Search Publications
The GHOSTS survey - II. The diversity of halo colour and metallicity profiles of massive disc galaxies
Bell, Eric F.; Monachesi, Antonela; Radburn-Smith, David J. +5 more
We study the stellar halo colour properties of six nearby massive highly inclined disc galaxies using Hubble space telescope Advanced Camera for Surveys and Wide Field Camera 3 observations in both F606W and F814W filters from the GHOSTS (Galaxy Halos, Outer disks, Substructure, Thick disks, and Star clusters) survey. The observed fields probe the…
The galaxy UV luminosity function at z ≃ 2-4; new results on faint-end slope and the evolution of luminosity density
Mortlock, Alice; Dunlop, James S.; McLure, Ross J. +1 more
We present a new, robust measurement of the evolving rest-frame ultraviolet (UV) galaxy luminosity function (LF) over the key redshift range from z ≃ 2 to z ≃ 4. Our results are based on the high dynamic range provided by combining the Hubble Ultra Deep Field (HUDF), CANDELS/GOODS-South, and UltraVISTA/COSMOS surveys. We utilize the unparalleled m…
CHIMPS: the 13CO/C18O (J = 3 → 2) Heterodyne Inner Milky Way Plane Survey
White, G. J.; Moore, T. J. T.; Plume, R. +17 more
We present the 13CO/C18O (J = 3 → 2) Heterodyne Inner Milky Way Plane Survey (CHIMPS) which has been carried out using the Heterodyne Array Receiver Program on the 15 m James Clerk Maxwell Telescope (JCMT) in Hawaii. The high-resolution spectral survey currently covers |b| ≤ 0.5° and 28° ≲ l ≲ 46°, with an angular resolution …
Doppler imaging of the planetary debris disc at the white dwarf SDSS J122859.93+104032.9
Parsons, Steven G.; Breedt, Elmé; Gänsicke, Boris T. +6 more
Debris discs which orbit white dwarfs are signatures of remnant planetary systems. We present 12 yr of optical spectroscopy of the metal-polluted white dwarf SDSS J1228+1040, which shows a steady variation in the morphology of the 8600 Å Ca II triplet line profiles from the gaseous component of its debris disc. We identify additional emission line…
LoCuSS: Testing hydrostatic equilibrium in galaxy clusters
Finoguenov, A.; Smith, G. P.; Okabe, N. +17 more
We test the assumption of hydrostatic equilibrium in an X-ray luminosity selected sample of 50 galaxy clusters at 0.15 < z < 0.3 from the Local Cluster Substructure Survey (LoCuSS). Our weak-lensing measurements of M500 control systematic biases to sub-4 per cent, and our hydrostatic measurements of the same achieve excellent agre…
Fractal cometary dust - a window into the early Solar system
Bentley, M. S.; Mannel, T.; Schmied, R. +4 more
The properties of dust in the protoplanetary disc are key to understanding the formation of planets in our Solar system. Many models of dust growth predict the development of fractal structures which evolve into non-fractal, porous dust pebbles representing the main component for planetesimal accretion. In order to understand comets and their orig…
The extraordinary amount of substructure in the Hubble Frontier Fields cluster Abell 2744
Kneib, J. -P.; Egami, E.; Eckert, D. +21 more
We present a joint optical/X-ray analysis of the massive galaxy cluster Abell 2744 (z = 0.308). Our strong- and weak-lensing analysis within the central region of the cluster, I.e. at R < 1 Mpc from the brightest cluster galaxy, reveals eight substructures, including the main core. All of these dark matter haloes are detected with a significanc…
Measuring the dynamical state of Planck SZ-selected clusters: X-ray peak - BCG offset
Bersanelli, M.; Maino, D.; Rossetti, M. +6 more
We want to characterize the dynamical state of galaxy clusters detected with the Sunyaev-Zeldovich (SZ) effect by Planck and compare them with the dynamical state of clusters selected in X-rays survey. We analysed a representative subsample of the Planck SZ catalogue, containing the 132 clusters with the highest signal to noise ratio and character…
A Hubble Space Telescope survey of the host galaxies of Superluminous Supernovae
Lyman, J. D.; Angus, C. R.; Fruchter, A. S. +4 more
We present Hubble Space Telescope (HST) Wide Field Camera 3 UV and near-IR (nIR) imaging of 21 Superluminous Supernovae (SLSNe) host galaxies, providing a sensitive probe of star formation and stellar mass within the hosts. Comparing the photometric and morphological properties of these host galaxies with those of core-collapse supernovae (CCSNe) …
A spectroscopic survey of X-ray-selected AGNs in the northern XMM-XXL field
Georgakakis, A.; Salvato, M.; Buchner, J. +10 more
This paper presents a survey of X-ray-selected active galactic nuclei (AGNs) with optical spectroscopic follow-up in a ∼ 18 deg2 area of the equatorial XMM-XXL north field. A sample of 8445 point-like X-ray sources detected by XMM-Newton above a limiting flux of F_{0.5-10 keV} > 10^{-15} erg cm^{-2} s^{-1} was matched to optical (Slo…