Search Publications
The SAURON project - IV. The mass-to-light ratio, the virial mass estimator and the Fundamental Plane of elliptical and lenticular galaxies
Krajnović, Davor; Emsellem, Eric; van de Ven, Glenn +12 more
We investigate the well-known correlations between the dynamical mass-to-light ratio (M/L) and other global observables of elliptical (E) and lenticular (S0) galaxies. We construct two-integral Jeans and three-integral Schwarzschild dynamical models for a sample of 25 E/S0 galaxies with SAURON integral-field stellar kinematics to about one effecti…
The SAURON project - V. Integral-field emission-line kinematics of 48 elliptical and lenticular galaxies
Bacon, Roland; Krajnović, Davor; Emsellem, Eric +10 more
We present the emission-line fluxes and kinematics of 48 representative elliptical and lenticular galaxies obtained with our custom-built integral-field spectrograph, SAURON, operating on the William Herschel Telescope. Hβ, [OIII]λλ4959,5007 and [NI]λλ5198,5200 emission lines were measured using a new procedure that simultaneously fits both the st…
The Hubble Deep Field-North SCUBA Super-map - IV. Characterizing submillimetre galaxies using deep Spitzer imaging
Dickinson, Mark; Daddi, Emanuele; Chary, Ranga-Ram +9 more
We present spectral energy distributions (SEDs), Spitzer colours, and infrared (IR) luminosities for 850-µm selected galaxies in the Great Observatories Origins Deep Survey Northern (GOODS-N) field. Using the deep Spitzer Legacy images and new data and reductions of the Very Large Array-Hubble Deep Field (VLA-HDF) radio data, we find statist…
Evidence for the strong effect of gas removal on the internal dynamics of young stellar clusters
Bastian, N.; Goodwin, S. P.
We present detailed luminosity profiles of the young massive clusters M82-F, NGC 1569-A and NGC 1705-1 which show significant departures from equilibrium (King and Elson, Fall & Freeman) profiles. We compare these profiles with those from N-body simulations of clusters that have undergone the rapid removal of a significant fraction of their ma…
The SAURON project - VII. Integral-field absorption and emission-line kinematics of 24 spiral galaxy bulges
Bacon, Roland; Krajnović, Davor; Emsellem, Eric +10 more
We present observations of the stellar and gas kinematics for a representative sample of 24 Sa galaxies obtained with our custom-built integral-field spectrograph SAURON operating on the William Herschel Telescope. The data have been homogeneously reduced and analysed by means of a dedicated pipeline. All resulting data cubes were spatially binned…
The link between submillimetre galaxies and luminous ellipticals: near-infrared IFU spectroscopy of submillimetre galaxies
Ivison, R. J.; Smail, Ian; Swinbank, A. M. +5 more
We present two-dimensional spectroscopy covering the rest-frame wavelengths of strong optical emission lines in six luminous submillimetre galaxies (SMGs) at z = 1.3-2.5. Using this near-infrared integral field spectroscopy together with Hubble Space Telescope ACS and NICMOS imaging, we map the dynamics and morphologies of these systems on scales …
Parametric strong gravitational lensing analysis of Abell 1689
Pannella, M.; Seitz, S.; Halkola, A.
We have derived the mass distribution of galaxy cluster Abell 1689 within 0.3h-170Mpc of the cluster centre using its strong lensing (SL) effect on 32 background galaxies, which are mapped in altogether 107 multiple images. The multiple images are based on some from the literature with modifications to both include new and ex…
HST/STIS optical spectroscopy of five super star clusters in the starburst galaxy M82
O'Connell, R. W.; Gallagher, J. S.; Smith, L. J. +3 more
We present optical spectroscopy obtained with the Space Telescope Imaging Spectrograph of five young massive star clusters in the starburst galaxy M82. A detailed analysis is performed for one cluster `M82-A1' and its immediate environment in the starburst core. From Hubble Space Telescope archive images, we find that it is elliptical with an effe…
Updating reionization scenarios after recent data
Ferrara, A.; Choudhury, T. Roy
The recent release of data on (i) high-redshift source counts from the Near Infrared Camera and Multi-Object Spectrometer (NICMOS) Hubble Ultra Deep Field (HUDF) and (ii) electron scattering optical depth from the Wilkinson Microwave Anisotropy Probe (WMAP) requires a re-examination of reionization scenarios. Using an improved self-consistent reio…
On the origin and excitation of the extended nebula surrounding NGC1275
Fabian, A. C.; Johnstone, R. M.; Crawford, C. S. +1 more
We use line-of-sight velocity information on the filamentary emission-line nebula of NGC1275 to infer a dynamical model of the nebula's flow through the surrounding intracluster gas. We detect outflowing gas and flow patterns that match simulations of buoyantly rising bubbles from which we deduce that some of the nebula filaments have been drawn o…