Search Publications
Comprehensive comparison of models for spectral energy distributions from 0.1 µm to 1 mm of nearby star-forming galaxies
Helou, G.; Ciesla, L.; Boquien, M. +26 more
We have fit the far-ultraviolet (FUV) to sub-millimeter (850 µm) spectral energy distributions (SEDs) of the 61 galaxies from the Key Insights on Nearby Galaxies: A Far-Infrared Survey with Herschel (KINGFISH). The fitting has been performed using three models: the Code for Investigating GALaxy Evolution (CIGALE), the GRAphite-SILicate appro…
ALMA survey of Class II protoplanetary disks in Corona Australis: a young region with low disk masses
Tamura, M.; Galván-Madrid, R.; Testi, L. +20 more
Context. In recent years, the disk populations in a number of young star-forming regions have been surveyed with the Atacama Large Millimeter/submillimeter Array (ALMA). Understanding the disk properties and their correlation with the properties of the central star is critical to understanding planet formation. In particular, a decrease of the ave…
Gas phase Elemental abundances in Molecular cloudS (GEMS). I. The prototypical dark cloud TMC 1
Roueff, E.; Kirk, J.; Ward-Thompson, D. +30 more
GEMS is an IRAM 30 m Large Program whose aim is determining the elemental depletions and the ionization fraction in a set of prototypical star-forming regions. This paper presents the first results from the prototypical dark cloud Taurus molecular cloud (TMC) 1. Extensive millimeter observations have been carried out with the IRAM 30 m telescope (…
Climate of an ultra hot Jupiter. Spectroscopic phase curve of WASP-18b with HST/WFC3
Fortney, Jonathan J.; Stevenson, Kevin B.; Désert, Jean-Michel +6 more
We present the analysis of a full-orbit, spectroscopic phase curve of the ultra hot Jupiter (UHJ) WASP-18b, obtained with the Wide Field Camera 3 aboard the Hubble Space Telescope. We measured the normalised day-night contrast of the planet as >0.96 in luminosity: the disc-integrated dayside emission from the planet is at 964 ± 25 ppm, correspo…
The X-ray properties of z > 6 quasars: no evident evolution of accretion physics in the first Gyr of the Universe
Bauer, F. E.; Brandt, W. N.; Vignali, C. +10 more
Context. X-ray emission from quasars (QSOs) has been used to assess supermassive black hole accretion properties up to z ≈ 6. However, at z > 6 only ≈15 QSOs are covered by sensitive X-ray observations, preventing a statistically significant investigation of the X-ray properties of the QSO population in the first Gyr of the Universe.
Aims:…
Expanding associations in the Vela-Puppis region. 3D structure and kinematics of the young population
Jordi, C.; Cantat-Gaudin, T.; Balaguer-Núñez, L. +9 more
Context. The Vela-Puppis region is known to host the Vela OB2 association as well as several young clusters featuring OB and pre-main-sequence stars. Several spatial and kinematic subgroups have been identified in recent years.
Aims: By grouping stars based on their positions and velocity, we can address the question of the dynamical history …
Extended stellar systems in the solar neighborhood . II. Discovery of a nearby 120° stellar stream in Gaia DR2
Meingast, Stefan; Alves, João; Fürnkranz, Verena
We report the discovery of a large, dynamically cold, coeval stellar stream that is currently traversing the immediate solar neighborhood at a distance of only 100 pc. The structure was identified in a wavelet decomposition of the 3D velocity space of all stars within 300 pc of the Sun. Its members form a highly elongated structure with a length o…
Long-term monitoring of the outgassing and composition of comet 67P/Churyumov-Gerasimenko with the Rosetta/MIRO instrument
Hartogh, P.; Lellouch, E.; Crovisier, J. +14 more
We present the analysis of ≈100 molecular maps of the coma of comet 67P/Churyumov-Gerasimenko that were obtained with the MIRO submillimeter radiotelescope on board the Rosetta spacecraft. From the spectral line mapping of H216O, H218O, H217O, CH3OH, NH3, and C…
The 3HSP catalogue of extreme and high-synchrotron peaked blazars
Giommi, P.; Padovani, P.; Chang, Y. -L. +2 more
Aims: High-synchrotron peaked blazars (HSPs or HBLs) play a central role in very high-energy (VHE) γ-ray astronomy, and likely in neutrino astronomy. Currently, the largest compilation of HSP blazars, the 2WHSP sample, includes 1691 sources, but it is not complete in the radio or in the X-ray band. In order to provide a larger and more accura…
SIXTE: a generic X-ray instrument simulation toolkit
Wilms, Jörn; Dauser, Thomas; Falkner, Sebastian +8 more
We give an overview of the SImulation of X-ray TElescopes (SIXTE) software package, a generic, mission-independent Monte Carlo simulation toolkit for X-ray astronomical instrumentation. The package is based on a modular approach for the source definition, the description of the optics, and the detector type such that new missions can be easily imp…