Search Publications
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…
UBV(RI)C JHK observations of Hipparcos-selected nearby stars
Kilkenny, D.; Marang, F.; Koen, C. +1 more
We present homogeneous, standardized UBV(RI)C photometry for over 700 nearby stars selected on the basis of Hipparcos parallaxes. Additionally, we list JHK photometry for about half of these stars, as well as L photometry for 86 of the brightest. A number of stars with peculiar colours or anomalous locations in various colour-magnitude …
A Bayesian test for periodic signals in red noise
Vaughan, S.
Many astrophysical sources, especially compact accreting sources, show strong, random brightness fluctuations with broad power spectra in addition to periodic or quasi-periodic oscillations (QPOs) that have narrower spectra. The random nature of the dominant source of variance greatly complicates the process of searching for possible weak periodic…
Evolution of dust temperature of galaxies through cosmic time as seen by Herschel
Berta, S.; Magnelli, B.; Nordon, R. +112 more
We study the dust properties of galaxies in the redshift range 0.1 <~ z <~ 2.8 observed by the Herschel Space Observatory in the field of the Great Observatories Origins Deep Survey-North as part of the PACS Extragalactic Probe (PEP) and Herschel Multi-tiered Extragalactic Survey (HerMES) key programmes. Infrared (IR) luminosity (LIR