Search Publications
JWST's PEARLS: A new lens model for ACT-CL J0102−4915, "El Gordo," and the first red supergiant star at cosmological distances discovered by JWST
Ryan, R. E.; Diego, J. M.; Zitrin, A. +29 more
The first James Webb Space Telescope (JWST) data on the massive colliding cluster
The production of ionizing photons in UV-faint z ∼ 3-7 galaxies
Calabrò, Antonello; Castellano, Marco; Pentericci, Laura +20 more
Aims: The demographics of the production and escape of ionizing photons from UV-faint early galaxies is a key unknown that has hindered attempts to discover the primary drivers of reionization. With the advent of JWST, it is finally possible to observe the rest-frame optical nebular emission from individual sub-L*z > 3 galaxies …
Gaia Data Release 3. The Solar System survey
Klioner, S. A.; Mignard, F.; Tanga, P. +30 more
Context. The third data release by the Gaia mission of the European Space Agency (DR3) is the first release to provide the community with a large sample of observations for more than 150 thousand Solar System objects, including asteroids and natural planetary satellites. The release contains astrometry (over 23 million epochs) and photometry, alon…
The Gaia-ESO survey: Mapping the shape and evolution of the radial abundance gradients with open clusters
Baratella, M.; Gilmore, G.; Recio-Blanco, A. +28 more
Context. The spatial distribution of elemental abundances and their time evolution are among the major constraints to disentangling the scenarios of formation and evolution of the Galaxy.
Aims: In this paper we used the sample of open clusters available in the final release of the Gaia-ESO survey to trace the Galactic radial abundance and abu…
New predictions for radiation-driven, steady-state mass-loss and wind-momentum from hot, massive stars. III. Updated mass-loss rates for stellar evolution
Puls, J.; Najarro, F.; Sundqvist, J. O. +2 more
Context. Massive stars lose a large fraction of their mass to radiation-driven winds throughout their entire life. These outflows impact both the life and death of these stars and their surroundings.
Aims: Theoretical mass-loss rates of hot, massive stars are derived to be used in applications such as stellar evolution. The behaviour of these…
X-Shooting ULLYSES: Massive stars at low metallicity. I. Project description
Bouret, J. -C.; Martins, F.; van Loon, J. Th. +78 more
Observations of individual massive stars, super-luminous supernovae, gamma-ray bursts, and gravitational wave events involving spectacular black hole mergers indicate that the low-metallicity Universe is fundamentally different from our own Galaxy. Many transient phenomena will remain enigmatic until we achieve a firm understanding of the physics …
The star formation history of the Sco-Cen association. Coherent star formation patterns in space and time
Meingast, Stefan; Alves, João; Rottensteiner, Alena +13 more
We reconstructed the star formation history of the Sco-Cen OB association using a novel high-resolution age map of the region. We developed an approach to produce robust ages for Sco-Cen's recently identified 37 stellar clusters using the SigMA algorithm. The Sco-Cen star formation timeline reveals four periods of enhanced star formation activity,…
AF Lep b: The lowest-mass planet detected by coupling astrometric and direct imaging data
Kervella, P.; D'Orazi, V.; Zurlo, A. +6 more
Aims: Using the direct-imaging technique, we searched for low-mass companions around the star AF Lep, which presents a significant proper-motion anomaly (PMa) signal obtained from the comparison of HIPPARCOS and Gaia eDR3 catalogs.
Methods: We observed AF Lep in two epochs with VLT/SPHERE using its subsystems IFS and IRDIS in the near-in…
Gaia Data Release 3. Gaia scan-angle-dependent signals and spurious periods
Harrison, D. L.; Audard, M.; Gosset, E. +23 more
Context. Gaia Data Release 3 (Gaia DR3) time series data may contain spurious signals related to the time-dependent scan angle.
Aims: We aim to explain the origin of scan-angle-dependent signals and how they can lead to spurious periods, provide statistics to identify them in the data, and suggest how to deal with them in Gaia DR3 data and in…
Detection of the Keplerian decline in the Milky Way rotation curve
Amram, Philippe; Chemin, Laurent; Hammer, François +4 more
Our position inside the Galactic disc has previously prevented us from establishing an accurate rotation curve (RC). The advent of Gaia and its third data release (Gaia DR3) made it possible to specify the RC up to twice the optical radius. We aim to establish a new RC of the Galaxy from the Gaia DR3 by drastically reducing systematic uncertaintie…