Search Publications
Galaxies at z = 6-9 from the WFC3/IR imaging of the Hubble Ultra Deep Field
McLure, R. J.; Dunlop, J. S.; Koekemoer, A. M. +5 more
We present the results of a systematic search for galaxies in the redshift range z = 6-9, within the new, deep, near-infrared (Y, J, H) imaging of the Hubble Ultra Deep Field provided by the Wide Field Camera 3 (WFC3) on the Hubble Space Telescope. We have performed full spectral energy distribution fitting to the optical+infrared photometry of al…
Broad iron L line and X-ray reverberation in 1H0707-495
Ponti, G.; Fabian, A. C.; Miller, J. M. +5 more
A detailed analysis of a long XMM-Newton observation of the narrow-line type 1 Seyfert galaxy 1H0707-495 is presented, including spectral fitting, spectral variability and timing studies. The two main features in the spectrum are the drop at ~7keV and a complex excess below 1keV. These are well described by two broad, K and L, iron lines. Alternat…
The contribution of high-redshift galaxies to cosmic reionization: new results from deep WFC3 imaging of the Hubble Ultra Deep Field
Bunker, Andrew J.; Stark, Daniel P.; Ellis, Richard S. +6 more
We have searched for star-forming galaxies at z ~ 7-10 by applying the Lyman-break technique to newly released Y-, J- and H-band images (1.1, 1.25 and 1.6µm) from Wide Field Camera 3 (WFC3) on the Hubble Space Telescope. By comparing these images of the Hubble Ultra Deep Field with the Advanced Camera for Surveys (ACS) z'-band (0.85µm)…
Resolved spectroscopy of gravitationally lensed galaxies: recovering coherent velocity fields in subluminous z ~ 2-3 galaxies
Swinbank, A. M.; Richard, J.; Stark, D. P. +2 more
We present spatially resolved dynamics for six strongly lensed star-forming galaxies at z = 1.7-3.1, each enlarged by a linear magnification factor of ~×8. Using the Keck laser guide star AO system and the OH-Suppressing Infra-Red Imaging Spectrograph integral field unit spectrograph, we resolve kinematic and morphological detail in our sample wit…
AINUR: Atlas of Images of NUclear Rings
Knapen, J. H.; Comerón, S.; Beckman, J. E. +4 more
We present the most complete atlas of nuclear rings to date. We include 113 rings found in 107 galaxies, six of which are elliptical galaxies, five are highly inclined disc galaxies, 18 are unbarred disc galaxies and 78 are barred disc galaxies. Star-forming nuclear rings occur in 20 +/- 2 per cent of disc galaxies with types between T = -3 and T …
LoCuSS: first results from strong-lensing analysis of 20 massive galaxy clusters at z = 0.2
Richard, Johan; Smith, Graham P.; Egami, E. +13 more
We present a statistical analysis of a sample of 20 strong lensing clusters drawn from the Local Cluster Substructure Survey, based on high-resolution Hubble Space Telescope imaging of the cluster cores and follow-up spectroscopic observations using the Keck-I telescope. We use detailed parametrized models of the mass distribution in the cluster c…
Globular cluster systems in nearby dwarf galaxies - III. Formation efficiencies of old globular clusters
Georgiev, Iskren Y.; Goudfrooij, Paul; Puzia, Thomas H. +1 more
We investigate the origin of the shape of the globular cluster (GC) system scaling parameters as a function of galaxy mass, i.e. specific frequency (SN), specific luminosity (SL), specific mass (SM) and specific number () of GCs. In the low-mass galaxy regime (MV >~ -16 mag), our analysis is based on …
The host galaxies of core-collapse supernovae and gamma-ray bursts
Fruchter, A. S.; Levan, A. J.; Tanvir, N. R. +2 more
We present a comparative study of the galactic and small-scale environments of gamma-ray bursts (GRBs) and core-collapse supernovae (CCSNe). We use a sample of 34 GRB hosts at z < 1.2, and a comparison sample of 58 supernova hosts located within the Great Observatories Origins Deep Survey footprint. We fit template spectra to the available phot…
Ultraviolet tails and trails in cluster galaxies: a sample of candidate gaseous stripping events in Coma
Hornschemeier, Ann E.; Hudson, Michael J.; Marzke, Ronald O. +10 more
We have used new deep observations of the Coma cluster from Galaxy Evolution Explorer to visually identify 13 star-forming galaxies with asymmetric morphologies in the ultraviolet (UV). Aided by wide-field optical broad-band and Hα imaging, we interpret the asymmetric features as being due to star formation within gas stripped from the galaxies by…
The Herschel Multi-Tiered Extragalactic Survey: source extraction and cross-identifications in confusion-dominated SPIRE images
Altieri, B.; Aussel, H.; Elbaz, D. +83 more
We present the cross-identification and source photometry techniques used to process Herschel SPIRE imaging taken as part of the Herschel Multi-Tiered Extragalactic Survey (HerMES). Cross-identifications are performed in map-space so as to minimize source-blending effects. We make use of a combination of linear inversion and model selection techni…