Search Publications
SEEDisCS. I. Molecular gas in galaxy clusters and their large-scale structure: The case of CL1411.1−1148 at z ∼ 0.5
Jablonka, P.; De Lucia, G.; Zaritsky, D. +7 more
We investigate how the galaxy reservoirs of molecular gas fuelling star formation are transformed while the host galaxies infall onto galaxy cluster cores. As part of the Spatially Extended ESO Distant Cluster Survey (SEEDisCS), we present CO(3-2) observations of 27 star-forming galaxies obtained with the Atacama Large Millimeter Array. These sour…
New low-mass members of Chamaeleon I and ϵ Cha
Scholz, A.; Mužić, K.; Almendros-Abad, V. +3 more
Aims: The goal of this paper is to increase the membership list of the Chamaeleon star-forming region and the ϵ Cha moving group, in particular for low-mass stars and substellar objects. We extended the search region significantly beyond the dark clouds.
Methods: Our sample has been selected based on proper motions and colours obtained f…
Energetic ions in the Venusian system: Insights from the first Solar Orbiter flyby
Kulkarni, S. R.; Maksimovic, M.; Bale, S. D. +54 more
The Solar Orbiter flyby of Venus on 27 December 2020 allowed for an opportunity to measure the suprathermal to energetic ions in the Venusian system over a large range of radial distances to better understand the acceleration processes within the system and provide a characterization of galactic cosmic rays near the planet. Bursty suprathermal ion…
How many suns are in the sky? A SPHERE multiplicity survey of exoplanet host stars. I. Four new close stellar companions including a white dwarf
Ginski, C.; Mugrauer, M.; Vogt, N. +2 more
Aims: We are studying the influence of stellar multiplicity on exoplanet systems and, in particular, systems that have been detected via radial-velocity searches. We are specifically interested in the closest companions as they would have a strong influence on the evolution of the original planet-forming disks. In this study, we present new c…
FEDReD. III. Unraveling the 3D structure of Vela
Arenou, F.; Babusiaux, C.; Hottier, C.
Context. The Vela complex is a region of the sky that gathers several stellar and interstellar structures in a few hundred square degrees. Aims.Gaia data now allow us to obtain a 3D view of the Vela interstellar structures through the dust extinction.
Methods: We used the FEDReD (Field Extinction-Distance Relation Deconvolver) algorithm on ne…
Populations of super-soft X-ray sources in galaxies of different morphological types
Gilfanov, M.; Galiullin, I.
Aims: We study populations of soft and super-soft X-ray sources (SSSs) in nearby galaxies of various morphological types with particular emphasis on characterizing populations of stable nuclear burning, accreting white dwarfs (WDs).
Methods: Analyzing the content of the Chandra archive, we assembled a sample of nearby galaxies suitable f…
HADES RV Programme with HARPS-N at TNG. XIII. A sub-Neptune around the M dwarf GJ 720 A
Rebolo, R.; Ribas, I.; Scandariato, G. +21 more
Context. The high number of super-Earth and Earth-like planets in the habitable zone detected around M-dwarf stars in recent years has revealed these stellar objects to be the key to planetary radial velocity (RV) searches.
Aims: Using the HARPS-N spectrograph within The HArps-n red Dwarf Exoplanet Survey (HADES) we have reached the precision…
A confined dynamo: Magnetic activity of the K-dwarf component in the pre-cataclysmic binary system V471 Tauri
Kriskovics, L.; Oláh, K.; Borkovits, T. +6 more
Context. Late-type stars in close binary systems can exhibit strong magnetic activity owing to rapid rotation supported by tidal locking. On the other hand, tidal coupling may suppress the differential rotation which is a key ingredient of the magnetic dynamo.
Aims: We studied the red dwarf component in the eclipsing binary system V471 Tau in…
Maximum helium content of multiple populations in the globular cluster NGC 6752
Martins, F.; Charbonnel, C.; Chantereau, W.
Context. Multiple populations in globular clusters are usually explained by the formation of stars out of material with a chemical composition that is polluted to different degrees by the ejecta of short-lived, massive stars. But the nature of the "polluters" remains elusive. Different types of stars have been proposed to account for the observed …
Investigating three Sirius-like systems with SPHERE
Rouan, D.; Ménard, F.; Avenhaus, H. +61 more
Context. Sirius-like systems are relatively wide binaries with a separation from a few to hundreds of au; they are composed of a white dwarf (WD) and a companion of a spectral type earlier than M0. Here we consider main sequence (MS) companions, where the WD progenitor evolves in isolation, but its wind during the former asymptotic giant branch (A…