Search Publications
A major asymmetric ice trap in a planet-forming disk. I. Formaldehyde and methanol
Booth, Alice S.; van Dishoeck, Ewine F.; Leemker, Margot +2 more
Context. The chemistry of planet-forming disks sets the exoplanet atmosphere composition and the prebiotic molecular content. Dust traps are of particular importance as pebble growth and transport are crucial for setting the chemistry where giant planets form.
Aims: The asymmetric Oph IRS 48 dust trap located at 60 au radius provides a unique…
Tempestuous life beyond R500: X-ray view on the Coma cluster with SRG/eROSITA. I. X-ray morphology, recent merger, and radio halo connection
Sunyaev, R.; Churazov, E.; Bykov, A. M. +2 more
This is the first paper in a series of studies of the Coma cluster using the SRG/eROSITA X-ray data obtained in the course of the calibration and performance verification observations. The data cover a ~3° × 3° area around the cluster with a typical exposure time of more than 20 ks. The stability of the instrumental background and operation of the…
A survey of the linear polarization of directly imaged exoplanets and brown dwarf companions with SPHERE-IRDIS. First polarimetric detections revealing disks around DH Tau B and GSC 6214-210 B
Ménard, F.; Schmidt, T. O. B.; Ginski, C. +22 more
Context. Young giant planets and brown dwarf companions emit near-infrared radiation that can be linearly polarized up to several percent. This polarization can reveal the presence of an (unresolved) circumsubstellar accretion disk, rotation-induced oblateness of the atmosphere, or an inhomogeneous distribution of atmospheric dust clouds.
Aim…
Gaia Early Data Release 3. Updated radial velocities from Gaia DR2
Smith, M.; Gosset, E.; Allende Prieto, C. +40 more
Context. Gaia's Early Third Data Release (EDR3) does not contain new radial velocities because these will be published in Gaia's full third data release (DR3), expected in the first half of 2022. To maximise the usefulness of EDR3, Gaia's second data release (DR2) sources (with radial velocities) are matched to EDR3 sources to allow their DR2 radi…
An all-sky sample of intermediate- to high-mass OBA-type eclipsing binaries observed by TESS
Garcia, S.; De Ridder, J.; Aerts, C. +4 more
Context. Intermediate- to high-mass stars are the least numerous types of stars, and they are less well understood than their more numerous low-mass counterparts in terms of their internal physical processes. Modelling the photometric variability of a large sample of main-sequence intermediate- to high-mass stars in eclipsing binary systems will h…
Multiphase feedback processes in the Sy2 galaxy NGC 5643
Rigopoulou, D.; Carrera, F. J.; García-Burillo, S. +11 more
We study the multiphase feedback processes in the central ∼3 kpc of the barred Seyfert 2 galaxy NGC 5643. We used observations of the cold molecular gas (ALMA CO(2-1) transition) and ionized gas (MUSE IFU optical emission lines). We studied different regions along the outflow zone, which extends out to ∼2.3 kpc in the same direction (east-west) as…
HOLISMOKES. VI. New galaxy-scale strong lens candidates from the HSC-SSP imaging survey
Suyu, S. H.; Cañameras, R.; Schuldt, S. +8 more
We have carried out a systematic search for galaxy-scale strong lenses in multiband imaging from the Hyper Suprime-Cam (HSC) survey. Our automated pipeline, based on realistic strong-lens simulations, deep neural network classification, and visual inspection, is aimed at efficiently selecting systems with wide image separations (Einstein radii θ
Empirical mass-loss rates and clumping properties of Galactic early-type O supergiants
Puls, J.; de Koter, A.; Sana, H. +7 more
Aims: We investigate the impact of optically thick clumping on spectroscopic stellar wind diagnostics in O supergiants and constrain wind parameters associated with porosity in velocity space. This is the first time the effects of optically thick clumping have been investigated for a sample of massive hot stars, using models which include a f…
The Rossiter-McLaughlin effect revolutions: an ultra-short period planet and a warm mini-Neptune on perpendicular orbits
Rebolo, R.; Zapatero Osorio, M. R.; Scandariato, G. +34 more
Comparisons of the alignment of exoplanets with a common host star and each other can be used to distinguish among concurrent evolution scenarios for the star and the planets. However, multi-planet systems usually host mini-Neptunes and super-Earths, whose sizes make orbital architecture measurements challenging. We introduce the Rossiter-McLaughl…
The properties of the AGN torus as revealed from a set of unbiased NuSTAR observations
Ajello, M.; Marchesi, S.; Torres-Albà, N. +4 more
The obscuration observed in active galactic nuclei (AGNs) is mainly caused by dust and gas distributed in a torus-like structure surrounding the supermassive black hole. However, the properties of the obscuring torus of an AGN in X-ray have not yet been fully investigated because of a lack of high-quality data and proper models. In this work, we p…