Publications based on UDS data

A library of UDS publications may be found here (courtesy NASA ADS). A selection of recent scientific highlights is given below.

conformity publications Wilkinson et al. (2017) used the UDS to study the clustering of submillimetre galaxies (SMGs), which are highly luminous dust-enshrouded galaxies in the distant Universe. The strength of clustering on large scales provides a method for estimating the typical dark matter halo mass for this unique population. It was found that SMGs are very strongly clustered at high redshift (z>2.5), consistent with being the progenitors of massive elliptical galaxies in the present-day Universe.

Wild et
                al. 2014Maltby et al. (2016) used deep spectroscopy at VLT to confirm the existence of a large population of recently-quenched galaxies in the UDS field. Known as "post-starburst" galaxies, these are rare transition systems in which a major burst of star formation was recently switched off. The spectroscopic confirmation suggests that photometric methods (presented in Wild et al. 2014) can be used to select large samples of post-starburst galaxies in the distant Universe.

conformity publications Hartley et al. (2015) and Kawinwanichakij et al. (2016) studied the star-forming properties of central and satellite galaxies in the UDS, to investigate the quenching of galaxies to z~2. They found evidence for "galactic conformity", with quiescent satellites more likely to be located around quiescent central galaxies.

Mortlock et
                al. 2015 Mortlock et al. (2015) studied the evolution of the galaxy stellar mass function to z=3, tracing the build-up of the galaxy population. Separating galaxies by colour, mass, and structural parameters, they found that high mass passive galaxies at all redshifts are dominated by systems with high Sersic indices, suggesting a link between passivity and morphological transformation.

Wild et
                al. 2014Wild et al. (2014) developed a new technique to classify galaxies in deep surveys, based on a Principal Component Analysis (PCA) of the multi-wavelength data in the UDS. In addition to separating passive and star-forming galaxies, the PCA technique identifies a distinct class of galaxies that have formed a large fraction of their mass in a recently quenched starburst. These rare objects, known as post-starburst galaxies (PSBs) provide a unique opportunity to understand the quenching of star formation in the distant Universe. The validity of the technique was confirmed with deep spectroscopy from VLT.

Bradshaw et al. 2013 Bradshaw et al. (2013) used deep VLT spectroscopy to study large-scale outflows of gas from galaxies in the UDS. The subtle signatures of outflows were identified using the interstellar [MgII] absorption line, which required stacking spectra (typically galaxies 50 per bin). They found that high-velocity outflows are very common at high redshift (z>1), with outflow velocities increasing strongly with specfic star formation rate or colour. Velocities approaching 1000 km/s were observed for the most extreme star-forming galaxies.

Hartley et al. 2013. Hartley et al. (2013) studied the evolution of galaxy clustering in the UDS field. The large-scale clustering of galaxies is governed by the distribution of dark matter halos, and provides a unique way to measure the typical halo mass for galaxies in different classes. In this paper, they find that halo mass is strongly correlated with the termination of star formation, with quiescent galaxies residing in the most massive dark-matter haloes at all redshifts (to z~3). The results may provide evidence that star-formation is quenched once the host dark matter haloes reach a critical mass of approximately 1013 solar masses.