Search Publications
Herschel and SCUBA-2 imaging and spectroscopy of a bright, lensed submillimetre galaxy at z = 2.3
Smail, I.; Valtchanov, I.; Ivison, R. J. +32 more
We present a detailed analysis of the far-infrared (-IR) properties of the bright, lensed, z = 2.3, submillimetre-selected galaxy (SMG), SMM J2135-0102 (hereafter SMM J2135), using new observations with Herschel, SCUBA-2 and the Very Large Array (VLA). These data allow us to constrain the galaxy's spectral energy distribution (SED) and show that i…
Herschel unveils a puzzling uniformity of distant dusty galaxies
Berta, S.; Magnelli, B.; Nordon, R. +106 more
The Herschel Space Observatory enables us to accurately measure the bolometric output of starburst galaxies and active galactic nuclei (AGN) by directly sampling the peak of their far-infrared (IR) emission. Here we examine whether the spectral energy distribution (SED) and dust temperature of galaxies have strongly evolved over the last 80% of th…
On the physical properties of z ≈ 6-8 galaxies
Schaerer, D.; de Barros, S.
Aims: We analyse the spectral energy distributions (SEDs) of the most distant galaxies discovered with the Hubble Space telescope and from the COSMOS survey and determine their physical properties, such as stellar age and mass, dust attenuation, and star-formation rate.
Methods: We use our SED fitting tool including the effects of nebula…
Accretion dynamics and disk evolution in NGC 2264: a study based on CoRoT photometric observations
Aigrain, S.; Bouvier, J.; Teixeira, P. S. +6 more
Context. The young cluster NGC 2264 was observed with the CoRoT satellite for 23 days uninterruptedly in March 2008 with unprecedented photometric accuracy. We present the first results of our analysis of the accreting population belonging to the cluster as observed by CoRoT.
Aims: We search for possible light curve variability of the same na…
A Herschel PACS and SPIRE study of the dust content of the Cassiopeia A supernova remnant
Ivison, R. J.; Olofsson, G.; Henning, Th. +13 more
Using the 3.5-m Herschel Space Observatory, imaging photometry of Cas A has been obtained in six bands between 70 and 500 µm with the PACS and SPIRE instruments, with angular resolutions ranging from 6 to 37”. In the outer regions of the remnant the 70-µm PACS image resembles the 24-µm image Spitzer image, with the emission attri…
The Palermo Swift-BAT hard X-ray catalogue. III. Results after 54 months of sky survey
Tagliaferri, G.; Cusumano, G.; Sbarufatti, B. +10 more
Aims: We present the Second Palermo Swift-BAT hard X-ray catalogue obtained by analysing data acquired in the first 54 months of the Swift mission.
Methods: Using our software dedicated to the analysis of data from coded mask telescopes, we analysed the BAT survey data in three energy bands (15-30 keV, 15-70 keV, 15-150 keV), obtaining a…
Deep imaging survey of young, nearby austral stars . VLT/NACO near-infrared Lyot-coronographic observations
Zuckerman, B.; Lagrange, A. -M.; Desidera, S. +10 more
Context. High contrast and high angular resolution imaging is the optimal search technique for substellar companions to nearby stars at physical separations larger than typically 10 AU. Two distinct populations of substellar companions, brown dwarfs and planets, can be probed and characterized. As a result, fossile traces of processes of formation…
The halos of satellite galaxies: the companion of the massive elliptical lens SL2S J08544-0121
Halkola, A.; Suyu, S. H.
Strong gravitational lensing by groups or clusters of galaxies provides a powerful technique to measure the dark matter properties of individual lens galaxies. We study in detail the mass distribution of the satellite lens galaxy in the group-scale lens SL2S J08544-0121 by modelling simultaneously the spatially extended surface brightness distribu…
Oscillating red giants in the CoRoT exofield: asteroseismic mass and radius determination
Deleuil, M.; Goupil, M. -J.; Baudin, F. +10 more
Context. Observations and analysis of solar-type oscillations in red-giant stars is an emerging aspect of asteroseismic analysis with a number of open questions yet to be explored. Although stochastic oscillations have previously been detected in red giants from both radial velocity and photometric measurements, those data were either too short or…
Star formation in AGN hosts in GOODS-N
Berta, S.; Magnelli, B.; Nordon, R. +40 more
Sensitive Herschel far-infrared observations can break degeneracies that were inherent to previous studies of star formation in high-z AGN hosts. Combining PACS 100 and 160 µm observations of the GOODS-N field with 2 Ms Chandra data, we detect 20% of X-ray AGN individually at >3σ. The host far-infrared luminosity of AGN with L2-10 ke…