Search Publications
Field O stars: formed in situ or as runaways?
Gvaramadze, V. V.; Pflamm-Altenburg, J.; Kroupa, P. +1 more
A significant fraction of massive stars in the Milky Way and other galaxies are located far from star clusters and star-forming regions. It is known that some of these stars are runaways, i.e. possess high space velocities (determined through the proper motion and/or radial velocity measurements), and therefore most likely were formed in embedded …
Discovery of bright z ≃ 7 galaxies in the UltraVISTA survey
Taniguchi, Y.; Bowler, R. A. A.; McLure, R. J. +10 more
We have exploited the new, deep, near-infrared UltraVISTA imaging of the Cosmological Evolution Survey (COSMOS) field, in tandem with deep optical and mid-infrared imaging, to conduct a new search for luminous galaxies at redshifts z ≃ 7. The year-one UltraVISTA data provide contiguous Y, J, H, Ks imaging over 1.5 deg2, reach…
Herschel-ATLAS/GAMA: a census of dust in optically selected galaxies from stacking at submillimetre wavelengths
Rodighiero, G.; Ivison, R. J.; Clements, D. L. +42 more
We use the Herschel-ATLAS survey to conduct the first large-scale statistical study of the submillimetre properties of optically selected galaxies. Using ∼80 000 r-band selected galaxies from 126 deg2 of the GAMA survey, we stack into submillimetre imaging at 250, 350 and 500 µ m to gain unprecedented statistics on the dust emissi…
The SWELLS survey - IV. Precision measurements of the stellar and dark matter distributions in a spiral lens galaxy
Treu, Tommaso; Marshall, Philip J.; Auger, Matthew W. +6 more
We construct a fully self-consistent mass model for the lens galaxy SDSS J2141 at redshift 0.14, and use it to improve on previous studies by modelling its gravitational lensing effect, gas rotation curve and stellar kinematics simultaneously. We adopt a very flexible axisymmetric mass model constituted by a generalized Navarro-Frenk-White (NFW) d…
Dust in historical Galactic Type Ia supernova remnants with Herschel
Ivison, R. J.; Henning, Th.; Krause, O. +13 more
The origin of interstellar dust in galaxies is poorly understood, particularly the relative contributions from supernovae and the cool stellar winds of low-intermediate-mass stars. Recently, large masses of newly formed dust have been discovered in the ejecta of core-collapse supernovae. Here, we present Herschel Photodetector Array Camera and Spe…
Steep faint-end slopes of galaxy mass and luminosity functions at z≥ 6 and the implications for reionization
Jaacks, Jason; Choi, Jun-Hwan; Nagamine, Kentaro +2 more
We present the results of a numerical study comparing photometric and physical properties of simulated z= 6-9 galaxies to the observations taken by the Wide Field Camera 3 instrument aboard the Hubble Space Telescope. Using cosmological hydrodynamical simulations we find good agreement with observations in colour-colour space at all studied redshi…
No evidence for Lyman α emission in spectroscopy of z > 7 candidate galaxies
Wilkins, Stephen M.; Bunker, Andrew J.; Caruana, Joseph +5 more
We present Gemini/Gemini Near Infrared Spectrograph (GNIRS) spectroscopic observations of four z-band (z ≈ 7) dropout galaxies and Very Large Telescope (VLT)/XSHOOTER observations of one z-band dropout and three Y-band (z ≈ 8-9) dropout galaxies in the Hubble Ultra Deep Field, which were selected with Wide Field Camera 3 imaging on the Hubble Spac…
Constraining the absolute orientation of η Carinae's binary orbit: a 3D dynamical model for the broad [Fe III] emission
Gull, T. R.; Madura, T. I.; Owocki, S. P. +3 more
We present a three-dimensional (3D) dynamical model for the broad [Fe III] emission observed in η Carinae using the Hubble Space Telescope/Space Telescope Imaging Spectrograph (STIS). This model is based on full 3D smoothed particle hydrodynamics simulations of η Car's binary colliding winds. Radiative transfer codes are used to generate synthetic…
Sunyaev-Zel'dovich clusters in Millennium gas simulations
Thomas, Peter A.; Kay, Scott T.; Liddle, Andrew R. +5 more
Large surveys using the Sunyaev-Zel'dovich (SZ) effect to find clusters of galaxies are now starting to yield large numbers of systems out to high redshift, many of which are new discoveries. In order to provide theoretical interpretation for the release of the full SZ cluster samples over the next few years, we have exploited the large-volume Mil…
The Herschel Virgo Cluster Survey - VIII. The Bright Galaxy Sample
Ciesla, L.; Bianchi, S.; Fritz, J. +20 more
We describe the Herschel Virgo Cluster Survey and the first data that cover the complete survey area (four 4 × 4 deg2 regions). We use these data to measure and compare the global far-infrared properties of 78 optically bright galaxies that are selected at 500 µm and detected in all five far-infrared bands. We show that our measur…