Search Publications
A systematic search for very massive galaxies at z > 4
McLure, R. J.; Dunlop, J. S.; Cirasuolo, M.
Motivated by the claimed discovery of a very massive galaxy (HUDF-JD2; M ~= 5 × 1011Msolar) at extreme redshift (z = 6.5) within the Hubble Ultra Deep Field (HUDF), we have completed a systematic search for comparably massive galaxies with z > 4 among the 2688 galaxies in our KS < 23.5 (AB) catalogue within t…
Differential evolution of the UV luminosity function of Lyman break galaxies from z ~ 5 to 3
Akiyama, M.; Sawicki, M.; Aoki, K. +5 more
We report the ultraviolet luminosity function (UVLF) of Lyman break galaxies at z ~ 5 derived from a deep and wide survey using the prime focus camera of the 8.2 m Subaru telescope (Suprime-Cam). Target fields consist of two blank regions of the sky, namely, the region including the Hubble Deep Field-North and the J0053+1234 region, and the total …
Gemini GMOS/IFU spectroscopy of NGC 1569 - I. Mapping the properties of a young star cluster and its environment
Gallagher, J. S.; Smith, L. J.; Westmoquette, M. S. +1 more
We present Gemini-North GMOS/IFU observations of a young star cluster and its environment near the centre of the dwarf irregular starburst galaxy NGC 1569. This forms part of a larger and ongoing study of the formation and collimation mechanisms of galactic winds, including three additional IFU pointings in NGC 1569 covering the base of the galact…
Resolved spectroscopy of a gravitationally lensed L* Lyman-break galaxy at z ~ 5
Kneib, J. -P.; Smith, Graham P.; Smail, Ian +5 more
We exploit the gravitational potential of a massive, rich cluster at z = 0.77 to study the internal properties of a gravitationally lensed galaxy at z = 4.88. Using high-resolution Hubble Space Telescope imaging together with optical (VIMOS) and near-infrared (SINFONI) integral field spectroscopy, we have studied the rest-frame ultraviolet and opt…
Constraints on physical properties of z ~ 6 galaxies using cosmological hydrodynamic simulations
Davé, Romeel; Finlator, Kristian; Oppenheimer, Benjamin D.
We conduct a detailed comparison of broad-band spectral energy distributions of six z >~ 5.5 galaxies against galaxies drawn from cosmological hydrodynamic simulations. We employ a new tool called SPOC (Simulated photometry-derived observational constraints), which constrains the physical properties of observed galaxies through a Bayesian likel…
A wide deep infrared look at the Pleiades with UKIDSS: new constraints on the substellar binary fraction and the low-mass initial mass function
Hambly, N. C.; Hodgkin, S. T.; Jameson, R. F. +3 more
We present the results of a deep wide-field near-infrared survey of 12 deg2 of the Pleiades conducted as part of the United Kingdom Infrared Telescope (UKIRT) Infrared Deep Sky Survey (UKIDSS) Galactic Cluster Survey (GCS). We have extracted over 340 high-probability proper motion (PM) members down to 0.03 M⊙ using a combinat…
Substructure in lensing clusters and simulations
Springel, Volker; Natarajan, Priyamvada; De Lucia, Gabriella
We present high-resolution mass reconstructions for five massive cluster-lenses spanning a redshift range from z = 0.18 to 0.57 utilizing archival Hubble Space Telescope data and applying galaxy-galaxy lensing techniques. These detailed mass models were obtained from the observations by combining constraints from the strong and weak lensing regime…
Magnetic fields in planetary nebulae and post-AGB nebulae
Sabin, L.; Greaves, J. S.; Zijlstra, Albert A.
Magnetic fields are an important but largely unknown ingredient of planetary nebulae. They have been detected in oxygen-rich asymptotic giant branch (AGB) and post-AGB stars, and may play a role in the shaping of their nebulae. Here we present SCUBA submillimetre polarimetric observations of four bipolar planetary nebulae and post-AGB stars, inclu…
Exciting the magnetosphere of the magnetar CXOU J164710.2-455216 in Westerlund 1
Muno, M. P.; Pooley, D.; Gaensler, B. M. +4 more
We describe XMM-Newton observations taken 4.3 d prior to and 1.5 d subsequent to two remarkable events that were detected with Swift on 2006 September 21 from the candidate magnetar CXOU J164710.2-455216: (i) a 20-ms burst with an energy of 1037 erg (15-150 keV), and (ii) a rapid spin-down (glitch) with Δ P/P ~ -10-4. We find…
Gravitational lensing by cosmic strings: what we learn from the CSL-1 case
Paolillo, M.; Grogin, N. A.; Schreier, E. J. +5 more
Cosmic strings were postulated by Kibble in 1976 and, from a theoretical point of view, their existence finds support in modern superstring theories, both in compactification models and in theories with extended additional dimensions. Their eventual discovery would lead to significant advances in both cosmology and fundamental physics. One of the …