Search Publications
The origin of close massive binaries in the M17 star-forming region
Sana, H.; Frost, A. J.; Reggiani, M. +5 more
Context. Spectroscopic multiplicity surveys of O stars in young clusters and OB associations have revealed that a large portion (∼70%) of these massive stars (Mi > 15 M⊙) belong to close and short-period binaries (with a physical separation of less than a few astronomical units). Follow-up VLT(I) high-angular-resolution ob…
FEEDBACK from the NGC 7538 H II region
Schneider, N.; Beuther, H.; Tielens, A. G. G. M. +10 more
Context. The interaction of expanding H II regions with their environmental clouds is one of the central questions driving the Stratospheric Observatory for Infrared Astronomy (SOFIA) legacy program FEEDBACK.
Aims: We want to understand the interaction of the prototypical NGC 7538 H II region with the neighboring molecular cloud hosting sever…
Atomic and molecular gas from the epoch of reionisation down to redshift 2
Ciardi, Benedetta; Péroux, Céline; Maio, Umberto
Context. Cosmic gas makes up about 90% of the baryonic matter in the Universe and H2 molecule is the most tightly linked to star formation.
Aims: In this work we study cold neutral gas, its H2 component at different epochs, and corresponding depletion times.
Methods: We perform state-of-the-art hydrodynamic simulati…
J-PLUS: Searching for very metal-poor star candidates using the SPEEM pipeline
Sobral, David; Lee, Young Sun; Placco, Vinicius M. +25 more
Context. We explore the stellar content of the Javalambre Photometric Local Universe Survey (J-PLUS) Data Release 2 and show its potential for identifying low-metallicity stars using the Stellar Parameters Estimation based on Ensemble Methods (SPEEM) pipeline.
Aims: SPEEM is a tool used to provide determinations of atmospheric parameters for …
Successive deuteration in low-mass star-forming regions: The case of D2-methanol (CHD2OH) in IRAS 16293-2422
Margulès, Laurent; Drozdovskaya, Maria N.; Jørgensen, Jes K. +3 more
Context. Di-deuterated molecules are observed in the earliest stages of star formation at abundances of a few percent relative to their nondeuterated isotopologs, which is unexpected considering the scarcity of deuterium in the interstellar medium. With sensitive observations leading to the detection of a steadily increasing number of di-deuterate…
A scaled-up planetary system around a supernova progenitor
Quanz, S. P.; Henning, T.; Mayer, L. +24 more
Context. Virtually all known exoplanets reside around stars with M < 2.3 M⊙ either due to the rapid evaporation of the protostellar disks or to selection effects impeding detections around more massive stellar hosts.
Aims: To clarify if this dearth of planets is real or a selection effect, we launched the planet-hunting B-star E…
A CO isotopologue Line Atlas within the Whirlpool galaxy Survey (CLAWS)
Kruijssen, J. M. Diederik; Leroy, Adam K.; Rosolowsky, Erik +24 more
We present the CO isotopologue Line Atlas within the Whirpool galaxy Survey (CLAWS), which is based on an IRAM 30 m large programme that provides a benchmark study of numerous faint CO isotopologues in the millimetre-wavelength regime across the full disc of the nearby grand-design spiral galaxy M 51 (NGC 5194). The survey's core goal is to use th…
COSMOS2020: UV-selected galaxies at z ≥ 7.5
Sanders, D. B.; Ilbert, O.; Kartaltepe, J. S. +16 more
This paper presents a new search for z ≥ 7.5 galaxies using the COSMOS2020 photometric catalogues. Finding galaxies at the reionisation epoch through deep imaging surveys remains observationally challenging. The larger area covered by ground-based surveys such as COSMOS enables the discovery of the brightest galaxies at these high redshifts. Cover…
Characteristics and evolution of sheath and leading edge structures of interplanetary coronal mass ejections in the inner heliosphere based on Helios and Parker Solar Probe observations
Temmer, M.; Bothmer, V.
Context. We investigated the plasma and magnetic field characteristics of the upstream regions of interplanetary coronal mass ejections (ICMEs) and their evolution as function of distance to the Sun in the inner heliosphere. Results are related both to the development of interplanetary shocks, sheath regions, and compressed solar wind plasma ahead…
Prominence eruption observed in He II 304 Å up to >6 R⊙ by EUI/FSI aboard Solar Orbiter
Heinzel, P.; Mierla, M.; Zhukov, A. N. +24 more
Aims: We report observations of a unique, large prominence eruption that was observed in the He II 304 Å passband of the Extreme Ultraviolet Imager/Full Sun Imager telescope aboard Solar Orbiter on 15-16 February 2022.
Methods: Observations from several vantage points - Solar Orbiter, the Solar-Terrestrial Relations Observatory, the Sola…