Search Publications
The 12CO/13CO isotopologue ratio of a young, isolated brown dwarf. Possibly distinct formation pathways of super-Jupiters and brown dwarfs
Zhang, Yapeng; Mollière, Paul; Snellen, Ignas A. G.
Context. Linking atmospheric characteristics of planets to their formation pathways is a central theme in the study of extrasolar planets. Although the 12C/13C isotope ratio shows little variation in the Solar System, the atmosphere of a super-Jupiter was recently shown to be rich in 13CO, possibly as a result of d…
The Galactic center chimneys: the base of the multiphase outflow of the Milky Way
Churazov, E.; Ponti, G.; Heywood, I. +2 more
Context. Outflows and feedback are key ingredients of galaxy evolution. Evidence for an outflow arising from the Galactic center (GC) - the so-called GC chimneys - has recently been discovered at radio, infrared, and X-ray bands.
Aims: We undertake a detailed examination of the spatial relationships between the emission in the different bands…
Iron in X-COP: Tracing enrichment in cluster outskirts with high accuracy abundance profiles
Gastaldello, Fabio; Ettori, Stefano; Bartalucci, Iacopo +11 more
We present the first metal abundance profiles for a representative sample of massive clusters. Our measurements extend to R500 and are corrected for a systematic error plaguing previous outskirt estimates. Our profiles flatten out at large radii, admittedly not a new result, however the radial range and representative nature of our samp…
Implementation of disequilibrium chemistry to spectral retrieval code ARCiS and application to 16 exoplanet transmission spectra. Indication of disequilibrium chemistry for HD 209458b and WASP-39b
Min, Michiel; Kawashima, Yui
Context. The retrieval approach is currently a standard method for deriving atmospheric properties from observed spectra of exoplanets. However, the approach ignores disequilibrium chemistry in most current retrieval codes, which can lead to a misinterpretation of the metallicity or elemental abundance ratios of the atmosphere.
Aims: We have …
Physical properties of the ambient medium and of dense cores in the Perseus star-forming region derived from Herschel Gould Belt Survey observations
André, Ph.; Arzoumanian, D.; Könyves, V. +20 more
The complex of star-forming regions in Perseus is one of the most studied due to its proximity (about 300 pc). In addition, its regions show variation in star-formation activity and age, with formation of low-mass and intermediate-mass stars. In this paper, we present analyses of images taken with the Herschel ESA satellite from 70 µm to 500…
CLASH-VLT: Abell S1063. Cluster assembly history and spectroscopic catalogue
Rodighiero, G.; Demarco, R.; Gruen, D. +31 more
Context. The processes responsible for galaxy evolution in different environments as a function of galaxy mass remain heavily debated. Rich galaxy clusters are ideal laboratories in which to distinguish the role of environmental versus mass quenching because they consist of a full range of galaxies and environments.
Aims: Using the CLASH-VLT …
A major asymmetric ice trap in a planet-forming disk. II. Prominent SO and SO2 pointing to C/O < 1
Booth, Alice S.; van Dishoeck, Ewine F.; Leemker, Margot +2 more
Gas-phase sulphur-bearing volatiles appear to be severely depleted in protoplanetary disks. The detection of CS and the non-detections of SO and SO2 in many disks have shown that the gas in the warm molecular layer, where giant planets accrete their atmospheres, has a high C/O ratio. In this Letter, we report the detection of SO and SO<…
Chamaeleon DANCe. Revisiting the stellar populations of Chamaeleon I and Chamaeleon II with Gaia-DR2 data
Bertin, E.; Miret-Roig, N.; Bouy, H. +6 more
Context. Chamaeleon is the southernmost low-mass star-forming complex within 200 pc from the Sun. Its stellar population has been extensively studied in the past, but the current census of the stellar content is not complete yet and deserves further investigation.
Aims: We take advantage of the second data release of the Gaia space mission to…
An ultra-short-period transiting super-Earth orbiting the M3 dwarf TOI-1685
Tamura, M.; Amado, P. J.; Caballero, J. A. +51 more
Dynamical histories of planetary systems, as well as the atmospheric evolution of highly irradiated planets, can be studied by characterizing the ultra-short-period planet population, which the TESS mission is particularly well suited to discover. Here, we report on the follow-up of a transit signal detected in the TESS sector 19 photometric time …
ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT). V. Sample, overview, and demography of disk molecular emission
Podio, L.; Bacciotti, F.; Fedele, D. +9 more
We present an overview of the ALMA chemical survey of disk-outflow sources in Taurus (ALMA-DOT), a campaign devoted to the characterization of the molecular emission from partly embedded young stars. The project is aimed at attaining a better understanding of the gaseous products delivered to planets by means of high-resolution maps of the assorte…