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

Understand

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 (PDFs) 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.