Search Publications
Herschel observations of the Sagittarius B2 cores: Hydrides, warm CO, and cold dust
Wu, R.; Bally, J.; Cernicharo, J. +6 more
Context. Sagittarius B2 is one of the most massive and luminous star-forming regions in the Galaxy and shows a very rich chemistry and physical conditions similar to those in much more distant extragalactic starbursts.
Aims: We present large-scale far-infrared/submillimeter photometric images and broadband spectroscopic maps taken with the PA…
Planck intermediate results. VII. Statistical properties of infrared and radio extragalactic sources from the Planck Early Release Compact Source Catalogue at frequencies between 100 and 857 GHz
Kneissl, R.; Bernard, J. -P.; Planck Collaboration +188 more
We make use of the Planck all-sky survey to derive number counts and spectral indices of extragalactic sources - infrared and radio sources - from the Planck Early Release Compact Source Catalogue (ERCSC) at 100 to 857 GHz (3 mm to 350 µm). Three zones (deep, medium and shallow) of approximately homogeneous coverage are used to permit a clea…
Chemical enrichment and physical conditions in I Zw 18
Kunth, D.; Lebouteiller, V.; Hubeny, I. +1 more
Context. Low-metallicity star-forming dwarf galaxies are prime targets to understand the chemical enrichment of the interstellar medium. The H i region contains the bulk of the mass in blue compact dwarfs, and it provides important constraints on the dispersal and mixing of heavy elements released by successive star-formation episodes. The metalli…
CLASH-VLT: spectroscopic confirmation of a z = 6.11 quintuply lensed galaxy in the Frontier Fields cluster RXC J2248.7-4431
Infante, L.; Zheng, W.; Molino, A. +41 more
We present VIsible Multi-Object Spectrograph (VIMOS) observations of a galaxy quintuply imaged by the Frontier Fields galaxy cluster RXC J2248.7-4431 . This sub-, high- galaxy has been recently discovered by Monna et al. (2013) using dropout techniques with the 16-band HST photometry acquired as part of the Cluster Lensing And Supernova survey wit…
Planet or brown dwarf? Inferring the companion mass in HD 100546 from the wall shape using mid-infrared interferometry
van Boekel, Roy; Panić, Olja; Mulders, Gijs D. +3 more
Context. Giant planets form in protoplanetary disks while these disks are still gas-rich, and can reveal their presence through the annular gaps they carve out. HD 100546 is a gas-rich disk with a wide gap between a radius of ~1 and 13 AU, possibly cleared out by a planetary companion or planetary system.
Aims: We aim to identify the nature o…
Observationally driven 3D magnetohydrodynamics model of the solar corona above an active region
Peter, H.; Bingert, S.; Bourdin, Ph. -A.
Context.
Aims: The goal is to employ a 3D magnetohydrodynamics (MHD) model including spectral synthesis to model the corona in an observed solar active region. This will allow us to judge the merits of the coronal heating mechanism built into the 3D model.
Methods: Photospheric observations of the magnetic field and horizontal velocities…
An in-depth study of HD 174966 with CoRoT photometry and HARPS spectroscopy. Large separation as a new observable for δ Scuti stars
Auvergne, M.; Amado, P. J.; Baudin, F. +18 more
Aims: The aim of this work was to use a multi-approach technique to derive the most accurate values possible of the physical parameters of the δ Sct star HD 174966, which was observed with the CoRoT satellite. In addition, we searched for a periodic pattern in the frequency spectra with the goal of using it to determine the mean density of th…
The degeneracy between dust colour temperature and spectral index. Comparison of methods for estimating the β(T) relation
Juvela, M.; Ysard, N.; Montillaud, J. +1 more
Context. Submillimetre dust emission provides information on the physics of interstellar clouds and dust. However, noise can produce a spurious anticorrelation between the colour temperature TC and the spectral index β. These artefacts must be separated from the intrinsic β(T) relation of dust emission.
Aims: We compare methods tha…
Herschel far-infrared observations of the Carina Nebula complex. III. Detailed cloud structure and feedback effects
Preibisch, T.; Roccatagliata, V.; Gaczkowski, B. +1 more
Context. The star formation process in large clusters/associations can be strongly influenced by the feedback from high-mass stars. Whether the resulting net effect of the feedback is predominantly negative (cloud dispersal) or positive (triggering of star formation due to cloud compression) is still an open question.
Aims: The Carina Nebula …
Physical properties of high-mass clumps in different stages of evolution
Molinari, S.; Giannetti, A.; Beltrán, M. T. +6 more
Context. The details of the process of massive star formation are still elusive. A complete characterization of the first stages of the process from an observational point of view is needed to constrain theories on the subject. In the past 20 years we have made a thorough investigation of colour-selected IRAS sources over the whole sky. The source…