Search Publications
Three-dimensional mapping of the local interstellar medium with composite data
Monreal-Ibero, A.; Elyajouri, M.; Lallement, R. +2 more
Context. Three-dimensional maps of the Galactic interstellar medium are general astrophysical tools. Reddening maps may be based on the inversion of color excess measurements for individual target stars or on statistical methods using stellar surveys. Three-dimensional maps based on diffuse interstellar bands (DIBs) have also been produced. All me…
ALMA unveils rings and gaps in the protoplanetary system HD 169142 : signatures of two giant protoplanets
Fedele, D.; Henning, Th.; Miotello, A. +6 more
The protoplanetary system HD 169142 is one of the few cases where a potential candidate protoplanet has recently been detected by direct imaging in the near-infrared. To study the interaction between the protoplanet and the disk itself, observations of the gas and dust surface density structure are needed. This paper reports new ALMA observations …
The third data release of the Kilo-Degree Survey and associated data products
Hoekstra, Henk; Gwyn, Stephen D. J.; Heymans, Catherine +41 more
Context. The Kilo-Degree Survey (KiDS) is an ongoing optical wide-field imaging survey with the OmegaCAM camera at the VLT Survey Telescope. It aims to image 1500 square degrees in four filters (ugri). The core science driver is mapping the large-scale matter distribution in the Universe, using weak lensing shear and photometric redshift measureme…
Discovery of a warm, dusty giant planet around HIP 65426
Moutou, C.; Rouan, D.; Augereau, J. -C. +120 more
Aims: The SHINE program is a high-contrast near-infrared survey of 600 young, nearby stars aimed at searching for and characterizing new planetary systems using VLT/SPHERE's unprecedented high-contrast and high-angular-resolution imaging capabilities. It is also intended to place statistical constraints on the rate, mass and orbital distribut…
The anatomy of the Orion B giant molecular cloud: A local template for studies of nearby galaxies
Pety, Jérôme; Guzmán, Viviana V.; Öberg, Karin I. +11 more
Context. Molecular lines and line ratios are commonly used to infer properties of extra-galactic star forming regions. The new generation of millimeter receivers almost turns every observation into a line survey. Full exploitation of this technical advancement in extra-galactic study requires detailed bench-marking of available line diagnostics. <…
The binarity of the local white dwarf population
Gänsicke, B. T.; Toonen, S.; Hollands, M. +1 more
Context. As endpoints of stellar evolution, white dwarfs (WDs) are powerful tools to study the evolutionary history of the Galaxy. In particular, the multiplicity of WDs contains information regarding the formation and evolution of binary systems.
Aims: Can we understand the multiplicity of the local WD sample from a theoretical point of view…
X-shooter study of accretion in Chamaeleon I. II. A steeper increase of accretion with stellar mass for very low-mass stars?
Prusti, T.; Henning, T.; Pascucci, I. +10 more
The dependence of the mass accretion rate on the stellar properties is a key constraint for star formation and disk evolution studies. Here we present a study of a sample of stars in the Chamaeleon I star-forming region carried out using spectra taken with the ESO VLT/X-shooter spectrograph. The sample is nearly complete down to stellar masses (M<…
Structure of Herbig AeBe disks at the milliarcsecond scale . A statistical survey in the H band using PIONIER-VLTI
Pinte, C.; Ménard, F.; Absil, O. +26 more
Context. It is now generally accepted that the near-infrared excess of Herbig AeBe stars originates in the dust of a circumstellar disk.
Aims: The aims of this article are to infer the radial and vertical structure of these disks at scales of order 1 au, and the properties of the dust grains.
Methods: The program objects (51 in total) we…
A box full of chocolates: The rich structure of the nearby stellar halo revealed by Gaia and RAVE
Tian, Hao; Helmi, Amina; Sales, Laura V. +2 more
Context. The hierarchical structure formation model predicts that stellar halos should form, at least partly, via mergers. If this was a predominant formation channel for the Milky Way's halo, imprints of this merger history in the form of moving groups or streams should also exist in the vicinity of the Sun.
Aims: We study the kinematics of …
Gaia Data Release 1. Catalogue validation
Jordi, C.; Luri, X.; Cantat-Gaudin, T. +42 more
Context. Before the publication of the Gaia Catalogue, the contents of the first data release have undergone multiple dedicated validation tests.
Aims: These tests aim to provide in-depth analysis of the Catalogue content in order to detect anomalies and individual problems in specific objects or in overall statistical properties, and either …