Search Publications
New constraints on the disk characteristics and companion candidates around T Chamaeleontis with VLT/SPHERE
Pinte, C.; Ménard, F.; Ginski, C. +34 more
Context. The transition disk around the T Tauri star T Cha possesses a large gap, making it a prime target for high-resolution imaging in the context of planet formation.
Aims: We aim to find signs of disk evolutionary processes by studying the disk geometry and the dust grain properties at its surface, and to search for companion candidates.…
Blowout jets and impulsive eruptive flares in a bald-patch topology
Srivastava, A. K.; Mandrini, C. H.; Schmieder, B. +7 more
Context. A subclass of broad extreme ultraviolet (EUV) and X-ray jets, called blowout jets, have become a topic of research since they could be the link between standard collimated jets and coronal mass ejections (CMEs).
Aims: Our aim is to understand the origin of a series of broad jets, some of which are accompanied by flares and associated…
EGG: hatching a mock Universe from empirical prescriptions⋆
Elbaz, D.; Ferguson, H. C.; Okumura, K. +14 more
This paper introduces EGG, the Empirical Galaxy Generator, a tool designed within the ASTRODEEP collaboration to generate mock galaxy catalogs for deep fields with realistic fluxes and simple morphologies. The simulation procedure is based exclusively on empirical prescriptions - rather than first principles - to provide the most accurate match wi…
An 80 au cavity in the disk around HD 34282
Pinte, C.; Ménard, F.; van der Plas, G. +5 more
Context. Large cavities in disks are important testing grounds for the mechanisms proposed to drive disk evolution and dispersion, such as dynamical clearing by planets and photoevaporation.
Aims: We aim to resolve the large cavity in the disk around HD 34282, whose presence has been predicted by previous studies modeling the spectral energy …
Computational helioseismology in the frequency domain: acoustic waves in axisymmetric solar models with flows
Gizon, Laurent; Birch, Aaron C.; Fournier, Damien +7 more
Context. Local helioseismology has so far relied on semi-analytical methods to compute the spatial sensitivity of wave travel times to perturbations in the solar interior. These methods are cumbersome and lack flexibility.
Aims: Here we propose a convenient framework for numerically solving the forward problem of time-distance helioseismology…
Inferring the three-dimensional distribution of dust in the Galaxy with a non-parametric method . Preparing for Gaia
Bailer-Jones, C. A. L.; Fouesneau, M.; Rezaei Kh., S. +1 more
We present a non-parametric model for inferring the three-dimensional (3D) distribution of dust density in the Milky Way. Our approach uses the extinction measured towards stars at different locations in the Galaxy at approximately known distances. Each extinction measurement is proportional to the integrated dust density along its line of sight (…
Magnetic reconnection during eruptive magnetic flux ropes
Lin, J.; Roussev, I. I.; Keppens, R. +1 more
Aims: We perform a three-dimensional (3D) high resolution numerical simulation in isothermal magnetohydrodynamics to study the magnetic reconnection process in a current sheet (CS) formed during an eruption of a twisted magnetic flux rope (MFR). Because the twist distribution violates the Kruskal-Shafranov condition, the kink instability occu…
Galactic winds with MUSE: A direct detection of Fe II* emission from a z = 1.29 galaxy
Bacon, Roland; Finley, Hayley; Bouché, Nicolas +13 more
Emission signatures from galactic winds provide an opportunity to directly map the outflowing gas, but this is traditionally challenging because of the low surface brightness. Using very deep observations (27 h) of the Hubble Deep Field South with the Multi Unit Spectroscopic Explorer (MUSE) instrument, we identify signatures of an outflow in both…
A mid-IR interferometric survey with MIDI/VLTI: resolving the second-generation protoplanetary disks around post-AGB binaries
Waters, L. B. F. M.; Debosscher, J.; de Wit, W. -J. +7 more
Aims: We present a mid-IR interferometric survey of the circumstellar environment of a specific class of post-asymptotic giant branch (post-AGB) binaries. For this class the presence of a compact dusty disk has been postulated on the basis of various spatially unresolved measurements. The aim is to determine the angular extent of the N-band e…
The circumstellar envelope around the S-type AGB star W Aql. Effects of an eccentric binary orbit
Lindqvist, M.; Olofsson, H.; De Beck, E. +9 more
Context. Recent observations at subarcsecond resolution, now possible also at submillimeter wavelengths, have shown intricate circumstellar structures around asymptotic giant branch (AGB) stars, mostly attributed to binary interaction. The results presented here are part of a larger project aimed at investigating the effects of a binary companion …