Search Publications
The SAURON project - I. The panoramic integral-field spectrograph
Emsellem, Eric; Miller, Bryan W.; Carollo, C. M. +10 more
A new integral-field spectrograph, SAURON, is described. It is based on the TIGER principle, and uses a lenslet array. SAURON has a large field of view and high throughput, and allows simultaneous sky subtraction. Its design is optimized for studies of the stellar kinematics, gas kinematics, and line-strength distributions of nearby early-type gal…
The black hole masses of Seyfert galaxies and quasars
McLure, R. J.; Dunlop, J. S.
The central black hole masses of a sample of 30 luminous quasars are estimated using Hβ full width half-maximum (FWHM) measurements from a combination of new and previously published nuclear spectra. The quasar black hole mass estimates are combined with reverberation-mapping measurements for a sample of Seyfert galaxies in order to study active g…
M82-F: a doomed super star cluster?
Smith, Linda J.; Gallagher, John S.
We present high-dispersion echelle spectroscopy of the very luminous, young super star cluster (SSC) `F' in M82, obtained with the 4.2-m William Herschel Telescope, for the purpose of deriving its dynamical mass and assessing whether it will survive to become an old globular cluster. In addition to the stellar lines, the spectrum contains complex …
Galaxy number counts - V. Ultradeep counts: the Herschel and Hubble Deep Fields
McCracken, H. J.; Campos, A.; Metcalfe, N. +2 more
We present u,b,r and i galaxy number counts and colours from both the North and South Hubble Space Telescope Deep Fields and the William Herschel Deep Field. The latter comprises a 7×7arcmin2 area of sky, reaching b~28.5 at its deepest. Following Metcalfe et al., we show that simple Bruzual & Charlot evolutionary models which assume…
Bipolar outflows in OH/IR stars
Norris, R. P.; Molster, F. J.; Comeron, F. +5 more
We investigate the development of bipolar outflows during the early post-AGB evolution. A sample of 10 OH/IR stars with irregular OH spectra and unusually large expansion velocities is observed at high angular resolution. The sample includes bipolar nebulae (e.g., OH231.8+4.2), bright post-AGB stars (HD 101584) and reflection nebulae (e.g., Robert…
Evidence for evolving spheroidals in the Hubble Deep Fields North and South
Menanteau, F.; Abraham, R. G.; Ellis, R. S.
We investigate the dispersion in the internal colours of faint spheroidals in the Hubble Deep Fields North and South. In high-redshift rapid-collapse scenarios, the dispersion in internal colours should be small at moderate redshift apart from a small metallicity induced reddening in the enriched cores. However, recently assembled spheroidals are …
Chandra observations of the X-ray jet in 3C 66B
Hardcastle, M. J.; Birkinshaw, M.; Worrall, D. M.
Our Chandra observation of the FR I radio galaxy 3C 66B has resulted in the first detection of an X-ray counterpart to the previously known radio, infrared and optical jet. The X-ray jet is detected up to 7arcsec from the core and has a steep X-ray spectrum, α~1.3+/-0.1. The overall X-ray flux density and spectrum of the jet are consistent with a …
A NICMOS imaging study of high-z quasar host galaxies
Baum, Stefi A.; O'Dea, Christopher P.; Dunlop, James S. +4 more
We present the first results from a major Hubble Space Telescope programme designed to investigate the cosmological evolution of quasar host galaxies from µ z≃ 2r to the present day. Here we describe J and H-band NICMOS imaging of two quasar samples at redshifts of 0.9 and 1.9 respectively. Each sample contains equal numbers of radio-loud an…
HST/WFPC2 imaging of the QDOT ultraluminous infrared galaxy sample
Farrah, D.; Colina, L.; Serjeant, S. +6 more
We present HST WFPC2 V-band imaging for 23 ultraluminous infrared galaxies (ULIRGs) taken from the QDOT redshift survey. The fraction of sources observed to be interacting is 87 per cent. Most of the merging systems show a number of compact `knots', whose colour and brightness differ substantially from their immediate surroundings. Colour maps for…
The properties of field elliptical galaxies at intermediate redshift - II. Photometry and spectroscopy of an HST-selected sample
Treu, T.; Stiavelli, M.; Møller, P. +2 more
A sample of field early-type galaxies (E/S0) at intermediate redshift (z~0.1-0.6) is selected, based on morphology and colours from HST-WFPC2 parallel images. Photometric structural parameters (effective radius Re and effective surface brightness SBe) are derived through the F606W and F814W filters, using luminosity profile f…