Speaker
Description
Since the early Universe, dark matter has come together under the effects of gravity to form massive haloes, within which galaxies form. This distribution of matter is not uniform and instead we see galaxies distributed in a web throughout the Universe - the large-scale structure. Alongside a number of factors (e.g mergers and feedback processes), these large scale environments are likely to have an impact on the properties of the galaxies which inhabit them. In this work we use the LOFAR Deep Fields to study the relationship between galaxies and their dark matter halo environments through studying the angular clustering of sources within the LOFAR Deep Fields. Through studying this angular clustering of LOFAR sources split by their source properties (source type, luminosity) using both the radio data alone and also combining with multi-wavelength sources in the fields, we study this connection between large scale environment and galaxy properties, through their bias. Bias is a proxy of how clustered galaxies are compared to the underlying matter. Through this work we are able to trace the bias of Star Forming Galaxies (SFGs) and Active Galactic Nuclei (AGN) to z~1.5 and discuss how this evolves and changes over cosmic time for different source properties. This allows us to gain understanding into how the galaxies which exist within haloes may be influenced or influence their dark matter haloes.
