Search Publications
High-resolution CO and radio imaging of ULIRGs: extended CO structures and implications for the universal star formation law
Beswick, R.; Genzel, R.; Ivison, R. J. +14 more
We present high spatial resolution (0.4 arcsec, kpc) Plateau de Bure Interferometer interferometric data on three ultraluminous infrared galaxies (ULIRGs) at : two submillimetre galaxies (SMGs) and one submillimetre faint star-forming radio galaxy. The three galaxies have been robustly detected in CO rotational transitions, either 12CO …
Chandra observation of two shock fronts in the merging galaxy cluster Abell 2146
Fabian, A. C.; McNamara, B. R.; Russell, H. R. +5 more
We present a new Chandra observation of the galaxy cluster Abell 2146 which has revealed a complex merging system with a gas structure that is remarkably similar to the Bullet cluster. The X-ray image and temperature map show a cool 2 -3 keV subcluster with a ram pressure stripped tail of gas just exiting the disrupted 6 - 7 keV primary cluster. F…
On the stellar masses of IRAC detected Lyman Break Galaxies at z ~ 3
Magdis, G. E.; Rigopoulou, D.; Fazio, G. G. +1 more
We present results of a large survey of the mid-infrared (mid-IR) properties of 248 Lyman Break Galaxies (LBGs) with confirmed spectroscopic redshift using deep Spitzer/Infrared Array Camera (IRAC) observations in six cosmological fields. By combining the new mid-IR photometry with optical and near-infrared observations, we model the spectral ener…
Abell 370 revisited: refurbished Hubble imaging of the first strong lensing cluster
Kneib, J. -P.; Jullo, E.; Richard, J. +2 more
We present a strong lensing analysis of the galaxy cluster Abell 370 (z= 0.375) based on the recent multicolour images by Advanced Camera for Surveys obtained as part of the Early Release Observation (ERO) that followed the Hubble Service Mission #4. Back in 1987, the giant gravitational arc (z= 0.725) in Abell 370 was one of the first pieces of e…
High-redshift elliptical galaxies: are they (all) really compact?
Aussel, H.; Cimatti, A.; Daddi, E. +10 more
We investigate the properties of 12 ultramassive passively evolving early-type galaxies (ETGs) at zphot > 1.4 in the COSMOS 2 deg2 field. These 12 ETGs were selected as pBzKs, have accurate 1.4 <~ zphot <~ 1.7, high Sérsic index profiles typical of ellipticals, no detection at 24µm, resulting in a co…
HerMES: deep galaxy number counts from a P(D) fluctuation analysis of SPIRE Science Demonstration Phase observations
Altieri, B.; Aussel, H.; Elbaz, D. +71 more
Dusty, star-forming galaxies contribute to a bright, currently unresolved cosmic far-infrared background. Deep Herschel-Spectral and Photometric Imaging Receiver (SPIRE) images designed to detect and characterize the galaxies that comprise this background are highly confused, such that the bulk lies below the classical confusion limit. We analyse …
Super star clusters in Haro 11: properties of a very young starburst and evidence for a near-infrared flux excess
Östlin, G.; Hayes, M.; Adamo, A. +3 more
We have used multiband imaging to investigate the nature of an extreme starburst environment in the nearby Lyman break galaxy analogue Haro 11 (ESO350-IG038) by means of its stellar cluster population. The central starburst region has been observed in eight different high-resolution Hubble Space Telescope (HST) wavebands, sampling the stellar and …
Low-velocity streams in the solar neighbourhood caused by the Galactic bar
Siebert, A.; Minchev, I.; Bienayme, O. +1 more
We find that a steady-state bar induces transient features at low velocities in the solar neighbourhood velocity distribution due to the initial response of the disc, following the formation of the bar. We associate these velocity streams with two quasi-periodic orbital families, librating around the stable x1(1) and x1(2) or…
X-ray groups and clusters of galaxies in the Subaru-XMM Deep Field
Finoguenov, A.; Smolčić, V.; McLure, R. J. +20 more
We present the results of a search for galaxy clusters in the Subaru-XMM Deep Field (SXDF). We reach a depth for a total cluster flux in the 0.5-2 keV band of 2 × 10-15 erg cm-2 s-1 over one of the widest XMM-Newton contiguous raster surveys, covering an area of 1.3deg2. Cluster candidates are identified…
The spectral energy distribution of the central parsecs of the nearest AGN
Meisenheimer, K.; Tristram, K. R. W.; Prieto, M. A. +4 more
Spectral energy distributions (SEDs) of the central few tens of parsec region of some of the nearest, most well-studied, active galactic nuclei (AGN) are presented. These genuine AGN-core SEDs, mostly from Seyfert galaxies, are characterized by two main features: an infrared (IR) bump with the maximum in the 2-10µm range and an increasing X-…