Search Publications
GOODS-Herschel: an infrared main sequence for star-forming galaxies
Magnelli, B.; Lutz, D.; Altieri, B. +52 more
We present the deepest 100 to 500 µm far-infrared observations obtained with the Herschel Space Observatory as part of the GOODS-Herschel key program, and examine the infrared (IR) 3-500 µm spectral energy distributions (SEDs) of galaxies at 0 < z < 2.5, supplemented by a local reference sample from IRAS, ISO, Spitzer, and AKARI …
The global dust SED: tracing the nature and evolution of dust with DustEM
Boulanger, F.; Bernard, J. -P.; Le Bourlot, J. +6 more
The Planck and Herschel missions are currently measuring the far-infrared to millimeter emission of dust, which combined with existing IR data, will for the first time provide the full spectral energy distribution (SED) of the galactic interstellar medium dust emission, from the mid-IR to the mm range, with an unprecedented sensitivity and down to…
Building the cosmic infrared background brick by brick with Herschel/PEP
Berta, S.; Magnelli, B.; Nordon, R. +24 more
The cosmic infrared background (CIB) includes roughly half of the energy radiated by all galaxies at all wavelengths across cosmic time, as observed at the present epoch. The PACS Evolutionary Probe (PEP) survey is exploited here to study the CIB and its redshift differential, at 70, 100 and 160 µm, where the background peaks. Combining PACS…
MESS (Mass-loss of Evolved StarS), a Herschel key program
Ivison, R. J.; Blommaert, J. A. D. L.; Olofsson, G. +39 more
MESS (Mass-loss of Evolved StarS) is a guaranteed time key program that uses the PACS and SPIRE instruments on board the Herschel space observatory to observe a representative sample of evolved stars, that include asymptotic giant branch (AGB) and post-AGB stars, planetary nebulae and red supergiants, as well as luminous blue variables, Wolf-Rayet…
Sulfur depletion in dense clouds and circumstellar regions. I. H2S ice abundance and UV-photochemical reactions in the H2O-matrix
Muñoz Caro, G. M.; Jiménez-Escobar, A.
Aims: This work aims to study the unexplained sulfur depletion observed toward dense clouds and protostars.
Methods: We made simulation experiments of the UV-photoprocessing and sublimation of H2S and H2S:H2O ice in dense clouds and circumstellar regions, using the InterStellar Astrochemistry Chamber (ISA…
The complex circumstellar environment of HD 142527
Waters, L. B. F. M.; Pantin, E.; Dominik, C. +10 more
Context. The recent findings of gas giant planets around young A-type stars suggest that disks surrounding Herbig Ae/Be stars will develop planetary systems. An interesting case is HD 142527, for which previous observations revealed a complex circumstellar environment and an unusually high ratio of infrared to stellar luminosity. Its properties di…
Planck early results. XVI. The Planck view of nearby galaxies
Kneissl, R.; Miville-Deschênes, M. -A.; Bernard, J. -P. +192 more
The all-sky coverage of the Planck Early Release Compact Source Catalogue (ERCSC) provides an unsurpassed survey of galaxies at submillimetre (submm) wavelengths, representing a major improvement in the numbers of galaxies detected, as well as the range of far-IR/submm wavelengths over which they have been observed. We here present the first resul…
The close circumstellar environment of Betelgeuse. II. Diffraction-limited spectro-imaging from 7.76 to 19.50 µm with VLT/VISIR
Kervella, P.; Chiavassa, A.; Verhoelst, T. +4 more
Context. Mass-loss occurring in red supergiants (RSGs) is a major contributor to the enrichment of the interstellar medium in dust and molecules. The physical mechanism of this mass loss is however relatively poorly known. Betelgeuse is the nearest RSG, and as such a prime object for high angular resolution observations of its surface (by interfer…
The optically bright post-AGB population of the LMC
Wood, P. R.; van Winckel, H.; Lloyd Evans, T. +3 more
Context. The detected variety in chemistry and circumstellar shell morphology of the limited sample of Galactic post-asymptotic giant branch (AGB) stars is so large that there is no consensus yet on how the different objects are linked by evolutionary channels. The evaluation is complicated by the fact that their distances and hence luminosities r…
Constraining the structure of the planet-forming region in the disk of the Herbig Be star HD 100546
Pinte, C.; Ménard, F.; Weigelt, G. +8 more
Context. Studying the physical conditions in circumstellar disks is a crucial step toward understanding planet formation and disk evolution. Of particular interest is the case of HD 100546, a Herbig Be star that presents a gap within the first 13 AU of its protoplanetary disk, a gap that may originate in the dynamical interactions of a forming pla…