Search Publications
Overview and stellar statistics of the expected Gaia Catalogue using the Gaia Object Generator
Jordi, C.; Luri, X.; Arenou, F. +13 more
Aims: An effort has been made to simulate the expected Gaia Catalogue, including the effect of observational errors. We statistically analyse this simulated Gaia data to better understand what can be obtained from the Gaia astrometric mission. This catalogue is used to investigate the potential yield in astrometric, photometric, and spectrosc…
Galaxy population properties of the massive X-ray luminous galaxy cluster XDCP J0044.0-2033 at z = 1.58. Red-sequence formation, massive galaxy assembly, and central star formation activity
Lidman, C.; Castellano, M.; Pentericci, L. +20 more
Context. Recent observational progress has enabled the detection of galaxy clusters and groups out to very high redshifts and for the first time allows detailed studies of galaxy population properties in these densest environments in what was formerly known as the "redshift desert" at z> 1.5.
Aims: We aim to investigate various galaxy popu…
Diversity of chemistry and excitation conditions in the high-mass star forming complex W33
Immer, K.; Galván-Madrid, R.; König, C. +2 more
The object W33 is a giant molecular cloud that contains star forming regions at various evolutionary stages from quiescent clumps to developed H ii regions. Since its star forming regions are located at the same distance and the primary material of the birth clouds is probably similar, we conducted a comparative chemical study to trace the chemica…
The narrow Fe Kα line and the molecular torus in active galactic nuclei: an IR/X-ray view
Paltani, S.; Gandhi, P.; Stalevski, M. +5 more
The narrow component of the iron Kα is an almost ubiquitous feature in the X-ray spectra of active galactic nuclei (AGN) and is believed to originate in neutral material, possibly located in the molecular torus. This would imply a tight connection between the Fe Kα equivalent width (EW) and the physical properties of the torus. In a recent work we…
Detailed modelling of the circumstellar molecular line emission of the S-type AGB star W Aquilae
Olofsson, H.; Justtanont, K.; Lombaert, R. +5 more
Context. S-type AGB stars have a C/O ratio which suggests that they are transition objects between oxygen-rich M-type stars and carbon-rich C-type stars. As such, their circumstellar compositions of gas and dust are thought to be sensitive to their precise C/O ratio, and it is therefore of particular interest to examine their circumstellar propert…
Probing spatial homogeneity with LTB models: a detailed discussion
Bartelmann, M.; Lewis, G. F.; Meyer, S. +2 more
Do current observational data confirm the assumptions of the cosmological principle, or is there statistical evidence for deviations from spatial homogeneity on large scales? To address these questions, we developed a flexible framework based on spherically symmetric, but radially inhomogeneous Lemaître-Tolman-Bondi (LTB) models with synchronous B…
Mining the gap: evolution of the magnitude gap in X-ray galaxy groups from the 3-square-degree XMM coverage of CFHTLS
Finoguenov, A.; Popesso, P.; Salvato, M. +15 more
We present a catalog of 129 X-ray galaxy groups, covering a redshift range 0.04 <z< 1.23, selected in the ~3 deg2 part of the CFHTLS W1 field overlapping XMM observations performed under the XMM-LSS project. We carry out a statistical study of the redshift evolution out to redshift one of the magnitude gap between the first and th…
Spatially resolved kinematics, galactic wind, and quenching of star formation in the luminous infrared galaxy IRAS F11506-3851
Maiolino, R.; Colina, L.; Arribas, S. +4 more
We present a multi-wavelength integral field spectroscopic (IFS) study of the low-z luminous infrared galaxy IRAS F11506-3851 (ESO 320-G030) on the basis of the moderate spectral resolution observations (R ~ 3400-4000) taken with the VIMOS and SINFONI instruments at the ESO VLT. The morphology and the 2D kinematics of the gaseous (neutral and ioni…
Spatially-resolved dust properties of the GRB 980425 host galaxy
Berta, S.; Le Floc'h, E.; Covino, S. +30 more
Gamma-ray bursts (GRBs) have been proposed as a tool for studying star formation in the Universe, so it is crucial to investigate whether their host galaxies and immediate environments are in any way special compared with other star-forming galaxies. Here we present spatially resolved maps of dust emission of the host galaxyof the closest known GR…
Outflow of hot and cold molecular gas from the obscured secondary nucleus of NGC 3256: closing in on feedback physics
Colina, L.; Villar-Martín, M.; Arribas, S. +5 more
The nuclei of merging galaxies are often deeply buried in dense layers of gas and dust. In these regions, gas outflows driven by starburst and active galactic nuclear activity are believed to play a crucial role in the evolution of these galaxies. However, to fully understand this process it is essential to resolve the morphology and kinematics of…