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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

The galaxy environment in GAMA G3C groups using the Kilo Degree Survey Data Release 3

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Author(s):
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Costa-Duarte, V, M. ; Viola, M. [1] ; Molino, A. [2] ; Kuijken, K. [1] ; Sodre Jr, L. ; Bilicki, M. [1, 3] ; Brouwer, M. M. [1] ; Buddelmeijer, H. [1] ; Getman, F. [4] ; Grado, A. [4] ; de Jong, J. T. A. [1] ; Kleijn, V, G. ; Napolitano, N. [4] ; Puddu, E. [4] ; Radovich, M. [5] ; Vakili, M. [1]
Total Authors: 16
Affiliation:
[1] Costa-Duarte, M., V, Leiden Univ, Leiden Observ, POB 9513, NL-2300 RA Leiden - Netherlands
[2] Costa-Duarte, M., V, Univ Sao Paulo, Inst Astron Geofis & Ciencias Atmosfer, R Matao 1226, BR-05508090 Sao Paulo - Brazil
[3] Natl Ctr Nucl Res, Astrophys Div, POB 447, PL-90950 Lodz - Poland
[4] Osserv Astron Capodimonte, INAF, Via Moiariello 16, I-80131 Naples - Italy
[5] Osserv Astron Padova, INAF, Via Osservatorio 5, I-35122 Padua - Italy
Total Affiliations: 5
Document type: Journal article
Source: Monthly Notices of the Royal Astronomical Society; v. 478, n. 2, p. 1968-1979, AUG 2018.
Web of Science Citations: 2
Abstract

We aim to investigate the galaxy environment in GAMA Galaxy Groups Catalogue (G3C) using a volume-limited galaxy sample from the Kilo Degree Survey Data Release 3. The k-Nearest Neighbour technique is adapted to take into account the probability density functions of photometric redshifts in our calculations. This algorithm was tested on simulated KiDS tiles, showing its capability of recovering the relation between galaxy colour, luminosity, and local environment. The characterization of the galaxy environment in G3C groups shows systematically steeper density contrasts for more massive groups. The red galaxy fraction gradients in these groups is evident for most of group mass bins. The density contrast of red galaxies is systematically higher at group centres when compared to blue galaxy ones. In addition, distinct group centre definitions are used to show that our results are insensitive to centre definitions. These results confirm the galaxy evolution scenario which environmental mechanisms are responsible for a slow quenching process as galaxies fall into groups and clusters, resulting in a smooth observed colour gradients in galaxy systems. (AU)

FAPESP's process: 16/05254-9 - Investigating galaxy clusters in the photometric redshift space
Grantee:Marcus Vinícius Costa Duarte
Support type: Scholarships abroad - Research Internship - Post-doctor
FAPESP's process: 09/54006-4 - A computer cluster for the Astronomy Department of the University of São Paulo Institute of Astronomy, Geophysics and Atmospheric Sciences and for the Cruzeiro do Sul University Astrophysics Center
Grantee:Elisabete Maria de Gouveia Dal Pino
Support type: Multi-user Equipment Program
FAPESP's process: 14/18632-6 - The cosmic web described by superclusters of galaxies
Grantee:Marcus Vinícius Costa Duarte
Support type: Scholarships in Brazil - Post-Doctorate
FAPESP's process: 14/11806-9 - Challenges for the new generation of wide-field photometric redshift surveys like J-PAS
Grantee:Alberto Molino Benito
Support type: Scholarships in Brazil - Post-Doctorate