Search Publications
The galaxy stellar mass function and its evolution with time show no dependence on global environment
Moretti, A.; Vulcani, B.; Halliday, C. +7 more
We present an analysis of the galaxy stellar mass function in different environments at intermediate redshift (0.3 ≤ z ≤ 0.8) for two mass-limited galaxy samples. We use the IMACS Cluster Building Survey (ICBS; M∗ ≥ 1010.5 M⊙) to study cluster, group and field galaxies at z = 0.3-0.45, and the ESO Distant Cluster S…
High-J CO survey of low-mass protostars observed with Herschel-HIFI
van Dishoeck, E. F.; Karska, A.; Fuente, A. +8 more
Context. In the deeply embedded stage of star formation, protostars start to heat and disperse their surrounding cloud cores. The evolution of these sources has traditionally been traced through dust continuum spectral energy distributions (SEDs), but the use of CO excitation as an evolutionary probe has not yet been explored due to the lack of hi…
Obscured AGN at z ~ 1 from the zCOSMOS-Bright Survey. I. Selection and optical properties of a [Ne v]-selected sample
Kneib, J. -P.; Cimatti, A.; Silverman, J. D. +46 more
Aims: The application of multi-wavelength selection techniques is essential for obtaining a complete and unbiased census of active galactic nuclei (AGN). We present here a method for selecting z ~ 1 obscured AGN from optical spectroscopic surveys.
Methods: A sample of 94 narrow-line AGN with 0.65 < z < 1.20 was selected from the 20…
Multiple spiral patterns in the transitional disk of HD 100546
Quanz, S. P.; Augereau, J. -C.; Pantin, E. +3 more
Context. Protoplanetary disks around young stars harbor many structures related to planetary formation. Of particular interest, spiral patterns were discovered among several of these disks and are expected to be the sign of gravitational instabilities leading to giant planet formation or gravitational perturbations caused by already existing plane…
Swift heavy ion irradiation of water ice from MeV to GeV energies. Approaching true cosmic ray compaction
Dartois, E.; Chabot, M.; Brunetto, R. +11 more
Context. Cosmic ray ion irradiation affects the chemical composition of and triggers physical changes in interstellar ice mantles in space. One of the primary structural changes induced is the loss of porosity, and the mantles evolve toward a more compact amorphous state. Previously, ice compaction was monitored at low to moderate ion energies. Th…
The XMM deep survey in the CDF-S. IV. Compton-thick AGN candidates
Elbaz, D.; Fritz, J.; Vignali, C. +15 more
The Chandra Deep Field is the region of the sky with the highest concentration of X-ray data available: 4 Ms of Chandra and 3 Ms of XMM-Newton data, allowing excellent quality spectra to be extracted even for faint sources. We took advantage of this to compile a sample of heavily obscured active galactic nuclei (AGN) using X-ray spectroscopy. We s…
The XMM deep survey in the CDF-S. III. Point source catalogue and number counts in the hard X-rays
Brandt, W. N.; Vignali, C.; Gilli, R. +10 more
Nuclear obscuration plays a key role in the initial phases of AGN growth, yet not many highly obscured active galactic nuclei (AGN) are currently known beyond the local Universe, and their search is an active topic of research. The XMM-Newton survey in the Chandra Deep Field South (XMM-CDFS) aims at detecting and studying the spectral properties o…
Gamma-ray burst optical light-curve zoo: comparison with X-ray observations
Chincarini, G.; Bernardini, M. G.; Margutti, R. +2 more
Aims: We present a comprehensive analysis of the optical and X-ray light curves (LCs) and spectral energy distributions (SEDs) of a large sample of gamma-ray burst (GRB) afterglows to investigate the relationship between the optical and X-ray emission after the prompt phase. We consider all data available in the literature, which where obtain…
Intensity contrast of solar network and faculae
Solanki, S. K.; Yeo, K. L.; Krivova, N. A.
Aims: This study aims at setting observational constraints on the continuum and line core intensity contrast of network and faculae, specifically, their relationship with magnetic field and disc position.
Methods: Full-disc magnetograms and intensity images by the Helioseismic and Magnetic Imager (HMI) onboard the Solar Dynamics Observat…
Infrared identification of high-mass X-ray binaries discovered by INTEGRAL
Chaty, S.; Rahoui, F.; Tomsick, J. A. +2 more
Context. Since it started observing the sky, the INTEGRAL satellite has discovered new categories of high mass X-ray binaries (HMXB) in our Galaxy. These observations raise important questions on the formation and evolution of these rare and short-lived objects.
Aims: We present here new infrared observations from which to reveal or constrain…