Search Publications
A new dynamical modeling of the WASP-47 system with CHEOPS observations
Alonso, R.; Deleuil, M.; Erikson, A. +80 more
Among the hundreds of known hot Jupiters (HJs), only five have been found to have companions on short-period orbits. Within this rare class of multiple planetary systems, the architecture of WASP-47 is unique, hosting an HJ (planet-b) with both an inner and an outer sub-Neptunian mass companion (-e and -d, respectively) as well as an additional no…
JWST uncovers helium and water abundance variations in the bulge globular cluster NGC 6440
Cadelano, Mario; Pallanca, Cristina; Dalessandro, Emanuele +9 more
We used ultra-deep observations obtained with the NIRCam aboard the James Webb Space Telescope to explore the stellar population of NGC 6440: a typical massive, obscured, and contaminated globular cluster formed and orbiting within the Galactic bulge. Leveraging the exceptional capabilities of this camera, we sampled the cluster down to about five…
Short-period pulsating hot-subdwarf stars observed by TESS. I. Southern ecliptic hemisphere
Van Grootel, V.; Charpinet, S.; Kilkenny, D. +7 more
We present results of a Transiting Exoplanet Survey Satellite (TESS) search for short-period pulsations in compact stellar objects observed in years 1 and 3 of the TESS mission, during which the southern ecliptic hemisphere was targeted. We describe the TESS data used and the details of the search method. For many of the targets, we use unpublishe…
Multiwavelength study of the galactic PeVatron candidate LHAASO J2108+5157
Antonelli, L. A.; Fukazawa, Y.; Gasparrini, D. +267 more
Context. Several new ultrahigh-energy (UHE) γ-ray sources have recently been discovered by the Large High Altitude Air Shower Observatory (LHAASO) collaboration. These represent a step forward in the search for the so-called Galactic PeVatrons, the enigmatic sources of the Galactic cosmic rays up to PeV energies. However, it has been shown that mu…
Potential scientific synergies in weak lensing studies between the CSST and Euclid space probes
Schrabback, T.; Zhang, J.; Kneib, J. P. +24 more
Aims: With the next generation of large surveys poised to join the ranks of observational cosmology in the near future, it is important to explore their potential synergies and to maximize their scientific outcomes. In this study, we aim to investigate the complementarity of two upcoming space missions: Euclid and the China Space Station Tele…
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…