Search Publications
TOPoS. VI. The metal-weak tail of the metallicity distribution functions of the Milky Way and the Gaia-Sausage-Enceladus structure
Ludwig, H. -G.; Salvadori, S.; Bonifacio, P. +11 more
Context. The goal of the Turn-Off Primordial Stars survey (TOPoS) project is to find and analyse turn-off (TO) stars of extremely low metallicity. To select the targets for spectroscopic follow-up at high spectral resolution, we relied on low-resolution spectra from the Sloan Digital Sky Survey (SDSS).
Aims: In this paper, we use the metallic…
The interstellar medium of quiescent galaxies and its evolution with time
Daddi, Emanuele; Whitaker, Katherine E.; Toft, Sune +6 more
We characterise the basic far-IR properties and the gas mass fraction of massive (⟨log(M*/M⊙)⟩ ≈ 11.0) quiescent galaxies (QGs) and explore how these evolve from z = 2.0 to the present day. We use robust, multi-wavelength (mid- to far-IR and sub-millimetre to radio) stacking ensembles of homogeneously selected and mass comple…
The young massive SMC cluster NGC 330 seen by MUSE. II. Multiplicity properties of the massive-star population
Wang, C.; de Mink, S. E.; de Koter, A. +10 more
Context. Observations of massive stars in open clusters younger than ∼8 Myr have shown that a majority of them are in binary systems, most of which will interact during their life. While these can be used as a proxy of the initial multiplicity properties, studying populations of massive stars older than ∼20 Myr allows us to probe the outcome of th…
KMOS study of the mass accretion rate from Class I to Class II in NGC 1333
Fiorellino, Eleonora; Giannini, Teresa; Nisini, Brunella +6 more
Context. The mass accretion rate (\Mdot;acc) is the fundamental parameter to understand the process of mass assembly that results in the formation of a low-mass star. This parameter has been largely studied in Classical T Tauri stars in star-forming regions with ages of ∼1 − 10 Myr. However, little is known about the accretion propertie…
A million asteroid observations in the Sloan Digital Sky Survey
Carry, Benoit; Sergeyev, Alexey V.
Context. The populations of small bodies of the Solar System (asteroids, comets, Kuiper-Belt objects) are used to constrain the origin and evolution of the Solar System. Both their orbital distribution and composition distribution are required to track the dynamical pathway from their regions of formation to their current locations.
Aims: We …
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…