Search Publications
Star formation in the local Universe from the CALIFA sample. I. Calibrating the SFR using integral field spectroscopy data
Bomans, D. J.; Galbany, L.; Kennicutt, R. C. +24 more
Context. The star formation rate (SFR) is one of the main parameters used to analyze the evolution of galaxies through time. The need for recovering the light reprocessed by dust commonly requires the use of low spatial resolution far-infrared data. Recombination line luminosities provide an alternative, although uncertain dust-extinction correcti…
Hierarchical progressive surveys. Multi-resolution HEALPix data structures for astronomical images, catalogues, and 3-dimensional data cubes
Boch, T.; Fernique, P.; Pineau, F. -X. +8 more
Context. Scientific exploitation of the ever increasing volumes of astronomical data requires efficient and practical methods for data access, visualisation, and analysis. Hierarchical sky tessellation techniques enable a multi-resolution approach to organising data on angular scales from the full sky down to the individual image pixels.
Aims…
Mixed aliphatic and aromatic composition of evaporating very small grains in NGC 7023 revealed by the 3.4/3.3 µm ratio
Boulanger, F.; Joblin, C.; Onaka, T. +1 more
Context. A chemical scenario was proposed for photon-dominated regions (PDRs) according to which UV photons from nearby stars lead to the evaporation of very small grains (VSGs) and the production of gas-phase polycyclic aromatic hydrocarbons (PAHs).
Aims: Our goal is to achieve better insight into the composition and evolution of evaporating…
A near-infrared spectroscopic survey of massive jets towards extended green objects
Sanna, A.; Stecklum, B.; Linz, H. +2 more
Context. Protostellar jets and outflows are the main outcome of the star formation process, and their analysis can provide us with major clues about the ejection and accretion history of young stellar objects (YSOs).
Aims: We aim at deriving the main physical properties of massive jets from near-infrared (NIR) observations, comparing them to …
Galactic cold cores. VI. Dust opacity spectral index
Juvela, M.; Marshall, D. J.; Paladini, R. +13 more
Context. The Galactic Cold Cores project has carried out Herschel photometric observations of 116 fields where the Planck survey has found signs of cold dust emission. The fields contain sources in different environments and different phases of star formation. Previous studies have revealed variations in their dust submillimetre opacity.
Aims…
Galactic cold cores. IV. Cold submillimetre sources: catalogue and statistical analysis
Bernard, J. -P.; Falgarone, E.; Juvela, M. +17 more
Context. For the project Galactic cold cores, Herschel photometric observations were carried out as a follow-up of cold regions of interstellar clouds previously identified with the Planck satellite. The aim of the project is to derive the physical properties of the population of cold sources and to study its connection to ongoing and future star …
Multitechnique testing of the viscous decretion disk model. I. The stable and tenuous disk of the late-type Be star β CMi
Carciofi, A. C.; Rivinius, Th.; Štefl, S. +10 more
Context. The viscous decretion disk (VDD) model is able to explain most of the currently observable properties of the circumstellar disks of Be stars. However, more stringent tests, focusing on reproducing multitechnique observations of individual targets via physical modeling, are needed to study the predictions of the VDD model under specific ci…
The evolved circumbinary disk of AC Herculis: a radiative transfer, interferometric, and mineralogical study
Min, M.; de Vries, B. L.; Van Winckel, H. +3 more
Context. Many post-asymptotic giant branch (post-AGB) stars in binary systems have an infrared (IR) excess arising from a dusty circumbinary disk. The disk formation, current structure, and further evolution are, however, poorly understood.
Aims: We aim to constrain the structure of the circumstellar material around the post-AGB binary and RV…
Dust attenuation up to z ≃ 2 in the AKARI North Ecliptic Pole Deep Field
Ciesla, L.; Buat, V.; Burgarella, D. +13 more
Aims: We aim to study the evolution of dust attenuation in galaxies selected in the infrared (IR) in the redshift range in which they are known to dominate the star formation activity in the universe. The comparison with other measurements of dust attenuation in samples selected using different criteria will give us a global picture of the at…
New constraints on the dust surrounding HR 4796A
Pinte, C.; Augereau, J. -C.; Mawet, D. +7 more
Context. HR 4796A is surrounded by a well-structured and very bright circumstellar disc shaped like an annulus with many interesting features: very sharp inner and outer edges, brightness asymmetries, centre offset, and suspected distortions in the ring.
Aims: We aim to constrain the properties of the dust surrounding the star HR 4796A, in pa…