OMEGA: OSIRIS Mapping of Emission-Line Galaxies in A901/2

TL;DR

This study uses OSIRIS on the GTC telescope to map emission lines in galaxies within the Abell 901/902 cluster, aiming to understand how environment influences star formation and AGN activity.

Contribution

First spectrally and spatially resolved H-alpha and [NII] emission maps for a large galaxy sample in Abell 901/902, integrated with multi-wavelength data.

Findings

Detailed emission maps across diverse environments

Insights into environment's impact on star formation

Correlation between galaxy properties and activity

Abstract

This work presents the first results from an ESO Large Programme carried out using the OSIRIS instrument on the 10m GTC telescope (La Palma). We have observed a large sample of galaxies in the region of the Abell 901/902 system (z ~ 0.165) which has been extensively studied as part of the STAGES project. We have obtained spectrally and spatially resolved H-alpha and [NII] emission maps for a very large sample of galaxies covering a broad range of environments. The new data are combined with extensive multi-wavelength observations which include HST, COMBO-17, Spitzer, Galex and XMM imaging to study star formation and AGN activity as a function of environment and galaxy properties such as luminosity, mass and morphology. The ultimate goal is to understand, in detail, the effect of the environment on star formation and AGN activity.