Search Publications
The first catalogue of spectroscopically confirmed red nuggets at z ∼ 0.7 from the VIPERS survey. Linking high-z red nuggets and local relics
Pollo, Agnieszka; Małek, Katarzyna; Siudek, Małgorzata +4 more
Context. Red nuggets are a rare population of passive compact massive galaxies thought to be the first massive galaxies that formed in the Universe. First found at z ∼ 3, they are even less abundant at lower redshifts, and it is believed that with time they mostly transformed through mergers into today's giant ellipticals. The red nuggets that man…
Search for lithium-rich giants in 32 open clusters with high-resolution spectroscopy★
Pancino, E.; Bossini, D.; Sousa, S. G. +3 more
Context. Lithium-rich giant stars are rare and their existence poses a challenge to our understanding of stellar structure and evolution. In particular, open clusters aptly constrain the mass and age of their members, offering a unique opportunity to understand the evolutionary stage where Li enrichment occurs.
Aims: We take advantage of the …
Testing external photoevaporation in the σ-Orionis cluster with spectroscopy and disk mass measurements
Lodato, G.; Williams, J. P.; Ansdell, M. +8 more
Context. The evolution of protoplanetary disks is regulated by an interplay of several processes, either internal to the system or related to the environment. As most of the stars and planets, including our own Solar System, have formed in massive stellar clusters that contain OB-type stars, studying the effects of UV radiation on disk evolution i…
Clustering dependence on Lyα luminosity from MUSE surveys at 3 < z < 6
Krumpe, M.; Wisotzki, L.; Urrutia, T. +6 more
We investigate the dependence of Lyα emitter (LAE) clustering on Lyα luminosity and connect the clustering properties of ≈L⋆ LAEs with those of much fainter ones, namely, ≈0.04L⋆. We use 1030 LAEs from the MUSE-Wide survey, 679 LAEs from MUSE-Deep, and 367 LAEs from the to-date deepest ever spectroscopic survey, the MUSE Extr…
Confirmation of an He I evaporating atmosphere around the 650-Myr-old sub-Neptune HD 235088 b (TOI-1430 b) with CARMENES
Sánchez-López, A.; López-Puertas, M.; Nagel, E. +31 more
HD 235088 (TOI-1430) is a young star known to host a sub-Neptune-sized planet candidate. We validated the planetary nature of HD 235088 b with multiband photometry, refined its planetary parameters, and obtained a new age estimate of the host star, placing it at 600-800 Myr. Previous spectroscopic observations of a single transit detected an exces…
The chemical DNA of the Magellanic Clouds. I. The chemical composition of 206 Small Magellanic Cloud red giant stars
Lardo, C.; Bellazzini, M.; Mucciarelli, A. +4 more
We present the chemical composition of 206 red giant branch stars that are members of the Small Magellanic Cloud (SMC) using optical high-resolution spectra collected with the multi-object spectrograph FLAMES-GIRAFFE at the ESO Very Large Telescope. This sample includes stars in three fields that are located in different positions within the paren…
Massive galaxy formation caught in action at z ∼ 5 with JWST
Greve, Thomas R.; Brammer, Gabriel B.; Toft, Sune +13 more
We report the discovery of a compact group of galaxies, CGG-z5, at z ∼ 5.2 in the EGS field covered by the JWST/CEERS survey. CGG-z5 was selected as the highest overdensity of galaxies at z > 2 in recent JWST public surveys and it consists of six candidate members lying within a projected area of 1.5″ × 3″ (10×20 kpc2). All group mem…
The early evolution of young massive clusters. The kinematic history of NGC 6611/M16
Kaper, L.; de Koter, A.; Lamers, H. J. G. L. M. +3 more
Context. Young massive clusters provide the opportunity to study the outcome of the star formation process and the early evolution of star clusters. In the first few million years, the (massive) stars dynamically interact, producing runaways and affecting the initial (binary) population.
Aims: Observing and interpreting the dynamics of young …
Witnessing the fragmentation of a filament into prestellar cores in Orion B/NGC 2024
André, Ph.; Arzoumanian, D.; Könyves, V. +3 more
Context. Recent Herschel observations of nearby molecular clouds have shown that filamentary structures are ubiquitous and that most prestellar cores form in dense filaments. Probing the detailed density and velocity structure of molecular filaments is therefore crucial for improving our observational understanding of the star formation process. <…
ATOMIUM: Probing the inner wind of evolved O-rich stars with new, highly excited H2O and OH lines
Menten, K. M.; Kervella, P.; Müller, H. S. P. +17 more
Context. Water (H2O) and the hydroxyl radical (OH) are major constituents of the envelope of O-rich late-type stars. Transitions involving energy levels that are rotationally or vibrationally highly excited (energies ≳4000 K) have been observed in both H2O and OH. These and more recently discovered transitions can now be obse…