews
No public reviews on file for this paper yet. If you reviewed it on a platform where reviews are public (OpenReview, ICLR, NeurIPS, ICML), you can paste yours below so the community can read it here.
Videos
No videos yet. Explain this paper in a talk, walkthrough, or lecture? Add one.
Taxonomy
TopicsAstronomy and Astrophysical Research · Adaptive optics and wavefront sensing · Astronomical Observations and Instrumentation
