Search Publications
The death of massive stars - I. Observational constraints on the progenitors of Type II-P supernovae
Smartt, S. J.; Maund, J. R.; Eldridge, J. J. +1 more
We present the results of a 10.5-yr, volume-limited (28-Mpc) search for supernova (SN) progenitor stars. In doing so we compile all SNe discovered within this volume (132, of which 27 per cent are Type Ia) and determine the relative rates of each subtype from literature studies. The core-collapse SNe break down into 59 per cent II-P and 29 per cen…
Galaxy Zoo Green Peas: discovery of a class of compact extremely star-forming galaxies
Schawinski, Kevin; Keel, William C.; Sarzi, Marc +14 more
We investigate a class of rapidly growing emission line galaxies, known as `Green Peas', first noted by volunteers in the Galaxy Zoo project because of their peculiar bright green colour and small size, unresolved in Sloan Digital Sky Survey imaging. Their appearance is due to very strong optical emission lines, namely [OIII] λ5007Å, with an unusu…
Quantifying the coexistence of massive black holes and dense nuclear star clusters
Spitler, Lee R.; Graham, Alister W.
In large spheroidal stellar systems, such as elliptical galaxies, one invariably finds a 106-109Msolar supermassive black hole at their centre. In contrast, within dwarf elliptical galaxies one predominantly observes a 105-107Msolar nuclear star cluster. To date, few galaxies have b…
Kinematic properties of early-type galaxy haloes using planetary nebulae*
Freeman, K. C.; Capaccioli, M.; Napolitano, N. R. +11 more
We present new planetary nebulae (PNe) positions, radial velocities and magnitudes for six early-type galaxies obtained with the Planetary Nebulae Spectrograph (PNS), along with derived two-dimensional velocity and velocity dispersion fields, and the α parameters (i.e. the number of PNe per unit luminosity). We also present new deep absorption-lin…
The STAGES view of red spirals and dusty red galaxies: mass-dependent quenching of star formation in cluster infall
Papovich, Casey; Bell, Eric F.; Gallazzi, Anna +22 more
We investigate the properties of optically passive spirals and dusty red galaxies in the A901/2 cluster complex at redshift ~0.17 using rest-frame near-ultraviolet-optical spectral energy distributions, 24-µm infrared data and Hubble Space Telescope morphologies from the STAGES data set. The cluster sample is based on COMBO-17 redshifts with…
New multiply-lensed galaxies identified in ACS/NIC3 observations of Cl0024+1654 using an improved mass model
Broadhurst, Tom; Zheng, Wei; Zitrin, Adi +9 more
We present an improved strong-lensing analysis of Cl0024+1654 (z = 0.39) using deep Hubble Space Telescope (HST)/Advanced Camera for Surveys (ACS)/NIC3 images, based on 33 multiply-lensed images of 11 background galaxies. These are found with a model that assumes mass approximately traces light, with a low-order expansion to allow for flexibility …
The structures of distant galaxies - III. The merger history of over 20000 massive galaxies at z < 1.2
Conselice, Christopher J.; Bluck, Asa F. L.; Yang, Cui
Utilizing deep Hubble Space Telescope imaging from the two largest field galaxy surveys, the Extended Groth Strip and the Cosmic Evolution Survey (COSMOS), we examine the structural properties, and derive the merger history for 21902 galaxies with M* > 1010Msolar at z < 1.2. We examine the structural concentr…
HiZELS: a high-redshift survey of Hα emitters - II. The nature of star-forming galaxies at z = 0.84
Ivison, R. J.; Smail, Ian; Cirasuolo, M. +7 more
New results from a large survey of Hα emission-line galaxies at z = 0.84 using the Wide Field Camera on the United Kingdom Infrared Telescope and a custom narrow-band filter in the J band are presented as part of the High-z Emission Line Survey (HiZELS). The deep narrow-band images reach an effective flux limit of FHα ~ 10-16…
The Hubble flow around the Local Group
Karachentsev, I. D.; Kashibadze, O. G.; Tully, R. B. +1 more
We use updated data on distances and velocities of galaxies in the proximity of the Local Group (LG) in order to establish properties of the local Hubble flow. For 30 neighbouring galaxies with distances 0.7 < DLG < 3.0 Mpc, the local flow is characterized by the Hubble parameter Hloc = (78 +/- 2)kms-1 Mpc
Optical-to-X-ray emission in low-absorption AGN: results from the Swift-BAT 9-month catalogue
Fabian, A. C.; Mushotzky, R. F.; Winter, L. M. +1 more
We present simultaneous optical-to-X-ray spectral energy distributions (SEDs) from Swift's X-ray and UV-optical telescopes (XRTs and UVOTs) for a well-selected sample of 26 low-redshift (z < 0.1) active galactic nuclei (AGN) from the Swift/Burst Alert Telescope 9-month catalogue, the largest well-studied, hard X-ray-selected survey of local AGN…